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Alaska Oil and Gas Conservation Commission
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HomeMy WebLinkAbout100-008From:Guhl, Meredith D (OGC)
To:Roby, David S (OGC); Davies, Stephen F (OGC); Boman, Wade C (OGC); "danny.kara@outlook.com"; Quick,
Michael; Rixse, Melvin G (OGC); Loepp, Victoria T (OGC); Roby, David S (OGC); Isaacson, William
Cc:Chmielowski, Jessie L C (OGC); Wilson, Greg C (OGC)
Subject:RE: Rosetta Well P&A Peer Review
Date:Thursday, June 8, 2023 3:26:00 PM
All,
I called Mike Belowich, a long time coal geologist in the valley who I’ve worked with before. He
didn’t have much information about the US Bureau of Mine diamond core holes other than what is
in the report. He had heard some hearsay that the core was not kept, but buried at the drillsites.
He visited the Houston pit in Fall 2022 and stated that the Core Hole 1 was leaking water at that time
and the person he was with had a gas sniffer and detected the presence of gas. His instructions on
how to find the core hole were “park at the cell tower and walk to the left side of the pit. The pipe is
visible right above the highwall.”
Mike sat the Evergreen Resources Houston Pit #1 well, PTD 203-206, and stated they hit the “same
gas sand” in that well as was seen in the Rosetta wells at about 400’. That well was drilled in 2004 so
likely has some more current data associated with it.
Cheers,
Meredith
Meredith Guhl (she/her)
Petroleum Geology Assistant
Alaska Oil and Gas Conservation Commission
333 W. 7th Ave, Anchorage, AK 99501
meredith.guhl@alaska.gov
Direct: (907) 793-1235
CONFIDENTIALITY NOTICE: This e-mail message, including any attachments, contains information from the Alaska Oil and Gas
Conservation Commission (AOGCC), State of Alaska and is for the sole use of the intended recipient(s). It may contain
confidential and/or privileged information. The unauthorized review, use or disclosure of such information may violate state
or federal law. If you are an unintended recipient of this e-mail, please delete it, without first saving or forwarding it, and, so
that the AOGCC is aware of the mistake in sending it to you, contact Meredith Guhl at 907-793-1235 or
meredith.guhl@alaska.gov.
From: Roby, David S (OGC) <dave.roby@alaska.gov>
Sent: Thursday, June 8, 2023 12:23 PM
To: Guhl, Meredith D (OGC) <meredith.guhl@alaska.gov>
Subject: FW: Rosetta Well P&A Peer Review
Dave Roby
(907)793-1232
From: McLellan, Bryan J (OGC) <bryan.mclellan@alaska.gov>
Sent: Thursday, June 8, 2023 12:03 PM
To: Davies, Stephen F (OGC) <steve.davies@alaska.gov>; Boman, Wade C (OGC)
<wade.boman@alaska.gov>; Danny Kara <danny.kara@outlook.com>; Quick, Michael
<mquick@asrcenergy.com>; Rixse, Melvin G (OGC) <melvin.rixse@alaska.gov>; Loepp, Victoria T
(OGC) <victoria.loepp@alaska.gov>; Roby, David S (OGC) <dave.roby@alaska.gov>; Isaacson, William
<wisaacson@asrcenergy.com>
Cc: Chmielowski, Jessie L C (OGC) <jessie.chmielowski@alaska.gov>; Wilson, Greg C (OGC)
<greg.wilson@alaska.gov>
Subject: RE: Rosetta Well P&A Peer Review
For those of you who can’t attend the meeting in person, I’ve attached wellbore diagrams based on
the limited records we have. Steve will show us that Rosetta 2 was drilled deeper than shown on the
diagram.
Bryan McLellan
Senior Petroleum Engineer
Alaska Oil & Gas Conservation Commission
Bryan.mclellan@alaska.gov
+1 (907) 250-9193
-----Original Appointment-----
From: McLellan, Bryan J (OGC)
Sent: Wednesday, May 31, 2023 1:58 PM
To: McLellan, Bryan J (OGC); Davies, Stephen F (OGC); Boman, Wade C (OGC); Danny Kara; Quick,
Michael; Rixse, Melvin G (OGC); Loepp, Victoria T (OGC); Roby, David S (OGC); Isaacson, William
Cc: Chmielowski, Jessie L C (OGC); Wilson, Greg C (OGC)
Subject: Rosetta Well P&A Peer Review
When: Thursday, June 8, 2023 12:30 PM-2:30 PM (UTC-09:00) Alaska.
Where: Microsoft Teams Meeting; AOGCC public meeting room
All, we will be meeting in the AOGCC Public Meeting room, but also have Teams open and we can
share on the big screen. Mike & Bill, it would be good if you can come over to our office for the
meeting.
Planning a peer review to look at the geology and existing wellbore conditions to determine where
P&A plugs will be required in the Orphan Wells at Rosetta. We will plan to cover Rosetta 1 & 2
definitely, and look into Rosetta 3 & 4 depending on time available.
The goal of the meeting is to have alignment from the AOGCC on exactly where P&A plugs are
required in these unconventional situations. This will provide the framework for ASRC and our
Independent Cost Estimator to write up the programs and provide cost estimates for the work.
________________________________________________________________________________
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________________________________________________________________________________
Bureau of Mines
Report of Investigations 5350
I
I
/I
INVESTIGATION OF SUBBITUMINOUS-COAL BEDS
NEAR HOUSTON, WESTWARD EXTREMITY
OF MATANUSKA COALFIELD, ALASKA
BY R. R. MAY AND R. S. WARFIELD
I
t
United States Department of the Interior-August 1957
I----
INVESTIGATION OF SUBBITUMINOUS-COAL BEDS
NEAR HOUSTON, WESTWARD EXTREMITY
OF MATANUSKA COALFIELD, ALASKA
BY R. R. MAY AND R. S. WARFIELD
* * * * * * * * *Report of Investigations 5350
UNITED STATES DEPARTMENT OF THE INTERIOR
Fred A. Seaton, Secretary
BUREAU OF MINES
Marling J. Ankeny, Director
Work on manuscript completed November 1956. The Bureau of Mines will welcome reprinting of this paper, provided
the following footnote acknowledgment is made: "Reprinted from Bureau of Mines Report of Investigations 5350."
August 1957
I
INVESTIGATION OF SUBBITUMINOUS-COAL BEDS NEAR HOUSTON,
WESTWARD EXTREMITY OF MATANUSKA COALFIELD, ALASKA
by
R. R. Mayl/ and R. S. Worfield /
CONTENTS
Page
Summary .................. ....................................... 1
Introduction ..... .... .......... ,...... .,... ... ......... 1
Acknowledgments .......... ........ ... ...... .... 0. ......... 2
Description of area............... ............ ........ .. 2
Location and access .................... ...... 2
Topography. ................... ..... ...... .... ....... 2
Climate (as it affects operations).... ..... .............. 2
History and production,.. .. .... ............ ................... 4
Geology .... ................................ ...... .......... .4
The coal ..... .....,,................... ..... .......... 5
Coal sampling and analysis ........................... 5
Mining and preparation...... .... ........ ........... 7
Work by the Bureau of Mines ............ ......................... 7
Preliminary examination... .... ................. ..... 7
Diamond drilling......... ......... ...... ........... ..... 7
Interpretation of drilling results...............,...... 9
Appendix.............. ...................................4..... 12
Logs of drill holes...................................... 12
1/ Solid fuels mining engineer, Bureau of Mines, Region I, Alaska
district, Anchorage, Alaska.
2/ Mine examination and exploration engineer, Bureau of Mines,
Region I, Juneau, Alaska.
Report of Investigations 5350
ii
ILLUSTRATIONS
Fig. Page
1. Location map, Houston coal-drilling project ................. 3
2. Plan, Houston coal-drilling project......................... 8
3. Section A-A' and graphic logs, Houston coal-drilling project 10
TABLES
1. Section in strip mine near old Evan Jones slope............. 6
2. Section in strip mine 1,200 feet northeast of old Evan
Jones slope ............................................... 6
3. Analyses of face samples from section 1,200 feet northeast
of old Evan Jones slope .................................. 6
4. Analyses of diamond-drill core samples from Houston coal-
drilling project ........................ ......... 11
1
SUMMARY
A preliminary examination of the Houston strip-coal mine, situated on the Alaska
Railroad at milepost 175 (61 rail miles north of Anchorage, Alaska) and a review of
all available information resulting from early coal exploration activities in the
area resulted in plans to investigate the coal-bearing formations at depth by means
of diamond core drilling to indicate the existence of additional reserves of coal in
close proximity to railroad transportation, where it would be quickly available to
meet rapidly expanding military and civilian fuel requirements.
From the date of mobilization of equipment, August 28, 1951, until date of sus-
pension, August 18, 1952, 2-,010 feet of diamond drilling was completed. Ten defin-
able coal beds were cut, of which 2 appear to be persistent and minable over an area
of approximately 1/2 square mile. Within this area the 2 minable beds contain
approximately 5,000,000 tons of coal in place. Of the remaining beds, at least two
others may be minable to the eastward near their projected outcrops; however, these
and deeper beds (at least in the vicinity of the drill holes) lie beneath a zone of
pressurized gas and brackish water. From a practical standpoint, continued develop-
ment and utilization of the coal in this vicinity will depend on the operators' in-
genuity in developing cheap mining methods and on diligent prospecting for strippable
coal under the comparatively light glacial cover.
INTRODUCTION
Since the advent and expansion of military installations in south central Alaska,
coupled with the resultant rapid growth of population, the delineation and development
of the Matanuska coal field have assumed considerable importance, particularly in
those parts of the field that are accessible by existing transportation facilities.
Little work of an evaluating nature had been done before this project was undertaken
at the western end of the Matanuska field, which abuts the main line of the Alaska
Railroad at Houston, approximately 60 miles north of Anchorage.
Although the rank of the exposed beds in the immediate vicinity of Houstin is
subbituminous, recent exploration by the Federal Geological Survey indicated a defi-
nite tie with the extensive bituminous beds of the Chickaloon coal-bearing formation
now in production a few miles eastward. Discovery of additional minable beds not
only would augment the Houston-area reserve but might lead to the discovery of nearby
reserves which, because of closer proximity to the Talkeetna Mountain uplift, might
have bituminous rank.
From observation of past and present workings and of the indicated geological
attitude of the coal-bearing formation, it appeared that a very limited drilling pro-
gram would procure the desired information. The following report presents the data
obtained by the drilling program and an interpretation of the data.
2
ACKNOWLEDGMENTS
Many of the historical data, as well as cooperation in appraisal and sampling
before initiation of the project, were furnished by Dr. George Gates and Dr. Farrell
Barnes of the Alaskan Geology Branch, Federal Geological Survey. Core and face sam-
ples of coal taken before and during the work were analyzed by the Bureau of Mines
Coal-Analysis Section, Pittsburgh, Pa., under the direction of R. F. Abernethy, chief.
The engineering department of the Alaska Railroad furnished basic alinement and ele-
vation details upon which the survey of the drilling area was based. Tucker & Peter-
son, lessors, and Duck Flat Co., production contractors, assisted the work by fur-
nishing housing and messing facilities and the occasional use of heavy equipment.
DESCRIPTION OF AREA
Location and Access
The limited area covered by the activities described in this report is within 2
miles of Houston, a station at 240 feet altitude on the main line of the Alaska Rail-
road at mile 175 (fig. 1). Houston is 61 miles north of Anchorage, near the western
toe of the Talkeetna Range, on the edge of the broad Susitna River Valley. When this
project was in progress there was no highway access, but a road from Pittman (mile
167 on the Alaska Railroad) has since made the mine accessible over the Alaska high-
way system.
Topography
The Houston-project area is on the eastern edge of the Susitna River Valley,
which is essentially a broad tundra flat cut by many, very small, meandering creeks.
The Alaska Railroad follows the toe of the foothills that slope gently upward toward
the mountains in an undulating series of benches; the project area is beside the rail-
road and at the base of this terraced slope. The Susitna Valley, which at this point
is fully 25 miles wide, appears to be covered with a semisubmerged, recessional moraine.
Tundra areas on this moraine consist of grassy swamps and pools, with patches of scrubby
spruce and brushy willow. The rising ground to the eastward is covered by glacial de-
posits of various types and by a thick forest growth; spruce and birch predominate.
As might be expected in an area where bedrock is almost completely concealed, the orig-
inal coal discovery was made in a cut incidental to railroad construction.
Climate (As It Affects Operations)
The climate here is suitable for outside operations during only about 6 months of
the year, unless shop facilities are heated and insulated and unless all-weather roads
are constructed and at considerable expense. January and February are the coldest
months, with an average daily low of minus 20°. During June, July, and August the
daily high usually is in the 60's, but during calm, clear days the temperature often
is in the 80's. Annual precipitation records for the immediate vicinity of Houston
are not available, but estimates indicate a combined rain and snow content of about
50 inches. Except where it is drifted, winter snows seldom accumulate to depths of
more than 3 feet. Summer rains generally are unpredicatable as to monthly intensity;
they seldom are heavy but often are persistent enough during early and late summer
to hamper hauling and road-maintenance work with heavy equipment.
The outdoor working season for stripping overburden usually is mid-May to mid-
October, although much subsidiary work can be done a month or so before and after
these dates; however, unless expensive methods are adopted, mining operators seldom
3
Figure 1. -Location map, Houston coal-drilling project.
4
strip overburden until June, because the ground usually freezes to a depth of 5 to 7
feet; thawing produces a tremendous amount of surface water, which bogs down most
heavy equipment.
HISTORY AND PRODUCTION
Coal was discovered in a right-of-way cut on the Alaska Railroad at Houston
station in 1917. Although the early history of the development is somewhat clouded,
it is known that, between 1917 to 1920, a coal-prospecting permit was granted on the
10-acre tract at the discovery site and that 2 slopes were driven on the coal meas-
ures. According to reports, the slopes entered 2 beds of coal, which were 3-1/2 and
5 feet thick, respectively; the beds dipped 6° to 15° northeasterly. Production dur-
ing this period is estimated at 10,000 to 15,000 tons of coal, which was sold to the
Alaska Railroad and to the domestic market in Anchorage. All of the original work-
ings have long been caved; even the caves are completely obscured by brush and slides.
The site of this early activity is approximately one-half mile southeasterly of the
present workings, from which it is separated by a low-lying muskeg swamp; therefore
correlation of the discovery beds with beds in the project area would require consid-
erable prospecting work beyond the scope of this project.
Between 1920 and 1934 no mining or development work of consequence was done near
Houston. In 1934 Arthur Heaven was granted a 160-acre homestead, which included
patent rights to underlying coal. In 1935 Evan Jones obtained prospecting permits
for 874.82 acres adjoining the homestead in sections 17, 18, and 20; in the same year
he started a slope mine near the present position of the southeast corner of the
strip pit. About 12,000 tons of coal was produced from the slope and from a few
rooms before the operation was suspended in 1940. Between 1938 and 1940 Jones joined
in partnership with George Tucker and Ralph Peterson; during this period the Heaven
patent was purchased and became the nucleus of later operations. This partnership
was terminated in 1940; thereafter permits were allowed to lapse until a revival of
interest in 1948, when an expanding military market became apparent.
In 1948 Tucker and Peterson organized the Houston Coal Co. and acquired a permit
for access to an additional 1,800 acres next to the Heaven patent; from 1949 through
the 1952 season approximately 65,000 tons of coal was marketed. Most of the coal was
passed through a crushing, screening, and washing plant, which contained a Forrester-
type jig capable of handling 15 to 25 tons per hour. Production during 1951 and 1952
was under a management-sales agreement with the Duck Flat Co., a Los Angeles organi-
zation. Virtually all production went to the military installations at Anchorage.
GEOLOGY
The geology of the Matanuska coal field is best known from the writings of Go C.
Martin of the Federal Geological Survey, who first made a general reconnaissance of
the region in 1905 and subsequently made detailed studies of the lower3/ and upper4/
parts of the field in 1910 and 1913, respectively. As defined in early descriptions,
the upper or eastern part of the Matanuska field included the Anthracite Ridge and
Chickaloon districts; the lower or western part included the Eska and Moose Creek
areas, as well as Wishbone Hill. Recent reconnaissance by the Geological Survey
along the lower reaches of the Little Susitna River and its tributaries and the work
at Houston by the Bureau of Mines indicate that the Matanuska field extends westward
3/ Martin, G. C., and Katz, F. J., Geology and Coalfields of the Lower Matanuska
Valley, Alaska: Geol. Survey Bull. 500, 1912, 98 pp.
4/ Martin, G. C., and Mertie, J. B., Jr., Mineral Resources of the Upper Matanuska
and Nelchina Valleys: Geol. Survey Bull. 592, 1914, pp. 273-299.
I
5
from Moose Creek and includes the northern edge of the lowlands lying north of Knik
Arm. Barnes designates these lowlands as the Little Susitna district of the Matanuska
coalfield; Houston and the project area are in this district.5/
The following generalized description of the geology of the Matanuska coalfield
is summarized from the above-cited publications, to which the reader is referred for
details:
All coal measures in the field occur in the Chickaloon formation (Tertiary),
which is composed of 3,000 to 5,000 feet of claystone, siltstone, sandstone, thin
beds of fine-grained conglomerate, and many beds of coal. The Chickaloon formation
is overlain by the Eska conglomerate (Tertiary) and underlain by the Matanuska and
Arkose ridge formations (Upper Cretaceous). The Eska conglomerate is not present in
the stratigraphic section at Houston. Neither the Matanuska formation nor the Arkose
ridge formation is exposed near Houston.
At Houston and throughout the field individual beds in the Chickaloon formation,
including the coal, tend to thin out or intergrade within relatively short distances.
These changes in bed thickness are believed to be due primarily to the original len-
ticular structure of the sedimentary deposits but also may be due in part to the
crumpling and pinching out of the soft shales incident to folding of parts of the
region; correlation of individual beds (including coal) for more than short distances
is therefore uncertain or impossible.
Correlation of the coal measures between districts, and often between mines in
the same district, is complicated further by differences in the character of the coal
that result from differences in the amount of faulting and folding from place to place.
The coal at Houston is subbituminous; it occurs in relatively flat lying beds that
have suffered little or no deformation.
THE COAL
Coal Sampling and Analysis
The following sections and samples were taken by R. R. May, Bureau of Mines min-
ing engineer, and F. F. Barnes, geologist, Geological Survey, September 26, 1950.
Sections and samples were taken in accordance with Bureau of Mines standard procedure
and forwarded to Pittsburgh for analysis.
5/ Barnes, Farrell F., and Payne, Thomas G., The Wishbone Hill District, Matanuska
Coal Field, Alaska: Geol. Survey Bull. 1016, 1956, p. 2.
Roof: Gray shale, coaly at base.
Coal, dull glossy/ .......................................
Bone, bright-coal streaks.................................
Coal, bright!/.............................................
Coaly shale./.............................................
Coaly shale and bone.2/...................................
Coaly/ ........................
Coaly shale2./... .............................................
Coal, clay slips./........................................
Bone......................................................
Floor: Coaly shale...............................................
6
TABLE 1. -Section in strip mine, near old Evan Jones slope
(top bench of strip-mine bed)
Roof: Gray claystone, silty. Feet Inches
Coaly shale to bone...................................... 0 2-1/2
Coal .................................. .................. .. 1-1/2
Coaly shale................ ................................ 1
Coal ..................................... 10
Bone ................................................... ... 7
Coal, bright ........................ ........ ............. 1 1-1/2
Bony coal..... ...................................... ......3-1/2
Coaly shale.l/ ............................................. 2
Claystone, thin coal stringers............/ ............ .............. 8
Claystonel/ ................................................. 2 0
Bony coal (top of lower bench) ............................. Partly exposed.
1/ Denotes parting between upper and lower benches.
TABLE 2. -Section in strip mine 1,200 feet northeast of old Evan Jones slope
(full section, both benches)
I
Feet Inches
0 9
7
1 0-1/2
1 4
2 4
1 0
4
6
2
Partly exposed.
1/ Included in analysis,lab. No. D-51894 (table 3).
2/ Denotes parting between benches.
3/ Included in analysis,lab. NO. D-51895 (table 3).
TABLE 3. -Analyses of face samples from section 1,200 feet northeast
of old Evan Jones slope
Air-drying Vol. Fixed
Sample loss Condition Moisture matter Carbon Ash Sulfur B.t.u.
D-51894 7.6 A 20.3 31.6 38.9 9.2 0.4 9,210
B 13.7 34.2 42.1 10.0 .5 9,970
C 39.6 48.9 11.5 .5 11,550
D 44.8 55.2 .6 13,060
D-51895 6.7 A 17.4 32.5 36.6 13.5 .4 9,160
B 11.5 34.8 39.3 14.4 .5 9,820
C 39.3 44.4 16.3 .5 11,090
D 47.0 53.0 .6 13,250
Condition: A -as received.
B -air-dried.
C -moisture-free.
D -moisture- and ash-free.
Analyses by H. M. Cooper, Bureau of Mines, Pittsburgh, Pa.
7
Mining and Preparation
Coal at the Houston mine (see table 1 for average section) is stripped and then
mined in successive benches by drilling vertical blast holes with a portable electric
auger on 5-foot centers; these holes are blasted lightly with 20-percent gelatin.
After being broken, the coal is loaded by power shovel onto trucks, which haul it to
the washing plant approximately 1 mile from the pit. The raw coal tends to be coarse
and slabby, with many iron-silica-sulfur concretions; therefore it requires prelimi-
nary breaking before being fed to the rolls. This breaking is accomplished by using
a small crawler tractor to crush oversize through an 8-inch grizzly into the roll-
crusher feed bin. Crushed coal for jig feed is sized to suit current contract spec-
ifications, which usually require 2-1/2 inches top size. This product is fed either
directly to through surge bins to a steam-driven Forrester-type coal jig with a 4-
by 4-foot plunger section and a 4- by 6-foot bed section. The washed-coal discharge
passes over a double-deck shaker sizing screen, with impinging sprays. Screen sizing
varies with contract purchase specifications; fines may be optionally recovered in an
Esperanza-type classifier in closed circuit with washer and screen or discarded sepa-
rately. Because the plant level at the screen discharge is 30 feet or more above the
car-loading siding, gondolas are loaded by chuting the coal to the cars. For best
washing results plant capacity is 15 to 20 tons per hour, but careful mining often
permits considerable overloading without appreciable detriment to the quality of
finished coal.
Observation of the plant operation under varying conditions indicates that the
Forrester jig is not an ideal medium for separating this coal and its inherent impu-
rities. Although the tendency of this coal to break in thin slabs undoubtedly af-
fects jigging separation, it is apparent that there is a rather narrow differential
in specific gravity between the shale-bone-coal components in this particular bed
system.
WORK BY THE BUREAU OF MINES
Preliminary Examination
In September 1950, accompanied by F. F. Barnes of the Geological Survey, the
writer inspected the mining activity at Houston. Bed sections were recorded, and
samples were taken from the strip pit (see tables 1, 2, and 3). After the prevalent
strike and dip of the measures (which were partly exposed for nearly a mile along
the railroad) were ascertained, it was tentatively concluded that numerous beds on
very moderate dips probably were present in the area.
Before this examination the current lessors had put down several shallow auger
holes in a mile-long area that extended a half mile or so from the railroad; these
holes penetrated the overburden into bedrock until coaly material was found. Be-
cause this coaly material was encountered within narrow ranges in a high percentage
of the holes, it was assumed that the coal bed was undulating in some conformance
with the existing topography and that the bed would be strippable throughout a large
area. However, later evidence disproved this assumption; consequently, it was decided
that a core-drilling pattern that would consist of 2 or 3 holes at intervals downdip
would be required to clarify the situation.
Diamond Drilling
A Bureau of Mines diamond drill was shipped to Houston in late August 1951. The
first hole was started near the strip pit highwall. This location (see fig. 2) was
-9
/\
\.4
Legend
Doimond drill hole
8
I
I
I
*^
oMP4qge Ipoo SOC
Figure 2. -Plan, Houston coal-drilling project.
chosen to establish initial correlation of the coal measures with reference to the
existing mine workings. Drilling conditions were difficult from the start; conse-
quently, progress was slow. A heavy flow of gas and brackish water, which was en-
countered during freezing weather, caused a shutdown November 10 at a hole depth of
481 feet 7 inches. The condition of the hole precluded resumption of drilling at
this location at the beginning of the next season.
Hole 2 was started May 29, 1952, at a new location; it reached a depth of 1,142
feet, which was considered sufficient to intercept any coal beds likely to outcrop
or to come within practical mining depth within a radium of a mile or so. Hole 2
was completed August 5, 1952, and the drill was moved to the third location farther
downdip, where drilling was resumed August 10.
Hole 3 was completed August 18 at a depth of 386 feet. Termination at this
relatively shallow depth was decided upon as soon as it appeared that a positive
point of correlation with beds in hole 2 had been reached.
Holes 2 and 3 were spaced at intervals of 2,050 and 2,910 feet, respectively,
which was considered the maximum distance allowable for accurate correlation. Depths
were governed by practical considerations of possible future mining operations within
the immediate Houston area.
The locations of the drill holes, pit, and washing plant and the topography of
the Houston area are shown in figure 2. Graphic logs and a section through the drill
holes are shown in figure 3. Analyses of core-drill samples are presented in table 4.
Detailed descriptive logs of the drill holes and the results of megascopic examina-
tion of coal core sections are given in the appendix.
Interpretation of Drilling Results
The area of conclusive results, particularly with regard to estimation of re-
serves, should be limited to no more than a rectangular area, approximately 1 mile
by 1/2 mile, whose long axis is roughly along the line of the 3 holes drilled. A
number of thin coal beds dip 5° to 10° northwesterly; these beds may overlie or
underlie the strip bed. Within this area no appreciable faulting or folding is
apparent, but some minor folds or displacements may be concealed by the cover of
glacial deposits and forest growth.
Although several beds appear to be minable and an appreciable tonnage is in-
dicated, it would be inadvisable to accept the reserve estimates without careful
consideration of local peculiarities. Some of the factors that might modify the
reserve estimates follow:
(1) Washer recovery varies widely according to the type of cleaning equipment
and mining practice.
(2) It has been many years since underground mining has been practiced at this
location; consequently, no accurate recovery factor is assignable.
(3) Because of adverse drilling conditions, friability of the cored material,
and the haphazard distribution of concretions in the coal measures, considerable
difficulty was experienced in recovering core samples for other than visual inspec-
tion and for comparison with coal currently being mined; therefore, core-drill sam-
ples may not be exactly representative of the thickness and character of the coal
beds drilled.
9
300
200
100
0
-100
-200
-300
-400
-500
-600
-700
-800
10
Collar El. 249 Collar El. 330 Collar EL 303
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ro
OI glliiii-:ir:.iil::l/li~llllr~l:i ::1151·:::i"':::lii;l-I rO~jpal-oriir:::::.:.::t:t~f ~i:t-i 'i i ' I ' I .I I I
0 0 0 0- k. L 0
----I N-- O //O O I
0 0o oo toO 117
0 -0
0-' u
,'t slD
0
0g,0 0'in oIn ;D
0In
(0
0
01-
0 0
O 0O
r.- cO
0
GOcc
:::: ..·.:1,:·:: :· · ·:·:I:::·: :·.·;··.·.·
'''
;:IEYI I· ·r· :I:''`''"'':':::' -.....-.,.
''':::I·] - ··::···:· ···: ·,,,,'Eilli o I·;YI; ;Il·,;r:: ···1:· ....··.·-..·.·.·. :
0 00 00 0 C
± o m
1 C -m --,
a o A >0 >0 0 -c 0
t -0 0 0^
o 6 6
In O
0 0
L, o
-cN
0
to
N
00
Tr
o 0
0
^1-
0
t
Figure 3. -Section A-A' and graphic logs, Houston coal-drilling project.
I
TABLE 4. -Analyses of diamond-drill core samples from Houston coal-drilling project
proximate analysis, Ultimate analysis, Fusability of ash,
percent -percent O F.___
0C .4 C i O I i 4o .0 i C 0 g bOZ4J I
1 10.8 329 37.3 .0 5.3 53 1.4 20.8 0.4 19.0 929 2,310 0 2, 740 .5D-74890 2 -3. 32.1 3& .r-C CP 4 1.3 2 .3 15 9,00
(Hole 4) 3 36.9 41.8 21.3 4.6 59.5 1.5 12.7 .4 21.3 10,420
J-J *-4 -0t 0 0 0 3 r M ai ) 4 4a i- N
c4 -4 51 .8 75.6 2.0 16. .5 1,240Lab. 0 r 14- 4 4 4- -4 ri g H-4 O4 ctCL O B a0 > Xi 53 c aM
No.1 ! c z > E r0 U z M c Zc 'l4.J 4 4
1 10.8 32.9 37.3 19.0 5.3 53.1 1.4 20.8 0.4 19.0 9,290 2,310 2,620 2,740 1.53
D-74890 2 13.0 32.1 36.4 18.5 5.4 51.8 1.3 22.7 .3 18.5 9,070
(Hole 1) 3 36.9 41.8 21.3 4.6 59.5 1.5 12.7 .4 21.3 10,420
4 46.9 53.1 5.8 75.6 2.0 16.1 .5 13,240
1 9.5 30.9 33.2 26.4 4.9 48.0 1.2 19.2 .3 26.4 8,400 2,330 2,620 2,840 1.61
D-74891 2 12.1 30.0 32.2 25.7 5.0 46.7 1.2 21.1 .3 25.7 8,160
(Hole 1) 3 34.1 36.7 29.2 4.2 53.1 1.4 11.8 .3 29.2 9,280
4 48.2 51.8 5.9 75.0 1.9 16.8 .4 13,100
1
D-99651 2 10.2 30.9 38.1 20.8 .2 9,140 2,570 2,690 2,890
(Hole 2) 3 34.5 42.3 23.2 .3 10,180
4 44.8 55.2 ___.3 13,250
1/
2/
3/
Pittsburgh laboratory number; see table FoLlowing ana logs tor description
1, Air-dried; 2, as received; 3, moisture-free; 4, moisture- and ash-free.
Determined by modified method.
ot samples.
Description of drill-core samples, Houston project:
Lab. No. D-74890: Hole 1; core logged 27 feet 3 inches to 30 feet 3 inches; core received 32 inches;.
3-3/4 inches bone rejected; 4 inches coal loss in drilling; 28-1/4 inches coal in this sample.
Lab. No. D-74891: Hole 1; core logged 33 feet 1 inch to 35 feet 8 inches; core received 30 inches;
6-1/2 inches bone rejected, 1 inch bone loss in drilling; 23-1/2 inches coal in this sample.
Lab. No. D-99651: Hole 2; core logged 437 feet 6-1/2 inches to 441 feet 0 inch; core received 41-1/2
inches; 8-1/2 inches bone rejected; 33 inches coal in this sample.
Ft.
Del
From-
0
.,
11
22
23
27
27
30
30
30
31
31
32
32
33
0
12
As a basis for calculating tons of coal in place, the common factor for Alaskan
subbituminous coals is 1 ton of mined raw coal (plant feed) per cubic yard in place
in the mine. Two beds known to average 42 inches and more are the "pit" bed and a
bed lying approximately 250 feet (stratigraphically) below. Other beds are simply
grouped in the category "14 inches and more"; 2 of these may be 42 or more inches
thick; however, the minability of the beds should not be inferred without more
thorough investigation. On the above basis, the total amount of coal in the drilled
area is estimated to be as follows:
Tons in place
Pit bed, average 5 ft. of coal .................... 2,580,000
250 bed, average 4 ft. of coal.................... 2,000,000
Otheri/, average total, 19 ft., 6 in. .............. 10000000
Total .... .................................. 14,580,000
1/ Appearance and specific gravity comparable to pit product.
Study of the drilling logs, projection of the limited geologic evidence, and
consolidation of known historical evidence in this locality indicates that investi-
gation to the southeast for 1/2 to 1 mile might expose strippable beds amenable to
more economical mining. As noted in the logs and elsewhere in this report, a con-
siderable quantity of gas was encountered at a well-defined horizon in holes 1 and
2. Study of this phenomenon was beyond the scope of this investigation. The gas
was predominantly methane.
APPENDIX
Log, Drill Hole 1
Location: 832.5 feet S. and 1,080 feet W. of NE. corner, sec.
Seward Meridian, Houston, Alaska.
20, T. 18 N., R. 3 W.,
Elevation: Collar of hole -303 feet.
In.
0
9
1
3
4%
3
9
6
9
2%
4
1
Ft.
)th
To-
11
22
23
27
27
30
30
30
31
31
32
32
33
35
In.
0
9
1
3
4%
3
9
6
9
2%
4
1
12
Clay overburden.
; Material
Interbedded fine sandstone and
silty claystone.
Ironstone.
Interlaminated fine sandstone
and silty claystone.
Bone.
COAL, dull; thin anthraxylon
bands and lenses.
Bone.
Ft.
11
Thickness
11
4
2
1
0
In.
9
4
2
1%
84
2'
6
9
3
51
1%
9
11%
t
Remarks
Thin glacial cover
previously stripped.
Roof, "Pit" bed.
Core loss, 4 in.
Core loss, 7 in.
Shale, dark gray, coaly streaks
Claystone, dark gray, coaly I
Shale, dark gray, carbonaceous.
COAL, dull, thin anthraxylon
lenses.
Shale, dark gray, carbonaceous.
Claystone, coaly.
COAL, dull; thin anthraxylon
streaks and lenses.
Ft.
35
35
35
38
39
43
46
47
49
52
52
53
53
75
From-
77
80
81
82
86
86
87
90
92
99
109
242
243
258
296
300
302
312
322
323
332
Depth
Y2
3
8
0
4
7
8
0
2
2
5
3
8
2
In.
13
Hole 1 (Con.)
35
35
38
39
43
46
47
49
52
52
53
53
75
77
Ft.
To-
80
81
82
86
86
87
90
92
99
109
242
243
258
296
300
302
312
322
323
332
333
In.
3
8
0
4
7
8
0
2
2
5
3
8
2
2
10
8
1
2
5
9
5
1
6
6
0
9
9
9
5
6
8
11
7
2
10
Bone, broken.
Bone.
Claystone, fel
Claystone, co.
Clays tone.
Claystone, si
Ironstone.
Claystone.
Claystone, si
Ironstone, coI
Claystone, si
Bone.
Claystone, si.
Sandstone, me,
upper and lot
Claystone, si:
Sandstone, sit
Claystone, si'
Sandstone, si:
Claystone, si:
Sandstone, si:
Claystone.
Claystone, si:
Ity.
dium, grading
wer strata.
lty.
lty.
Ity.
lty.
lty.
Ity.
Material.., ,,,, .]
w coaly streaks.
aly.
lty streaks.
lty streaks.
ncretionary.
lty.
into
Ity; sandy streak.
0
Ft.
and coal fragments.
Claystone, silty; occasional
coaly fragments
Sandstone, clayey matrix.
Sandstone, soft, medium to
fine, containing multiple beds
2
1
4
3
2
3
21
2
3
4
1
2
1
7
10
132
1
15
38
3
2
10
10
8
1
Thicknes
In.
5
4
4
3
1
4
2
0
3
10
5
6
0
4
of hard pebbles (quartz, chert
rhyolite, felsite, basalt) and
occasional coal fragments.
Claystone, bone streaks.
Claystone, silty
Interbedded fine sandstone,
siltstone, and claystone;
occasional coaly streaks.
Claystone, coaly; many bright-
coal bands.
Claystone, coaly; few bright-
coal bands up to 1 in. thick.
Interbedded claystone and silt-
stone; occasional coaly
fragments.
Siltstone, sandy streaks.
Claystone, coaly.
Interbedded siltstone and
fine sandstone.
Interbedded siltstone and
claystone.
Remarks
Core loss, 1 in.
Floor, "Pit" bed.
Bedding almost hori-
zontal; infrequent
crossbedding.
Core loss, 2 ft. 5 in.
Core loss, 111 ft.
Core loss, 2 ft.
Core loss, 1 ft.
Core loss, 2 in.
U
Ft.
333
334
334
335
336
341
341
342
345
351
353
353
372
376
387
387
388
393
394
402
403
435
453
456
471
De
From-
In.
-L
10
5
9
2
14
Hole 1 (Con.)
Ft.
334
334
335
336
341
341
342
345
351
353
353
372
376
387
387
388
393
394
402
403
435
453
456
471
481
)tn-
To-
In.
5
9
2
0
Material
Siltstone.
Shale, soft, dark.
Claystone.
Shale, soft, dark, occasional
coal fragments.
Interbedded siltstone and fine
sandstone.
Sandstone, soft.
Interbedded siltstone and fine
sandstone.
Sandstone, soft.
Interbedded siltstone and
claystone.
Claystone, soft, dark.
Siltstone.
Interbedded claystone, silt-
stone, and fine sandstone.
Sandstone, soft.
Interbedded claystone and
shale, silty streaks.
COAL, hard, bright; conchoidal
fracture.
Claystone, coaly.
Claystone, silty streaks.
COAL, hard, bright, bony
streaks.
Interbedded claystone and
siltstone.
Sandstone, medium fine.
Sandstone, medium fine; soft
layers and occasional coaly
Ft.
Thickness
.-- .... ... .
0
5
2
6
1
18
4
10
1
5
7
1
32
17
3
14
10
7
4
5
10
2
7
6
11
3
7
6
6
9
9
1
1
0
8
9
3
6
6
0
9
6
In.Remarks
Core loss, 6 in.
4
10
10
4
4
1
4
4
1
7
streaks.
Sandstone,
bands.
Sandstone,
Sandstone,
cemented.
soft, few pebble
soft, medium fine.
porous, poorly
Core loss, 16 ft. 2 in.
Core loss, 8 ft. 9 in.
Gas flow accompanied by
brackish water, static
pressure in excess of
15 lb. per sq. in.
Bedding remains almost
horizontal; little dis-
tortion evident.
l
Sandstone, alternating soft
and dense, pebble bands, bot-
tom of hole in hard, fine
sandstone.
-^--.--
Ft.
0
19
21
21
From-
33
80
105
106
115
116
126
129
173
175
176
181
182
183
184
186
186
204
205
241
244
260
310
313
Deoth
15
Log, Drill Hole 2
Location: 710 feet S. and 2,150 feet E. of NW. corner, sec. 20, T. 18 N., R. 3 W.,
Seward Meridian, Houston, Alaska.
Elevation: Collar of hole -330 feet.
0
0
6
11
In.
19
21
Ft.
21
33
80
105
106
115
116
126
129
173
V
4
175
176
181
182
183
184
186
186
204
205
241
244
260
310
313
320
Tn-
In.
0
6
11
6
0
2
0
9
3
2
0
3
1
7
9
3
7
9
4
11
5
2
2
2
9
3
4
9
Material
Overburden, soil and gravel.
Sandstone, medium coarse; iron
stains.
Shale, carbonaceous.
Interbedded silty claystone
and siltstone.
Sandstone, soft, occasional
pebble bands and coaly
streaks.
Claystone, occasional iron-
stone nodules, coal fragments.
Siltstone, dense
Claystone.
Siltstone, dense.
Claystone.
Claystone, coaly, frequent
coal bands.
Interbedded claystone, silt-
stone, and very fine sand-
stone; occasional pebbles and
coaly streaks.
Interbedded bony coal and coaly
claystone.
COAL, dull; bony streaks.
Claystone; coal streaks and
fragments.
Claystone, coaly.
COAL, dull; bony streaks.
Shale, dark, coal streaks.
Claystone.
Claystone, coal streaks.
Claystone, siltstone bands,
and very fine sandstone bands.
Shale, dark; coal streaks.
Interbedded claystone, silt-
stone and very fine sandstone.
Sandstone, soft.
Claystone, silty; few sandy
streaks.
Sandstone, soft, occasional
pebble bands.
Conglomerate, pebble; soft
sandstone matrix.
Sandstone, soft to dense.
Thickness
Ft.
19
2
11
46
25
9
9
2
44
1
1
5
1
1
1
17
36
3
16
49
3
7
In.
5
7
6
2
10
9
6
11
10
3
10
6
2
6
4
2
7
7
6
9
0
0
7
6
1
5
0
6
Bedding, where seen,
almost horizontal.
Core broken, pseudo-
coal bed.
Roof, "Pit" bed.
Floor, "Pit" bed.
Core loss, 2 ft. 3 in.
Remarks
3
4
Ft.
Ue
From-
320
340
342
372
-.1.
3 76
383
399
412
432
435
435
435
436
437
437
438
438
440
440
441
441
445
461
461
461
462
462
463
477
484
508
509
511
16
Hole 2 (Con.)
7
9
In.
10
6
11
7
0
4
2%
4
9
10%
1X
6%
/2
3
2
8
0
3
7
3
9
11
1
11
8
0
0
1
10
5
342
372
376
383
399
412
432
435
435
435
436
437
437
438
438
440
440
441
441
445
461
461
461
462
462
463
477
484
508
509
511
511
To-To-
Ft.
340
11
7
10
7
0
4
2%
4
9
10l
1%
6%
3
2
8
0
3
7
3
9
11
1
11
8
0
0
1
10
5
8
6
In.
Sandstone, dense; rew peDbbes
and cobbles.
Conglomerate, pebble, in soft
sandstone matrix.
Claystone, silty bands,
occasional ironstone concre-
tions and coaly streaks.
Sandstone, soft, fine to
medium.
Claystone to silty claystone,
occasional ironstone con-
cretions.
Claystone, carbonaceous; coal
fragments.
Sandstone, soft; few pebbles | 19
and occasional claystone bands
and coaly fragments.
Sandstone, soft. 2
Conglomerate, pebble and 29
cobble, soft sandstone matrix.
Material Ft.
COAL.
Siltstone.
Bone.
COAL.
Bone.
COAL.
Bone.
Bone, coal streaks.
Bone.
COAL.
Bone.
Claystone, coal streaks.
Interbedded claystone, silt-
stone, and very fine sand-
stone.
Sandstone.
Claystone.
Sandstone, soft.
Claystone.
Claystone, coaly.
Claystone, occasional sandy
streaks.
Sandstone, crossbedded, fine
medium, few clay streaks.
Claystone to silty claystone.
Sandstone, soft.
Claystone.
Claystone, coaly.
4
6
15
13
19
3
9
In.
Thickness
1
1
4
15
13
7
24
1
1
5
8
3
9
5
4
5
1%
2¼<
5
6
2%
11
6
4
3
4
8
6
2
2
10
9
4
0
1
9
7
3
Remarks
Bedding where seen
nearly horizontal.
Core loss, 2 ft.
Roof of bed corres-
ponding to log, hole
1, 296 ft. 9 in. to
302 ft. 6 in.
Floor.
Bedding nearly flat.
to
Ft.
From-
I
Depth
*
511
533
533
543
545
571
605
610
648
652
666
675
692
697
726
728
729
730
733
735
740
742
744
753
805
832
|In.
17
Hole 2 (Con.)
0
8
0
3
11
0
4
4
10
3
0
0
0
3
2
7
11
7
7
7
8
6
3
11
8
To-
533
533
543
545
571
605
610
648
652
666
675
692
697
726
728
729
730
733
735
740
742
744
753
805
832
837
Ft.
0
8
0
In.
3
11
0
4
4
10
3
0
0
0
3
2
7
11
7
7
7
8
6
3
11
Material
Claystone and fine sandstone,
interbedded and crossbedded.
COAL, bony.
Interbedded claystone and fine
sandstone.
_ _ _ _ -
Sandstone.
Conglomerate, pebble to
soft sandstone matrix.
Sandstone, soft.
Conglomerate, pebble to
soft sandstone matrix.
Thickness
banasUone, claystone incluslons
Sandstone, dense; calcite-
filled fractures.
Conglomerate, soft matrix.
Dense sandstone, coaly
fragments.
Conglomerate, soft matrix.
Claystone, silty.
Claystone, silty; few bands of
fine sandstone and occasional
ironstone concretions and
coaly streaks.
Claystone, coaly.
Claystone.
Claystone, coaly.
Interbedded claystone and fine
sandstone.
Claystone, coal streaks.
Claystone, sandy streaks, and
lenses.
26
cobble, 33
5
cobble, 38
21
9
.2
Ft.
4
13
8
17
5
29
1
1
1
2
2
5
In.
8
4
3
8
1
4
0
6
5
9
0
0
3
11
5
4
8
0
0
1
10
9
8
10
3
4
Remarks
Transition.
Bedding 15°, brackish
water with evident
gas pressure.
Core loss, 28 ft. 8 in.
Core loss, 2 ft. 1 in.
Core loss, 30 ft. 9 in.
Slickensides.
Core loss, 12 ft. 11 in.
Core loss, 7 ft. 1 in.
Core loss, 12 ft. 9 in.
Core loss, 7 in. Gas and
water increasing down
to this stratum. Static
pressure up to 45 lb.
Another gas channel
apparent at 775 ft.;
not measurable.
I
f Sandstone, fine to medium cross- 2
bedded; coaly streaks and
occasional included pebbles.
Claystone, coaly. 1
Interbedded claystone and fine 8
sandstone.
Sandstone, fine to medium and 52
dense to porous, occasional
claystone blebs, and pebble
band at 794 ft.
Claystone, silty and sandy 26
streaks.
Sandstone, soft; claystone and 4
coaly streaks.
9
09
Ft.
837
840
843
847
848
850
876
876
880
895
897
Frnm-
903
906
913
917
937
943
979
985
985
986
987
987
988
988
1,013
1,044
Depth
U
9
3
18
Hole 2 (Con.)
10
3
8
0
6
8
8
10
IIn.
840
843
847
848
850
876
876
880
895
897
903
Ft.
906
913
917
937
943
979
985
985
986
987
987
988
988
1,013
1,044
1,072
3
8
0
6
8
8
In.
9
3
10
8
To-
10
Material
Claystone, sandy and coaly
streaks.
Claystone, coaly; many bright
coal bands.
Sandstone, soft; occasional
claystone streaks.
Claystone.
Claystone, dark; bright coal
streaks.
Interbedded claystone and silt-
stone.
Sandstone, crossbedded;
streaks of iron carbonate.
Claystone, dark; occasional
coal streaks.
Interbedded claystone and
silty claystone.
Sandstone, fine, dense.
Interbedded claystone and
siltstone.
Claystone, coaly.
Interbedded claystone, silt-
stone, and fine sandstone.
Claystone, coaly; bright
streaks.
Interbedded claystone and silt-
stone; occasional ironstone
concretions.
Claystone, coaly; many bright
coal bands and streaks.
Interbedded claystone, silt-
stone, and fine sandstone;
occasional ironstone con-
cretions.
Sandstone.
COAL, bony and bright.
Claystone, coaly.
COAL, bright.
COAL, bony and bright.
COAL.
Claystone, coaly.
Interbedded claystone and silt-
stone; 3-ft. zone of ironstone
concretions at 994 ft.
Sandstone, fine to medium;
occasional claystone streaks.
Sandstone; frequent conglom-
erate lenses of indeterminate
thickness.
3
Chickness
2
4
2
25
4
15
2
5
2
7
4
19
6
35
6
1
25
30
27
Ft.In.
6
7
5
5
4
6
2
0
2
10
5
5
2
11
0
5
0
9
5
0
3
8
5
2
10
6
9
Remarks
I
Tv
Bedding of all above
strata varies from 0°
to 15°.i
Core mangled; no loss.
C
43
48
5C
51
53
53
53
55
58
60
87
87
90
96
97
I
0
6
6
5
11
2
5
7
0
7
4
6
9
10
11
6
48
50
51
53
53
53
55
58
60
87
87
90
96
97
103
103
122
123
125
126
126
126
19
Hole 2 (Con.)
I
t
De th ..
From- To- Thickness
Ft. In. Ft. In. Material Ft. In. Remarks
1,072 0 1,097 1 Interbedded claystone and 25 1
silty claystone.
1,097 1 1,105 10 Claystone, dark; frequent 8 9
bright-coal streaks and
scattered sandstone con-
cretions.
1,105 10 1,106 2 Claystone. 4
1,106 2 1,112 3 Interbedded claystone, silt- 6 1
stone, and fine sandstone.
1,112 3 1,142 0 Sandstone, occasional clay- 29 9
_ stone streaks.
Log, Drill Hole 3
Location: 920 feet N. and 265 feet W. of SE. corner, sec. 18, T. 18 N., R. 3 W.,
Seward Meridian, Houston, Alaska.
Elevation: Collar of hole -249 feet.
.43 -i,,, -.-43
6
5
11
2
5
7
0
7
4
6
9
10
11
6
0
11
4
6 Overburden, glacial sand,
gravel, and boulders.
Sandstone, dense, few included
pebbles and cobbles.
Claystone.
Claystone, soft.
Shale, dark.
Claystone, coaly.
Claystone, coaly streaks.
Claystone, coaly.
Claystone, dark, silty;
occasional coaly streaks.
COAL, bony.
Interbedded claystone, silty
claystone and siltstone.
Sandstone.
Claystone.
Sandstone, porous, fine to
medium, frequent clay bands.
Sandstone, dense, fine.
Claystone, silty, grading down
to siltstone.
COAL, bony.
Interbedded claystone and
silty claystone; occasional
sandy streaks.
Shale, carbonaceous.
Claystone.
Claystone, coaly.
Claystone.
Claystone, coaly.
1
3
1
27
3
6
5
18
2
43
5
1
1
1
6
0
11
6
3
3
2
5
7
9
2
3
1
1
7
6
11
5
8
2
10
1
5
Core loss, 3 ft. 4 in.
Core loss, 9 in.
Core loss, 1 ft., 2 in.
103
103
122
123
125
126
126
0
11
4
0
2
0
1
0
2
0
1
6
Ft.
126
127
127
133
142
145
177
181
182
196
199
217
224
233
236
243
244
244
256
258
260
333
337
From-
In.
Depth
6
0
11
5
10
8
3
Ft.
20
Hole 3 (Con.)
127
127
133
1
To-
42
145
177
181
182
196
199
217
224
233
236
243
244
244
256
258
260
333
337
386
In.
0
11
5
10
Claystone.
Claystone, coaly.
Claystone, dark; frequent coal
streaks.
Claystone to silty claystone,
occasional coaly fragments.
Interbedded coaly claystone
and carbonaceous shale.
Interbedded claystone, silty
claystone, and very fine
sandstone.
Interbedded claystone and
soft, porous sandstone.
Claystone, coaly.
Claystone, frequent silty and
coaly streaks.
Claystone, coaly.
Claystone, occasional silty
streaks.
Sandstone, fine.
Claystone.
Claystone, coaly.
Claystone, occasional thin
coaly streaks.
COAL, bony.
Shale, carbonaceous.
Claystone, occasional coaly
fragments and ironstone
nodules.
Claystone, coaly.
Shale, dark; few thin coaly
streaks.
Interbedded claystone, silt-
stone, and very fine sand-
stone.
Sandstone, soft.
Sandstone, soft, few pebbles
included.
ly
IThickness
5
9
2
31
4
13
3
18
6
9
3
6
1
11
2
1
72
3
49
Material Ft.
0 6
11
6
In.Remarks
Core loss, 1 ft.
Core loss, 1 ft. 2 in.
Core loss, 42 ft.
Bedding throughout is
0° to 150, with mod-
erate crossbedding.
Regular bedding seldom
exceeds 5°.
.-..--.---.I ..
INT. BU.OF MINES.PGH* ,rA .8485
lc-apfm
10j an95
PLUGGING & LOCATION CLEARANCE
REPORT
State of Alaska ALASKA OIL & GAS CONSERVATION COMMISSION
PTD No. do -oOoe
Lease ?
Memorandum To File: API No. 0o9 - f o0 22 - oc�
Well Name oc15.6 Core- (4o (R
Operator _C15 Gureo-C.'of- hd24
Location Se= 20. 7- / A (s . Fz 3 aj- -5 �
4
Abnd Date
Spud: TD: r, Completed Ci i o/erg
Note casing size, wt, depth, cmt vol, & procedure.
Sfc Csg:
Long Csg:
Liner:
Perf intervals - tops:
Review the well file, and comment on plugging, well head
status, and location clearance - provide loc. clear. code.
Plugs:
Well head cut off:
Marker post or plate:
Location Clearance:
Conclusions: l .SrO
Code ``
Signed
Date �271g�
Log, hole 1
Location: 1,665 feet S. and 2,160 feet W. of NE. corner Sec. 20, T. 18 N.,
R. 3 W., Seward Meridian, Houston, Alaska.
Elevation: Collar of hole - 303 feet.
Depthw"
From- To- Thickness
Ft. in. Ft. in. Material Ft. in. Remarks
0 0 11 0 Clay overburden 31 0 Thin glacial cover
previously stripped.
11 0 22
22 9 23
23 1 27
27 3 27
27 41 30
30 0-3/4 30
30 3 30
30 9 31
31 6 31
31 9 32
32
22
32
32
4
33
33
1
35
35
0-
35
35
3
35
35
8
38
38
0
39
39
4
43
43
7
46
46
8
47
47
0
49
49
2
52
52
2
52
52
5
53
53
3
53
53
8
75
75
2
77
77
2
80
80
10
81
81
8
82
82
1
86
86
2
86
86
5
87
87
9
90
90
5
92
9
Interbedded fine sandstone
and silty claystone
11
9
1
Ironstone
0
4
3
Interlaminated fine sandstone,
siltstone and silty claystone
4
2
Roof, "Pit" bed.
42
Bone
0
12
0-3/4
COAL, dull with thin anthraxylon
bands and lenses
2
8u
Core loss, 4 in.
3
Bone
0
2,i-,
9
Shale, dark gray, coaly streaks
0
6
6
Claystone, dark gray, coaly
0
9
Core loss, 7 in.
9
Shale, dark gray, carbonaceous
0
3
22
COAL, dull, thin anthraxylon
lenses
0
5
4
Shale, dark gray, carbonaceous
0
12
1
Claystone, coaly
0
9
02
COAL, dull with thin anthraxylon
streaks and lenses
1
11
3
Bone, broken
0
22
Care loss, 1 in.
8
Bone
0
5
0
Claystone, few coaly streaks
2
4
Floor, "Pit" bed.
4
Claystone, coaly
1
4
7
Claystone
4
3
8
Claystone, silty streaks
3
1
0
Ironstone
0
4
2
Claystone
2
2
2
Claystone, silty streaks
3
0
5
Ironstone, concretionary
0
3
3
Claystone, silty
0
10
8
Bone
0
5
2
Claystone, silty
21
6
Bedding is almost
2
Sandstone, medium, grading into
horizontal, with
upper and lower strata
2
0
infrequent cross -
10
Claystone, silty
3
8
bedding.
8
Sandstone, silty
0
10
1
Claystone, silty
0
5
2
Sandstone, silty
4
1
5
Claystone, silty
0
3
9
Sandstone, silty
1
4
5
Claystone
2
8
1
Claystone, silty, with sandy
streaks and coal fragments
1
8
i0U-p0�f , 100-cogi 100 -OI b
1 0 0
Log, hole 1 (Cont.)
Remarks
Core loss 2 ft. 5 in.
Core loss 111 ft.
Core loss 2 ft. 0 in.
Core loss 1 ft. 0 in.
Core loss 2 in.
Core loss 6 in.
Depth
From-
To-
Thickness
Ft.
in.
Ft.
in.
Material Ft.
in.
92
1
99
6
Claystone, silty, with
occasional coaly fragments
7
5
99
6
109
6
Sandstone, clayey matrix
10
0
109
6
242
0
Sandstone, soft, medium to
fine, containing multiple beds
of hard pebbles (quartz, chert,
rhyolite, felsite, basalt) and
occasional coal fragments
132
6
242
0
243
9
Claystone, bone streaks
1
9
243
9
258
9
Claystone, silty
15
0
258
9
296
9
Interbedded fine sandstone,
siltstone and claystone with
occasional coaly streaks
38
0
296
9
300
5
Claystone, coaly, with many
bright coal bands
3
8
300
5
302
6
Claystone, coaly, with few
bright coal bands up to 1 in.
thick
2
1
302
6
312
8
Interbedded claystone and
siltstone) with occasional
coaly fragments
10
2
312
8
322
ll
Siltstone, sandy streaks
100
38
322
11
323
7
Claystone, coaly
323
7
332
2
Interbedded siltstone and
rine sandstone
8
7
332
2
333
10
Interbedded siltstone and
claystone
1
8
333
10
334
5
siltstone
0
7
334
5
334
9
Shale, soft, dark
0
4
334
9
335
2
Claystone
0
5
335
2
336
0
Shale, soft, dark, occasional
coal fragments
0
10
336
0
341
2
Interbedded siltstone and
fine sandstone
5
2
341
2
341
9
Sandstone, soft
0
7
341
9
342
3
Interbedded siltstone and
fine sandstone
o
6
3�+2
3
345
2
Sandstone, soft
2
11
345
2
351
5
Interbedded siltstone_and
_
claystone
6
3
351
5
353
0
Claystone, soft, dark
353
0
353
6
Siltstone
0
67
353
6
372
0
Interbedded claystone,
siltstone and fine sandstone
18
6
372
0
376
9
Sandstone, soft
4
9
376
9
367
6
Interbedded claystone and
shale, silty streaks
10
9
387
6
387
7
COAL, hard, bright, with
conchoidal fracture
0
1
Remarks
Core loss 2 ft. 5 in.
Core loss 111 ft.
Core loss 2 ft. 0 in.
Core loss 1 ft. 0 in.
Core loss 2 in.
Core loss 6 in.
Log, hole 1 (Cont.)
471 1 481 7
Sandstone, alternating soft
and dense, pebble bands -
bottom of hole in hard, fine
sandstone
Log, hole_ 2
Remarks
2
Core loss 16 ft. 2 in.
Core loss 8 ft. 9 in.
Gas flow accompanied
by brackish water -
static pressure in
excess of 15 lbs.
per sq. in.
10 6 Bedding remains al-
most horizontal -
little distortion
evident.
Location: 710 feet S. and 2,150 feet E. of NW. corner Sec. 20, T. 18 N.,
Depth
W.,
Seward Meridian, Houston, Alaska.
From-
Collar of hole - 330 feet.
To
Thickness
Ft.
in.
Ft.
in.
Material
Ft.
in.
387
7
388
8
Claystone, coaly
1
1
388
8
393
8
Claystone, silty streaks
5
0
393
8
394
4
COAL, hard, bright, with
0
21
6
Sandstone, medium -coarse,
bony streaks
0
8
394
4
W2
1
Interbedded claystone and
6
21
U
Shale, carbonaceous
0
5
siltstone
7
9
X02
1
403
4
Sandstone, medium -fine
1
3
x+03
4
435
10
Sandstone, medium fine, with
6
80
0
Sandstone, soft, occasional
soft layers and occasional
pebble bands and coaly
coaly streaks
32
6
435
10
453
4
Sandstone, soft, with few
almost horizontal.
pebble bands
17
6
453
4
456
4
Sandstone, soft, medium -fine
3
0
456
4
471
1
Sandstone, porous, poorly
cemented
14
9
471 1 481 7
Sandstone, alternating soft
and dense, pebble bands -
bottom of hole in hard, fine
sandstone
Log, hole_ 2
Remarks
2
Core loss 16 ft. 2 in.
Core loss 8 ft. 9 in.
Gas flow accompanied
by brackish water -
static pressure in
excess of 15 lbs.
per sq. in.
10 6 Bedding remains al-
most horizontal -
little distortion
evident.
Location: 710 feet S. and 2,150 feet E. of NW. corner Sec. 20, T. 18 N.,
R. 3
W.,
Seward Meridian, Houston, Alaska.
Elevation:
Collar of hole - 330 feet.
Depth
From--
To-
Tbickness
Ft.
in,
Ft.
in.
Material
Ft.
in. Remarks
0
0
19
0
Overburden, soil and gravel
19
0
19
0
21
6
Sandstone, medium -coarse,
with iron stains
2
6
21
6
21
U
Shale, carbonaceous
0
5
21
11
33
6
Interbedded silty claystone
and siltstone
11
7
33
6
80
0
Sandstone, soft, occasional
pebble bands and coaly
streaks
46
6 Bedding, where seen,
almost horizontal.
80
0
105
2
Claystone, occasional iron-
stone nodules, coal fragments
25
2
Log, hole 2 (Cont.)
Depth
From-
To-
Thickness
Ft.
in.
Ft.
in.
Material
Ft.
in.
Remarks
105
2
106
0
Siltstone, dense
0
10
106
0
115
9
Claystone
9
9
115
9
116
3
Siltstone, dense
0
6
116
3
126
2
Claystone
9
11
126
2
129
0
Claystone, coaly, frequent
coal bands
2
10
Core broken, pseudo -
coal bed.
129
0
173
3
Interbedded claystone,
siltstone and very fine
sandstone, with occasional
pebbles and coaly streaks
44
3
Roof, "Pit" bed.
173
3
175
1
Interbedded bony coal and
coaly claystone
1
10
175
1
176
7
COAL, dull with bony streaks
1
6
176
7
181
9
Claystone, with coal streaks
and fragments
5
2
181
9
182
3
Claystone, coaly,
0
6
182
3
183
7
COAL, dull with bony streaks
1
4
183
7
184
9
Shale, dark, coal streaks
1
2
Floor, "Pit" bed.
184
9
186
4
Claystone
1
7
186
4
186
11
Claystone, coal streaks
0
7
186
ll
204
5
Claystone, siltstone bands
and very fine sandstone
bands
17
6
204
5
205
2
Shale, dark, with coal
streaks
0
9
205
2
241
2
Interbedded claystone,
siltstone and very fine
sandstone
36
0
241
2
244
2
Sandstone, soft
3
0
244
2
260
9
Claystone, silty with few
sandy streaks
16
7
260
9
310
3
Sandstone, soft, occasional
pebble bands
49
6
310
3
313
4
Conglomerate, pebble with
soft sar e stone matrix
3
1
Core loss 2 ft. 3 in.
313
4
320
9
Sandstone, soft to dense
7
5
320
9
340
6
Sandstone, soft, with few
pebbles and occasional
claystone bands and coaly
fragments
19
9
340
6
342
11
Sandstone, soft
2
5
342
11
372
7
Conglomerate, pebble and
cobble, soft sandstone matrix
29
8
372
7
376
10
Sandstone, dense with few
pebbles and cobbles
4
3
Bedding, where seen,
nearly horizontal
376
10
383
7
Conglomerate, pebble, in
soft sandstone matrix
6
9
Depth
From- To -
Ft. in. Ft. in.
383 7 399 0
399 0 412 4
412 4 432 22
432 22 435 4
0
Log, hole 2 (Cont.)
Material
Claystone, silty bands,
occasional ironstone
concretions and coaly streaks
Sandstone, soft fine to
medium
Claystone to silty claystone,
occasional ironstone
concretions
Claystone, carbonaceous,
with coal fragments
435
4
435
9
COAL
435
9
435
1021
Siltstone
435
102
436
0-3/4
Bone
436
0-3/4437
11
COAL
437
11
437
6?
Bone
437
6-
438
02
COAL
438
02
438
3
Bone
438
3
440
2
Bone with coal streaks
440
2
440
8
Bone
440
8
441
0
COAL
441
0
441
3
Bone
441
3
445
7
Claystone, coal streaks
445
7
461
3-
Interbedded claystone,
siltstone and very fine
sandstone
461
3
461
9
Sandstone
461
9
461
11
Claystone
461
11
462
1
Sandstone, soft
462
1
462
11
Claystone
462
11
463
8
Claystone, coaly
463
8
477
0
Claystone, occasional sandy
streaks
477
0
484
0
Sandstone, cross -bedded,
fine to medium, few clay
streaks
484
0
508
1
Claystone to silty claystone
508
1
509
10
Sandstone, soft
509
10
511
5
Claystone
511
5
511
8
Claystone, coaly
511
8
533
0
Claystone and fine sandstone,
interbedded and cross -bedded
533
0
533
8
COAL, bony
533
8
543
0
Interbedded claystone and
fine sandstone
543
0
545
3
Sandstone, claystone
inclusions
•
Thickness
Ft. in. Remarks
15 5
13 4 Core loss 2 ft. 0 in.
19 102
3 12 Roof of bed corres-
ponding to log, hole 1,
296 ft. 9 in. to
302 ft. 6 in.
0 5
0 12
0 241
1 0-3/4
0 5
o 6
0 2f
1 11
o 6
0 4
0 3
4 4 Floor
15 8
o 6
0 2
0 2
0 10
0 9
13 4 Bedding nearly flat.
7 0
24 1
1 9
1 7
0 3
21 4
o 8
9 4
2 3 Transition
•
Log, hole 2 (Cont.)
•
Depth
From- To- Thickness
Ft. in. Ft. in. Material Ft, in. Remarks
545 3 571 11 Sandstone 26 8 Bedding 15 degrees.
Brackish water with
evident gas pressure.
571
11
605
0
Conglomerate, pebble to
cobble, soft sandstone
33
1
Core loss 28 ft.8. in.
matrix
605
0
610
4
Sandstone, soft
5
4
Core loss 2 ft. 1 in.
610
4
648
4
Conglomerate, pebble to
cobble, soft sandstone
matrix
38
0
Core loss 30 ft.9 in.
648
4
652
10
Sandstone, dense, with
calcite -filled fractures
4
6
Slickensides
652
10
666
3
Conglomerate, soft matrix
13
5
Core loss 12 ft.11 in.
666
3
675
0
Dense sandstone with coaly
fragments
8
9
Core loss 7 ft. 1 in.
675
0
692
0
Conglomerate, soft matrix
17
0
Core loss 12 ft -9 in.
692
0
697
0
Claystone, silty
5
0
Core loss 0 ft. 7 in.
Gas and water increas-
ing down to this
stratum. Static pres-
sure up to 45 pounds.
697
0
726
3
Claystone, silty, with few
bands of fine sandstone and
occasional ironstone con-
cretions and coaly streaks
29
3
726
3
728
2
Claystone, coaly
1
11
728
2
729
7
Claystone
1
5
729
7
730
11
Claystone, coaly
1
4
730
11
?33
7
Interbedded claystone and
fine sandstone
2
8
733
7
735
7
Claystone, coal streaks
2
0
735
7
740
7
Claystone, sandy streaks
and lenses
5
0
740
7
742
8
Sandstone, fine to medium,
cross -bedded, with coaly
streaks and occasional
included pebbles
2
1
742
8
744
6
Claystone, coaly
1
10
744
6
753
3
Interbedded claystone and
fine sandstone
8
9
753
3
805
11
Sandstone, fine to medium
and dense to porous, with
occasional claystone blebs,
and pebble band at 794 ft.
52
8
Anther gas channel
apparent at 775 ft.,
not measurable.
805
11
832
9
Claystone, silty and sandy
streaks
26
10
•
Log, hole 2 (Cont.)
•
Thickness
Ft. in.
4 3
3 9
2 6
4 7
0 5
2 5
25 4
o 6
4 2
15 0
2 2
5 to
2 5
7 5
4 2
19 11
6 o
Remarks
35 5 Bedding of all above
strata varies from 0
to 15 degrees
979
0
Depth
o
Sandstone
From-
985
To -
985
Ft.
in.
Ft.
in.
Material
832
9
837
0
Sandstone, soft, with
2
987
2
COAL, bright
claystone and coaly streaks
837
0
840
9
Claystone, sandy and coaly
0 3
987
5
988
streaks
840
9
843
3
Claystone, coaly, with many
6
Claystone, coaly
0 5
bright coal bands
843
3
847
10
Sandstone, soft, with
occasional claystone streaks
847
10
848
3
Claystone
848
3
85o
8
Claystone, dark, with bright
coal streaks
850
8
876
o
Interbedded claystone and
siltstone
876
o
876
6
Sandstone, cross -bedded,
with streaks of iron
carbonate
876
6
880
8
Claystone, dark, with
occasional coal streaks
880
8
895
8
Interbedded claystone and
silty claystone
895
8
897
10
Sandstone, fine, dense
897
10
903
8
Interbedded claystone and
siltstone
903
8
906
1
Claystone, coaly
906
1
913
6
Interbedded claystone,
siltstone and fine sandstone
913
6
917
8
Claystone, coaly, with
bright coal streaks
917
8
937
7
Interbedded claystone and
siltstone, with occasional
ironstone concretions
937
7
943
7
Claystone, coaly, with many
bright coal bands and streaks
943
7
979
0
Interbedded claystone, silt -
stone and fine sandstone,
with occasional ironstone
concretions
•
Thickness
Ft. in.
4 3
3 9
2 6
4 7
0 5
2 5
25 4
o 6
4 2
15 0
2 2
5 to
2 5
7 5
4 2
19 11
6 o
Remarks
35 5 Bedding of all above
strata varies from 0
to 15 degrees
979
0
985
o
Sandstone
6 o
985
0
985
9
COAL, bony and bright
0 9
985
9
986
2
Claystone, coaly
0 5
986
2
987
2
COAL, bright
1 0
987
2
987
5
COAL, bony and bright
0 3
987
5
988
1
COAL
0 8
988
1
988
6
Claystone, coaly
0 5
Depth
From- To -
Ft. in. Ft. in.
988 6 1013 8
1013 8 lo44 6
1044 6 1072 0
1072 0 1097 1
1097 1 1105 10
1105
10
1106 2
1106
2
1112 3
1112
3
1142 0
•
Log, hole 2 (Cont.)
Material
Interbedded claystone and
siltstone, with 3 ft. zone
of ironstone concretions
at 994 ft.
Sandstone, fine to medium,
occasional claystone
streaks
Sandstone with frequent
conglomerate lenses of
indeterminate thickness
Interbedded claystone and
silty claystone
Claystone, dark, with
frequent bright coal streaks
and scattered sandstone
concretions
Claystone
Interbedded claystone,
siltstone and fine sandstone
Sandstone, occasional
cla.ystoi)e streaks
Log, hole 3
Thickness
Ft. in.
25 2
30 10
Remarks
27 6 Core mangled, no loss.
25 1
8 9
o 4
6 1
29 9
Location: 920 feet N, and 265 feet W. of SE. corner. Sec. 18, T. 18 N.,
R. 3 W., Seward Meridian, Houston, Alaska
Elevation: Collar of hole - 249 feet.
Depth
From- To- Thickness
Ft.
in.
Ft.
in.
0
0
43
6
43
6
48
6
48 6
50 5
51 11
53 2
53 5
53 7
55 0
58 7
6o 4
50 5
51 11
53 2
53 5
53 7
55 0
58 7
6o 4
87 6
Material
Overburden, glacial sand,
gravel and boulders
Sandstone, dense, few
included pebbles and
cobbles
Claystone
Claystone, soft
Shale, dark
Claystone, coaly
Claystone, coaly streaks
Claystone, coaly
Claystone, dark, silty, with
occasional coaly streaks
COAL, bony
Interbedded claystone, silty
claystone and siltstone
Ft. in. Remarks
43 6
5 0 Core loss 3 ft. 4 in.
1 11 Core loss 9 in.
1 6 Core loss 1 ft. 2 in.
1 3
0 3
0 2
1 5
3 7
1 9
27 2
Depth
From-
0
To -
Ft.
in.
Ft.
in.
87
6
87
9
87
9
90
10
90
10
96
11
96
11
97
6
97
6
103
0
103
0
103
11
103
11
122
4
122 4 123 0
123
0
125
2
125
2
126
o
126
o
126
1
126
1
126
6
126
6
127
0
127
0
127
11
127
11
133
5
133
5
142
10
142
10
145
8
145
8
177
3
177 3 181 8
181
8
182 6
182
6
196 1
196
1
199 4
199
4
217 6
217
6
224 0
224
o
233 4
233
4
236 9
236
9
243 0
243
0
244 o
244
0
244 3
244
3
2_�6 1
256 1 258 8
258 8 26o 4
•
Log, hole 3 (Cont.)
Material
Sandstone
Claystone
Sandstone, porous, fine to
medium, frequent clay bands
Sandstone, dense, fine
Claystone, silty, grading
down to siltstone
COAL, bony
Interbedded claystone and
silty claystone, with
occasional sandy streaks
Shale, carbonaceous
Claystone
Claystone, coaly
Claystone
Claystone, coaly
Claystone
Claystone, coaly
Claystone, dark, with
frequent coaly streaks
Claystone to silty claystone,
occasional coaly fragments
Interbedded coaly claystone
and carbonaceous shale
Interbedded claystone, silty
claystone and very fine
sandstone
Interbedded claystone and
soft porous sandstone
Claystone, coaly
Claystone, frequent silty
and coaly streaks
Claystone, coaly
Claystone, occasional silty
streaks
Sandstone, fine
Claystone
Claystone, coaly
Claystone, occasional thin
coaly streaks
COAL, bony
Shale, carbonaceous
Claystone, occasional coaly
fragments and ironstone
nodules
Claystone, coaly
Shale, dark, with few thin
coaly streaks
0
Thickness
Ft. in.
0 3
3 1
6 1
0 7
5 6
0 11
18 5
o 8
2 2
0 10
0 1
0 5
o 6
0 11
5 6
9 5
2 10
Remarks
31 7
4 5 Core loss 1 ft.
0 10
13 7
3 3
18 2
6 6
9 4
3 5
6 3
1 0
0 3
11 10
2 7
1 8
Depth
From- To -
Ft. in. Ft. in.
260 4 333 1
333 1 337 0
337 0 386 o
•
Log, hole 3 (Cont.)
Material
Interbedded claystone,
siltstone and very fine
sandstone
Sandstone, soft
Sandstone, soft, few pebbles
included
•
Thickness
Ft. in. Remarks
72 9
3 11 Core loss 1 ft. 2 in.
49 0 Core loss 42 ft.
Bedding throughout is
0 to 15 degrees, with
moderate cross -
bedding. Regular
bedding seldom exceeds
5 degrees.
� i5 Sdutt a5 r\oSi�q,
Log, hole 1
Location: 1,665 feet S. and 2,160 feet W. of WE. corner Sec. 20, T. 18 N.,
R. 3 W., Seward Meridian, Houston, Alaska.
o
Elevation: Collar of hole - 303 feet.
Depth
From- To- Thickness
Ft. in. Ft. in. Material Ft. in. Remarks
0 0 11 0 Clay overburden 11 0 Thin glacial cover
previously stripped.
11
0
22
9
Interbedded fine sandstone
and silty claystone 11
9
22
9
23
1
Ironstone
0
4
23
1
27
3
Interlaminated fine sendstone,
siltstone and silty claystone
4
2
Roof, "Pit" bed.
27
3
27
4j
Bone
0
12
27
4
30
0-3/4
COAL, dull with thin anthraxylon
bands and lenses
2
81
Core loss, 4 in.
30
0-3/4
30
3
Bone
0
2
30
3
30
9
Shale, dark gray, coaly streaks
0
6
30
9
31
6
Claystone, dark gray, coaly
0
�9
Core loss, 7 in.
31
6
31
9
Shale, dark gray, carbonaceous
0
3
31
9
32
21
COAL, dull, thin anthraxylon
lenses
0
5T
32
21
32
4
Shale, dark gray, carbonaceous
0
12
32
4
33
1
Claystone, coaly
0
9
33
1
35
01
COAL, dull with thin anthraxylon
streaks and lenses
1
11
35
0a
35
3
Bone, broken
0
22
Core loss, l in.
35
3
35
8
Bone
0
5
35
8
38
0
Claystone, few coaly streaks
2
4
Floor, "Pit" bed.
38
0
39
4
Claystone, coaly
1
4
39
4
43
7
Claystone
4
3
43
7
46
8
Claystone, silty streaks
3
1
46
8
47
0
Ironstone
0
4
47
0
49
2
Claystone
2
2
49
2
52
2
Claystone, silty streaks
3
0
52
2
52
5
Ironstone, concretionary
0
3
52
5
53
3
Claystone, silty
0
10
53
3
53
8
Bone
0
5
53
8
75
2
Claystone, silty 21
6
Bedding is almost
75
2
77
2
Sandstone, medium, grading into
horizontal, with
upper and lower strata
2
0
infrequent cross -
77
2
80
10
Claystone, silty
3
8
bedding.
80
10
61
8
Sandstone, silty
0
10
81
8
82
1
Claystone, silty
0
5
82
1
86
2
Sandstone, silty
4
1
86
2
86
5
Claystone, silty
0
3
86
5
87
9
Sandstone, silty
1
4
87
9
90
5
Claystone
2
8
90
5
92
1
Claystqne, silty, with sandy
streaks and coal fragments
1
8
0
0
Log, hole 1 (Cont.)
Depth
From-
To-
Thickness
Ft.
in.
Ft.
in.
Material Ft.
in.
Reeks ,
92
1
99
6
Claystone, silty, with
occasional coaly fragments
7
5
99
6
log
6
Sandstone, clayey matrix
10
0
Core loss 2 ft. 5 in.
109
6
242
0
Sandstone, soft, medium to
fine, containing multiple beds
of hard pebbles (quartz, chert,
rhyolite, felsite) basalt) and
occasional coal fragments
132
6
Core lose 111 ft.
242
0
243
9
Claystone, bone streaks
1
9
243
9
258
9
Claystone, silty
15
0
Core lose 2 ft 0 in.
258
9
296
9
Interbedded fine sandstone,
siltstone and claystone with
occasional coaly streaks
38
0
Core loss 1 ft: 0 in.
296
9
300
5
Claystone, coaly, with many
bright coal bands
3
8
Core lose 2 in.
300
5
302
6
Claystone, coaly, with few
bright coal bands up to 1 in.
thick
2
1
302
6
312
8
Interbedded claystone and
siltstone, with occasional
coaly fragments
10
2
312
8
322
11
Siltstone, sandy streaks
10
3
322
13.
323
7
Claystone, coaly
0
8
323
7
332
2
Interbedded siltstone and
fine sandstone
8
7
332
2
333
10
Interbedded siltstone and
claystone
1
8
333
10
334
5
Siltstone
0
7
334
5
334
9
Shale, soft, dark
o
4
334
9
335
2
Claystone
0
5
335
2
336
0
Shale, soft, dark, occasional
coal fragments
0
10
336
0
341
2
Interbedded siltstone and
fine sandstone
5
2
341
2
341
9
Sandstone, soft
0
7
341
9
342
3
Interbedded siltstone and
fine sandstone
0
6
342
3
345
2
Sandstone, soft
2
3.1
345
2
351
5
Interbedded siltstone and
claystone
6
3
351
5
353
0
Claystone, soft, dark
1
7
353
0
353
6
Siltstone
0
6
353
6
372
0
Interbedded claystone,
siltstone and fine sandstone
18
6
372
0
376
9
Sandstone, soft
4
9
Core loss 6 in
376
9
387
6
Interbedded claystone and
shale, silty streaks
10
9
387
6
387
7
COAL, hard, bright, with
conchoidal fracture
0
1
0
Log, hole 2 c k6K
Location: 710 feet S. and 2,150 feet E. of NW. eoraer Sec. 20, T. 18 N.
R. 3 W„ Seward Meridian, Houston, Alaska.
Elevation: Co17,ar of hole - 330 feet.
Doth
19
0
From--
6
To -
Ft.
11
7
0
0
19
0
19
0
21
6
21
6
21
U
21
11
33
6
33
Log, hole 1 (Cont.)
80
0
Depth
From-
To-
Thickness
Ft.
in.
Ft.
in.
Material
Ft. in
Rem
387
7
388
8
Claystone, coaly
1
1
388
8
393
8
Claystone, silty streaks
5
0
393
8
394
4
COAL, hard, bright, with
bony streaks
0
8
394
4
402
1
Interbedded claystone and
siltstone
7
9
402
1
403
4
Sandstone, medium -fine
1
3
403
4 -
435
10
Sandstone, medium fine, with
soft layers and occasional
coaly streaks
32
6
435
10
453
4
sandstone, soft, with few
pebble bands
17
6
Core loss 16 ft. 2 in.
453
4
456
4
Sandstone, soft, medium -Pine
3
0
456
4
471.
l
Sandstone, porous, poorly
cemented
14
9
Core loss 8 ft. 9 in.
Gas flow accompanied \
by brackish water -
static pressure in
excess of 15 lbs.
per sq. in.
471
1
481
7,
Sandstone, alternating soft
and dense, pebble bands -
bottom of hole in bard, faze
sandstone
10
6
Bedding remains al-
most horizontal -
little distortion
evident.
LL
Log, hole 2 c k6K
Location: 710 feet S. and 2,150 feet E. of NW. eoraer Sec. 20, T. 18 N.
R. 3 W„ Seward Meridian, Houston, Alaska.
Elevation: Co17,ar of hole - 330 feet.
Material
Overburden, soil and gravel
Sandstone, medium -coarse,
with iron stains
Shale, carbonaceous
Interbedded silty claystone
and siltstone
Sandstone, soft, occasional
pebble bands and coaly
streaks
Thickness
Ft:_—ia.
Doth
19
0
From--
6
To -
Ft.
11
7
0
0
19
0
19
0
21
6
21
6
21
U
21
11
33
6
33
6
80
0
Material
Overburden, soil and gravel
Sandstone, medium -coarse,
with iron stains
Shale, carbonaceous
Interbedded silty claystone
and siltstone
Sandstone, soft, occasional
pebble bands and coaly
streaks
Thickness
Ft:_—ia.
Remarks``
19
0
2
6
0
5
11
7
UR
80 0 105 2 Claystone, occasional iron-
stone nodules, coal fragments 25
6 Bedding, where seen,
almost horizontal.
2
7 -7701 -
STATE of ALASKA
�
'Oarhwrx XffV OV NATV"L RX*OU*C=
D1 1 1014 OP MI AND MIP411RALS
S29 SF -C* O Amus
ANCHORA139, ALASKA
er 30, 1951
PETROLEUM SRANC24
Donald Geology Br4 fh SQQ#ED JUL 1 3 2007
3
Oftlogics, SurveyXiddlo
f ield Roa
l fo nia
Dear Don,
fo et i mete sever, records for tie fall l
rg
VA,64
AilCo. f '111f. , € pr. '*Kenai UAit" 2 -5
Rie t1jesl log and core elesctipti ns.
Standard Evil . f C lif— ger. ' 32_15
lectric l log.
chcsrae age & fail vl . '`Rosette" 4
'Ziecarical and Micro log.
There were no core nor saWi-e descriptions for t letter tvOmo ils.
yours very >rl,
DDis3 bb
cc: Florence Weber
Donald D. BrUct
€ hief, petroleum
Ago
E. ri. 069
Dear Don:
IN REPLY REFER TO:
TAc Ober 17,1959
There will be send to You today via parcel post a package containing
the fallowing washed lithology chips. From the well Rosetta # 1 the samples
between the depths of 4095 feet to 4245 feet and from the Aosetta # 4 well
all the washed samples between 0 and 1624 feet,An occasional check for
microfosails brought no results.This are all the samples I have recieved
from those two wells.
In
S ',cerely,
e
Henry Bender
Phys,Sci,Techn,
RECEIVED
NOV 19 1909
ALiaS-ti€�v aaELi,. oti,
MENLO PARK
Nov � 9 �g59
OATA Off
gp,�iF.s
� of TN
UNITED STATES
DEPARTMENT OF THE INTERIOR
a
GEOLOGICAL SURVEY
Alaskan Geology Branch
Fairbanks, Alaska
Mr. G.Donald Eberlein
Acting Chief
Alaskan Geology Branch
U.S.Geol6gical Survey
345 Middlefield Road
Menlo Park,Calif ornia
Dear Don:
IN REPLY REFER TO:
TAc Ober 17,1959
There will be send to You today via parcel post a package containing
the fallowing washed lithology chips. From the well Rosetta # 1 the samples
between the depths of 4095 feet to 4245 feet and from the Aosetta # 4 well
all the washed samples between 0 and 1624 feet,An occasional check for
microfosails brought no results.This are all the samples I have recieved
from those two wells.
In
S ',cerely,
e
Henry Bender
Phys,Sci,Techn,
RECEIVED
NOV 19 1909
ALiaS-ti€�v aaELi,. oti,
MENLO PARK
Nov � 9 �g59
OATA Off
gp,�iF.s
