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GMC Data Report No. 015
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BOX 900 DALLAS, TEXAS 75221 Mr. William Van Alen State of Alaska Alaska Oil & Gas Conservation Commission 3001 Porcupine Drive Anchorage, Alaska 99501 ESC REQUEST NO. 311A78 VISUAL KEROGEN, THERMAL MATURATION, TOC AND ROCK-EVAL ANALYSES, SOCAL CAPE ESP_ENBERG #.!.. _ KOTZEBUE, ALASKA Dear Mr. Alen: This report discribes the visual kerogen, thermal maturation, TOC and Rock-Eval results from the SOCAL Cape Espenberg #1 well, Kotzebue, Alaska. Visual kerogen and vitrinite reflectance analyses are based on 24 ditch samples taken at 300' intervals between 130' and 8320' (TD). Four core samples are also included in these studies. TOC and-Rock-Eval analyses are based on 24 ditch samples taken at 90' intervals between 190' and 3970', and 510' intervals between 3970' and 7750'. A plot of the low-gray Ro means (figure 1), a kerogen analysis sheet (table 1), a summary of the thermal maturity and hydrocarbon potential (table 2), histogram plots, and a copy of the TOC and Rock-Eval report are included. Results from TAI analysis of the ~SOCAL Cape Espenberg #1 indicate that the section penetrated from 130' to 1570' is transitionally mature, and the interval between 2380' and 4540' is slightly mature. The TAI results and vitrinite reflectance results are in conflict. The vitrinite data indicate the 130' to 4540' interval is thermally immature. The TAI values were taken from spores which tend to be thicker walled, therefore, darker than the preferred bissacates. It is possible that the dark color of the spores was caused by oxidation. In either event, the sparseness of palynomorphs inhibits any further breakdown of maturity by TAI analysis. Results from visual kerogen analysis of the SOCAL Cape Espenberg #1 samples are listed on the attached kerogen analysis sheet (table 1). It should be noted that all of the samples analyzed from this well are dominated by cellulosic (gas type) kerogens. Fluorescence analysis of these samples supports this interpretation. Alaska Oil & Gas -2- November 23, 1981 Results from vitrinite reflectance studies on the SOCAL Cape Espenberg #1 well indicate that the interval between 130' and 5000' is thermally immature. The interval between 5000' and 7420' contains no in situ vitrinite. The interval from 7705' to 8320' is overmature. Lithologies indicate a section of volcanic rocks from 5000' to approximately 7400' with pyroclastic rocks and metamorphic sediments from about 7400' to 8373' (TD). A plot of the low-gray Ro means from the Cape Espenberg #1 samples is attached (figure 1). A summary of the thermal maturity and hydrocarbon potential of the Cape Espenberg #1 samples is also included with the report (table 2). Histogram plots of the Ro readings from each sample are attached. The reflectance measurements used in this study were made by R. R. Taylor. Results from TOC analysis range from "poor" below 5860' to "very good" for samples between 1030' and 1450'. Pyrolysis indicates "poor" to "marginal" hydrocarbon potential for the samples that have TOC's over 1% and gas as the most likely hydrocarbon they would generate. Time requirements for this job were charged to ESC Request No. 311A78. If you have any questions concerning the results or interpretations, please do not hesitate to contact me. Very truly yours, T. ~F. Timmcke Exploration Services Center Applied Stratigraphy TAT/jg Attachments · ORGANIC RESIDUE (XEROGEN)ANALYSIS u-oos SCALE' T : TRACE I<1%J TYPE OF POLLEN COLOR, DEPOSITIONAL 1 : 1-1o% 6 : 51-6o% ORGANIC FLUOR TAI AND PRESRV ENVIRONMENT 2 : 11-20% 7 ,. 61-70% ' 3 : 21-30% 8 : 71-80% MATTER MATURATION 4 : 31-40% 9 : 81- 900~ ' -- ~ ..... ..... >'=--'~ "," o ,z REMARKS' /%, --fqo' I 'q''~ ;.~: .// /,. / / '>t'o.~_~L-.-- ' ~'t.,'iL,' - 5¢'o' i .-r :7z. I I / '/ .... L,-' . f aE:o - '.i lo ~ r"5' 9 I' L/./ / / ,,, ~::.','-lC., [ L. .~. 'C) i .~__ I B / / ~ , ::-,%.'.0 >520 1' L~:3 ¢,!--T /_ '_ 7 ..- '-: k,~-o --,~ go ~¢' '.g q"~ .2 // _ ,,--' /~.. · ,;%'tx '- -//,:,cO . / 5'/' I //; / /" ~/'.,:' 'd ' xtq(..O ~" -fi ::'"- '-'- .'" / .__ ...',.'/'c - C'.~.-/C:c~ _ _.'E! o , _ 1,4 .... ~/i t.~, ,"5/,'~,." - L,'?d,o _J _ _ - , . . / /'t (,.', 1 ,,o g ¢.^,-.-- i c/ec r,o~.O, I~ 5,x?-,_l 1/ / d e ~,:,.'-.. q %05 i 'q! f~ / · ~ -- , ~ , ,, .... _ ': · ,,.. t ~1 iVCn. , ......... .......... NOV.; 0 ':~sl(a Oil',~. Caa Con& n I , i , FI GURE 1 Plot of Low-Gray Rd Means SOCAL Cape Espenberg #1, Kotzebue, Alaska ' SUFFICIENT FOR TOO MILD INCREASING OIL SEVERE ENOUGH TO SEVERE ENOUGH TO GENE RATION,- CAUSE INCREASING CRACK HYDROCARBONS FOR OIL ~ "- CRACKING OF GENERATION " z~ TO METHANE ~ GEOCHEMICAL HYDROCARBONS PARAMETERS ,,::% ~ ~ FAVORABLE tw M-048 (5,78) DEPTH IN FEET 2O0O 4000- 5000- 90OO' 10 12~000' 14,000' 0.5 0.7 0.8 1.2 1.35 2.0 2.5 3.0% · ~ ' ii~i!ii? ... _.P.!.!°-P1 eistocene · :'iiiiiiiiiiii! M. Miocene - ·i~iiiii! i:i:!:i:!:!:i.: La te Mi ocene · :::::::. ~, .:<;:,:-:.;,-..: '.'.'.,.. ....:.:.:.:.~ ·.......~. ...... '~!~!~?! Ia rl y Mi ocene :::::::'I ·'"""' · ,:.:.:.: [i!iiiiiiiiiiiji~ , .-.....-....... · .-...........-., · r~:~:~:~:: " :iiiiiiiiii!i!ii! O1 i gocene · 2iii!ii!i: ::::::::::::::::' · ....................... ':';';< .......... i¥;:;;':.;;;;:' - .................................. ' ..... ...-.-. ~! i!iiiiiiii!iiiiiii.-.'.--'.'.-.... Indeterminate Age !jiiiljill iii!jii!iilJilji! B a s a I t & V o 1 c a n i c s -.,.... :::::::::: i:i:i:i:!: i-:.:.:+:.:.: ,.,..,,.., iiiiii?i!iiii!!i .Vo 1 can ~ c ^§ ~ 1 ome rate .ii?i!j:: ;iii!i!iiiii!i?.~ - & Metasediments. ~ili! .~?~j~? ID 8373' :]:~:]:]:~:~:~:~: , ~:~:~:~:~:~:~:~:: ;rr:::;:: ',.::.: · .::::::' ~:~:.:!ii¥! ~: :::::::: ? ':~:~: ~:~:~:~ :::::::::::::: ..... . ~:~:~:~:i: :::::::::::::::: 'ESC No. 3llA78 Thermal Socal TABLE 2 Maturation and Visual Cape Espenberg No. 1, Kerogen Analyses Kotzebue, Alaska DEPTH OR SPL. NO. 130 490 850 1210 1570 1930 2380 2740 3110 3460 3820 4180 4540 4900' ~' 5260' ~ 5980 ~ ~.. ~-- LOW-GRAY Ro MEAN 0.22 0.23 0.22 0.25 0.26 0.27 0.27 0.25 0.26 0.29 0.29 0.34 0.43 0.49 0.49 % POP. 28 .65 73 92 75 89 94 85 81 73 74 84 92 74 100 lO0 FIRST HIGH-GRAY Ro MEAN 0.81 0.87 0.93 0.76 1.13 1.'28 1.24 0.86 1.29 1.05 0.74 0.76 1.13 0.97 POP. TAI 48 2 35 2 26 8 24 11 2+ 6 15 18 26 26 16 2+ 8 26 THERMAL MATURITY Imma tu re Immature Immature Immature Immature Immature Immature Immature Immature Immature Imma tu re Immature Immature Immature Immature Immature KEROGEN TYPE Cellulosic Cel'l ulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic HYDROCARBON POTENT IAL/REMARKS Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas 'type kerogen Gas type kerogen Sample lost Basalt-caved vitrinite Welded tuff-caved vit. TABLE 2 Thermal Maturation and Visual Socal.Cape Espenberg No.'l, Kerogen Analyses Kotzebue, Alaska DEPTH OR SPL. NO. 6340' 6670' 7060' 7420' 7780' 8140' 8320' LOW-GRAY Ro MEAN 0.66 1.70 2.13 2.33 % POP. 100 64 77 89 FIRST HIGH-GRAY % Ro MEAN POP. TAI THERMAL MATURITY Imma tu re Overmatu re Ov'e rFna tu re Overl~atu re KEROGEN TYPE Cellulosic Cellulosic Cellulosic Cellulosic HYDROCARBON POTENT I AL/REMARKS Insufficient data Insufficient data Insufficient data Volcanic Agglomerate- Probable caved vit. VOlcanic Agglomerate Ga s-me t a s ed imen ts Ga s-me ta sed i men ts Cores 5000' 5026' 7705' 0.40 0.34 1.77 65 100 94 1.09 28 Immature Immature Overmature Cellulosic Cellulosic Cellulosic Gas type kerogen Basalt-caved vitrinitc Volcanic Agglomerate Insufficient data ROBERTSON RESEARCH (U.S.). INC. REPORT NO. 489 GEOCHEMICAL EVALUATION OF TWENTY-FOUR SAMPLES FROM THE SOCAL CAPE ESPENBERG ~1%.~ ELL by Mary ,%fichaei Page Project No. RRUS/812/II/T/51 .Prepared by: Robertson Research (U.S.) Inc. 16730 Hedgecroft, Suite 306 Houston, Texas 77060 Prepared for: Mobil Exp. a Pro. Serv. Inc P. O. Box 900 Dallas, Texas 75221 September 25, 1981 ROBERTSON RESEARCH [U.S.) INC. INTRODUCTION Twenty-four samples were forwarded for Total Organic Carbon (TOC) analysis and Rock-Eval pyrolysis. The Rock-Eval pyrolysis was to be run regardless of the TOC value. Two of the samples exhibited high amounts of bitumen, as evidenced bY the coalescence of the pyrolysis S1 and S2 into a single peak. The suggestion was made to, and accepted by, the client to extract these samples and evaluate both the extracted sample and the recovered extract. SUMMARY- The source richness based on TOC range from "non-source" below 5,860 feet to "very good" for samples between 1030 and 1450 ft. Pyrolysis generally indicates "nonsource" to "marginal" amounts of hydrogen-poor kerogen. The T-max values indicate immature material but are probably not representative .for the samples with the single S1 + S2 peak. For samples 1450 and 2290, the S1 and S2 peaks merge, suggesting the presence ,of significant amounts of bitumen. A portion of the sample was extracted and rerun; however the general shape of the pyrogram did not change. The extract consists of moderate amounts of immature bitumen, and gives no indication of the type of material responsible for the anomalous Rock-Eval response. The increase in TOC for sample 1450 is reproducible and probably due to the removal of sulfur together .with the bitumen during extraction. The high per cent carbon and character of the chromatogram are consistent with a . coaly type material, which accumulates in an environment conducive to high sulfur concentrations. NOV o Oil & Gas Cons. tt~chorag~. $OCAL CAPE ESF~BERG ,. £ p T H L A T 0 L ii:, 0 Y ii TYPE AHORPHOUS · · HATURITY FLUORE$- 6ENERATION CENCE INTENSITY ZONES , ,, I · ,. · SOURCE R [ CHNESS (l ORGANIC CARBON) ...... , , ~'.s ~'.~ ,, FIGURE 1: SUHHARY PLOTS SHOWING KEROGEN ~PES, MATURITY, NOV3 0 ]981 AND SOURCE RICHNESS (SEE APPENDICES IV AND II) A,,~k~ o, & ~ Co,,. Comm~,~i~,, i:::q O E3 E l-q" I b::;O N Anchora.qe RESEARCH [U.S.] INC. l! I IIII I £ ,0 SOCAL CAPE ESPENBERG SOURCE POTENT[AL (S2) ,, , 2:5 5.9 PO~F-N~ 600D ill , ,imm ._ : Ill _ , _ L PETROLEUM TYPE (S2/S3) , 2.5 -P.~2 ~S OIL GENERATION ZONES (T-mox) I O~LI ,, PRODUCTI¥[TY INDEX (SI/ESl+S2]) , · FIGURE 2: SUH~IARY PLOTS OF ROC~<-EVAL PYROLYSIS DATA (APP~;DIX II) ROBERTSON ~ESEAROH [U.S.] INC. APPEND[X I TOTAL ORGANIC CARBON DATA Total organic carbon is determined by pulverizing the sample, treating a carefully weighed portion with warm hydrochloric acid to remove car- bonate minerals, and analysing the residue for carbcn content with a Leco carbon analyser: It is generally accepted that samples with less than about 0.5 percent TOC cannot yield sufficient petroleum to form commercial deposits and are therefore considered nonsources; samples with between 0.5 .and 1.0 TOC are rated as marg-Lnal in source quality; and samples with more than 1.0 TOC are ccnsidered to be good in source quality. RECEIVED; ~s,'~a 0/; & ~as Cons. COmmlssl~,g Anchorag~ ._ ROBERT$ON RESEARCH [U.S.] INC. Sample Interval 130- 250 340- 460 550- 670 760- 880 970-1090 1180-1300 1390-1510 1600-1720 1810-1930 2020-2140 2230-2350 2440-2560 DEPTH 190 400 610 820 1050 1240 I450 1870 2080 2290 2580 TOTAL ORGANIC CARBON DATA 5GCAL CAPE ESPENBERG =1 TOC 0.76 1.48 1.70 2.78 2.32 17.17 0.59 0.19 1.10 1.04 Sample DEPTH Interval (FEET 2650-2770 2710 2860-2980 2G20 3070-3190 El 30 3280-3400 3340 3490-3610 5550 3700-3820 3755 3910-4030 ~G70 4540-4660 4S~Z 5800-5920 5BSO 6430-6550 64G0 7060-7180 7120 7690-7810 77=__,0 TCC Iix] I .48 I .20 0.3~ 0.57 I .~02 '3.55 0.78 I .44 D.12 0.04 RECEIVED NOV 3 0 1B~l Oil & Gas Cons. Anchorage, ROBEF1TSON ~F=SEAI~CH (U.S.] INC. APPENDIX II ROCK-EVAL PYROLYSIS DATA 'Rock-Eval data are expressed as mg/g of rock and include four basic parameters: 1) S1 represents the quantity of free hydrocarbons pre- sent in the rock and is roughly analogous to the solvent extractable portion of the organic matter; 2)S2 represents the quantity of hy- drocarbons released by the kerogen in the sample during py-r~lysis; 3) S3 is related to the. amount of oxygen present in the kerogen; and 4) T-max, in '°C, is - the temperature at which the ma.k'iraum rate of generation (of the S2 peak) occurs and can be 'used as an estimate of thermal maturity. In addition, the ratio S2/S3 provides a · general indicmtion of kerogen quality (type) and reveals whether oil or gas are likely to be generated. The ratio S1/(S1+S2), or the producti~*ity inde.--., is an indication of the relative' m-nount of free hydrocaz~bons (in place or migrated) present in the sample. Hydrogen and oxygen index values are in mg of hydroc.uz'bons (S2 peak) or carbon dio~cide (S3 peak) per gram of organic carbon. When plotted against each other on a van Krevelen-type d~ngram, information on kerogen type and maturity can be obtained. Data are interpreted in the following manner: Source Potential - values of S2 < 2.5 : poor 2.5-5.0 : marginal >5.0 : good Petroleum .Type - value of S2/S3 <2.5 : dry gas 2.5-5.0 : wet gas >5.0 : oil Generation Zones - values df T-max <435 : immature · 435-470 : oil 450 + : gas. ProductivitYhydrocmrbons.Index- high values~ ~ [°f~ [v'S~'/6S1+S2) indicate migrated NOV 3 0 198t & co,,,. Anchoraga RESEARCH [U.S.) INC. ~PTH · 100 400 610 820 1030 1240 145~' 1660 1870 2080 25~0 27~0 · 2G20 3340 3550 3755 3970 4600 5860 6400 7120 7750 $1 ROCR-EVAL PY~ROLYS[,.S RAg DATA $OCAL CAPF' ESPENSERC =1 s2 s3 s2/sz 0.081 0. 157 0. 082 0.110 0. I02 0 114 0.0,~3 ~.~2~ ~. ~57 ~.148 ~.664 ~. ~5~ ~.~41 ~.~96 ~.~33 ~.~TB 3.~8 ~.~7 ~.~15 ~. 0,820 I ,514 1. :J82 1:855 3. 105 3. 747 (8. 328 0. I63 1.34g ~.416 1 .~04 I .551 ~. e. 162 I .508 3. 466 ~.51~ ~. 886 ~. 1.768. 0.464 4.28~ 0.354 2.487 0.707 3.106 ~.507 3.113 0.~7 3 266 I :47 0.g27 0.354 0.408 2,328 2.403 0.541 i--! III 3.818 0.100 2.835 2.35~ 4.307 0,353 1.478 0,138 3.803 0,042 3.457 0.462 l.g4g 1.779 3.245 0.157 2.267 0.301 1.151 0.025 0.550 0.0~5 ~.069 0.077 0.641 0,069 0,000 0.0~4 0.~40 0.856 0.032 0'030 0.1~5 0.~31 0.048 0.~2~ 0.120 0.3E0 0.158 0.203 0.05? 0.057 0.061 0.~73 0.387 0.674 0 155 0.458 T-MAX 423 42! 415 412 416 ...Il 401 415 425 425 4.45 434 .4Z5 ,426 425 405 RECEIVED NOV 5 0 1981 Alaska Oil & Gas Cons, Comrnissio, ' Anchorage '~z:~(~BEFRTSON RESEARCH [U.S.) INC. HYOROGEN AND OXYGEN INDICES FROM ROCK-EVAL PYROLYSIS OATA, WITH TOC DATA SOCAL CARE DEPth HYdrOGEN {FEET) {mg hC/g ]g0 108 490 102 610 121 820 I09 1050 112 1240 .162 I450 13 I660 56 1870 86 2080 10I 22~0 211 2500 40 2710 68 2920 129 3130 57 3348 44 3550 96 3755 630 3970 65 4650 .62 5860 24 G490 20 7120 138 7750 34 INDEX TOC) OXYGEN INOEX TOC {mg C02/g TOC) (=) 233 0.76 2~9 1.48 152 ].64 183 1.70 112 2.78 141 2.32 24 17.17 157 0.59 282 0. I9 187 1,33 377 1.10 367 1.04 162 1.48 3~6 1.20 411 0,36 I052 8.37 2!3 1.62 354 0.55 416 0.78 157 1.44 959 0.12 1374 0.04 1781 0.06 4g~ 0.13 RECEIVED' NOV 3 o 1981 A1ask~ Oit & Gas Cons. Commission ~,.~o.~,~ F:q.C:) ESt EE l:q'1 I" '~ CD N FRESEARCH (U.S.) INC3. III 600 $OCAL CAPE ESPENE1E~C ,,1 I ii ii iii i ii ~ ....... i , il 100 200 300 400 500. ~03 700 800 OXYGEN INCEX ~EROGEN TYPE OETER~INATiON FROM ROC~-EVAL. PYROLYSIS DATA CAPPENOIX II1. P,E .EIVED NOV 3 0 1981 ~aska Oil & Gas Cons. Commissipr~ Anchorage. ROBERTSON RESEARCH [U.S.] INC. D~PTN 2290 ROCm-EVAL PYROLYSIS RAW 0ATA SOCAL CAPE ESPENBERO ~1 S1-S2 S~ S2/S~ 25.548 1'5.S84 1.75g 3.610 2.765 0..000 S1/{SI+S2} 0.8~0 ! HYOROGEN AN0 OXYGEN INOICES FROM ROC~-EYAL PYROLYSIS DATA, WITH T0C 0ATA SOCAL CAPE ESPENBERG .1 T-MAX 803 400 200 0 DEPTH HYDROGEN INDEX (FEET] ~mg HC/g TCC) 0XYCEN INBEX T0C (rog C02/g TOCl 1450 137 78 2290 0 251 17.17 1.10 SOCAL CAPE ESPENBERG =1 OIL · Il 70a 800 FIGURE 3: PYROLYSIS DATA (AP;:DENCIX I I ) . NOV 0 1981 ¢~l~qkn. 0il & Gas Cons. Commissio~ RC)BERmS, ©r',j RESEARCH [U.S.] INC. DEPTH ~450 22G0 SOCAL CAPE ESFENaERG ,1 - EXTRACTED 1G.745 15.G4g I.~SG 0.013 0.5~6 3.6~3 0.132 0.058 HYOROCEN ANO OXYGEN INDICES FRO~ ROCA-EVAL PYROLYSIS DATA, WITH TOG DATA $OCAL CAPE ESPENBERC =1 - EXTRACTED T-MAX 4]0 DEPTH [FEET] 1450 2290 HYOROGEN INOEX OXYGEN INCE× TOG {mg hC/g TOC) {mg C02/g TOC] [=] g2 88 18.12 62 471 0.83 SOCAL CAPE ESPENSERG =1 - EXTRACTED 800 600 . ~ I0~ F [ C, URE 3: 200 300 4~0 500 6~0 .700 800 OX¥CEN INOEX NOV 5 0 1981 Gas Cons. Coi]unlsslQ~1 ROBER i REBEARCH [U.S.] INC. APP ~..:TDIX t:]:I ORGANIC EXTRACT DATA ! I Fifty grams of each sample is pulverized and soxhlet extracted for I~ hours with dichloromethane to obtain the %oral amount of extractable _rmaterial. The extract is first deasphaltened by precipitation with hexane. The soluble fraction is then separated Lu[o saturates, aroma- tics, and NSO compounds on a silica-alumina chromatographic column by successive elutions with hexane, benzene, and benzene-methanol solvents respectively. The total ex~ract is expressed in par~s per million cf %oral sample exlracted and the functional groups are expressed as weight percent of total e:c~ract. Gas chromatograms of the C15+ saturate fraction were produced with a Perkin-~Jner, Sigma 3 gas chromatograph fitted wittl a 12 foot, NaNO3/LiNO3/KNO3 eutectic column. The chromatog.~aph ;vas pro- gl~ammed from 40°C to 3600C at 12°c/min. using helium car~ier gas at the rate of 25 ml/min. Straight chain paraffins (n'alkanes) are normalized between C15 and C40 to a sum of 100% and ~he percent of individual components plotted on bargraphs. Several ratios involv~mg pr~.s~e (Pr_) and phy~ane (Ph) are also calculated and plotted. Carbon preference index (CPI) values are calculated wil;.~ the original Bray and Evans formula. ?ECEIV D' COMPOSITION OF $OURCE-ROC~ EXTRACT SOCAL CAPE ESPENSERG .1 OEpTH[ FEET) EXTRACT PP~ ~ 5AT % ARO~ 1450 480 1g.50 2270 55~G 10.70' ~.50 8.50 ~1.40 55.70 24.40 RECEIVED NOV 3 o lg/B] Alaslm 0il & Gas Cons. Commis~o,q /mchora§e R©BEF TSON RESEARCH [U.S.) INC. 'L I Illll I [Ill . Il__ 1450 feet. ~_--: '~°90 Ceet. ,NOV 7, Anchorage - ..-- _,.. ~.-,;T--_ '-I~~A~'I+$ [U.S.] INC. 2~ 3O 35 4O REEEIVED NOV ~ o ]98~ Alaska Oil & Gas Cons. Corn~nissiot~ I BF__.PTH [FEET ?90 ! 420 ROC~-EVAL PYROLYSIS RAW DATA SOCAL ~'~IU~ PT. =1 - EXTRACTED 51-52 S3 S2/S3 1.535 2.023 0.758 14.542 2.589 5.617 SI/(51~S2) 0.000 0.000 T-MAX 332 I 800 400 200 HYDROGEN AND OXYGEN INDICES FROM ROC~-EVAL PYROLYSIS DATA, VITH TOC DATA SOCAL MIMIU~ PT. ~1 - EXTRACTED DEPTH HYDROGEN INDEX OXYGEN INOEX TOD {FEET) {mD MC/g TOD] [mg C02/g TOC) ~=) 7G0 98 130 1.56 1420 I~6 28 9.32 SOCAL MIDIU~ PT. = 1 - EXTRACTED m , , ! . i i ,, i,, i i 100 200 300 400 500 600 700 800 FIOURE 3, ~EROGEN TYPE OETER2INATION FROM ROC~-EVAL. PYROLYSIS DATA [APPENDIX II). NOV 3 0 1981 .ql-,,~a Oil & Gas Cons. ROBERTSON RESEARCH [U.S.] INC. III ORGANIC- F_XTRACT DATA Fifty grams of each sample is pulverized and soxhiet extracted for 18 hours with dich!oromethane to obtain the total amount of extractable material. The extract is f~st deasphaltened by precipitation with hexane. The scluble fraction is then separated Lnto saturates, aroma- tics, and NSO compounds on a silica-alumLna chromatogr~pi~,ic cclumn by successive elutions wit,~ hexane, benzene, and benzene-methanol solvents respectively. The total extract is expressed in parts per m~2!ion cf total sample extracted and the functional =~roups are expressed as weight percent of total extract. Gas chromatograms of the ClX+ saturate fraction were produced with a Perkin-~mer,. Sigma 3 gas chromato~rapl~ fitted with a 12 foot, NaNO3/LiNO3/KNO~ eutectic column. The chromatograph was pro- grammed from 40°C to 360°C at 12°C/min. using helium carrier gas at the rate of 9-~ ml/min. Straight chain paraffins (n-alkanes) are normalized bet;veen Ci~ and C40 to a sum of 100% and the percent of individual components plotted on ba~'~raphs. Several ratios involvin~ pristane (Pr) and phyzane (Ph) are a/so calculated and plotled. Carbon preference index (CPI) values are calculated with the original Bray and Evans formula. DEPTH[ FEET1 790 1420 COMPOSITION OF SOURCE ROCK EXTRACT SOCAL MIM[U~ PT. 41 · EXTRACT PPM % SAT % AROM 181 G.5~ Ig.G0 200 2~.G0 12,70 = NSO 58.70 50.80 ~ ASPH 15'.20 15.g0 DEPTH (Feel) 790 1420 EXT/TOC 0.011 ~.0~2 RELATIVE COMPOSITION :SAT ~AR0 ASPH G.5 19.G' 7~.9 20.6 12.7 66.7 PR/PH 0.42 0.04 CPI 2.42 3.13 HEAVY HYOROCARBONS NORMALIZED TC SOCAL MIMIUK PT .) ID C-10 C-Il C-12 C-13 C-14 C-15 C-1G C-17 C-18 c-ig C-2g 700 ~.00 ~.00 ~.g~ 0,~0 0.~0 ~.0~ 0.~ 0.S~ 2.80 4.~ 5.11 1420 0.~0 0.00 0.~ 0.~0 0.00 ~.10 ~.50 2.50 ~.80 ~.79 4.30 ID 7gB 1420 C-21 8.gl 8.18 C-22 C-23 C-24 C-25 C-2G 16.72 1~ 71 7.7! 8 11 Z ~ 14.77 !~ 87 g.§8 G.C8 3 gg C-27 C-28 c-2g C-39 8.?~ 2.2~ 4.~ 1.4~ S.89 1.80 8.09 1.00 ID C-~l C-~2 C-SS C-34 C-35 C-ZG 700 '4.10 1.20 2.80 0.50 ~.70 1420 2.50 8.08 0.70 0.20 0.20 0.80 ID C-41 C-42 C-43 C-44 C-45 C-4G ID PR/T PH/T PR/17 PH/18 XI~O X100 790 1.10 2.8~ 1.83 o.g~ 1420 ~.Og 3.2g 1.24 0.85 C-37 C-38 c-3g 5-48 ~.50 0.20 0.00 0.00 0.00 0.00 0.0~ 0.80 PR/PH CPI C-MAX 0.42 2.42 C-22 0.94 ~. I~ C-2~ · F' 2O 25 SAMPLE: 730-850 feet t SAMPLE: ~36o-~8o :eet NOV 3 0 J~38 Al~s~'a Oil &/~ Cons. Co.lmi$:io~ GAS CHROMA~OGRAMS OF C~5. S~TURAT= HYDROCCRECNS · chor~,~ ROBERT$ON RESEARCH [U.S..] INC. Standard ~~ N 0 H A L ! T 0 II. CARBON NURBCR T 0 · IC£Y $OCAL HIHIUK PT. }~ I =11~- i ~~oLcd 3-Pr i 8'L~'n-C-I 7 2.,I ~tcr,~rotol 4."Pt-~ar~/~- 18 ,5-'Pr i NORHALIZED DISTRIBUTION' OF n-ALK^NES Sample Interval 100- 220 730- 850 1360- 480 1990-2110 2620- 740 3250- 370 DEPTH (Fee~) 16B ?96 1420 2050 2686 TOTAL ORGANIC CARBON DATA SGCAL MIMIUK PT..1 TOC Sample DEPTH (%) Interval (Fee?) 6.18 3880-4000 1.61 4510- 630 8.34 5140- 260 6.51 5770- 890 1,1'l 6211- 310 4570 52~0 5856 62G1 0.57 TOC (%) 0.14 0.1~ 0.1~ 6.18 RECEIVED NOV 3 o 1981 Alaska Oil & Gas Cons. COJIII'iliS.S!i, Anchorage. - ROBERTSON RESEARCH [U.S.) INC. M bil Exploration and Producing Services Inc. November 23, 1981 P.O. BOX 90O DALLAS, TEXAS 75221 Mr. William Van Alen State of Alaska Alaska Oil & Gas Conservation Commission 3001 Porcupine Drive Anchorage, Alaska 99501 ESC REQUEST NO. 311A78 VISUAL KEROGEN, THERMAL MATURATION, TOC AND ROCK-EVAL ANALYSES, SOCAL NIMIUK PT. #1~L KOTZEBUE, ALASKA Dear Mr. Van Alen: This report describes the visual kerogen, thermal maturation, TOC and Rock-Eval results from the SOCAL Nimiuk Pt. #1, Kotzebue, Alaska. Visual kerogen and vitrinite reflectance analyses are based on 19 ditch samples taken at 300' intervals between 100' and 6310' (TD). TOC and Rock-Eval analyses are based on 11 ditch samples taken at 510' intervals between 100' and 6310' (TD). A plot of the low-gray Ro means (figure 1), a summary of the thermal maturity and hydrocarbon potential (table 1), a kerogen analysis sheet (table 2), edited Ro histogram plots, and a copy of the TOC and Rock-Eval reports are included. ReSults from TAI analysis of the SOCAL Nimiuk Pt. #1 indicate that the section penetrated from 100' to 5770' is transitionally mature. The vitrinite data indicate that the 100' to 5770' interval is thermally immature. It is possible the dark color of the spores was caused by oxidation or by the fact that spores tend to be thicker walled than the preferred bissacates. Results from visual kerogen analysis of the SOCAL Nimiuk Pt. #1 samples are listed on the attached kerogen analysis sheet (table 2). It should be noted that all of the samples analyzed are dominated by cellulosic (gas type) kerogens. Fluorescence analysis indicates traces of lipid rich kerogens are present down to about 2600'. ' Alaska Oil & Gas -2- November 23, 1981 Results from vitrinite reflectance studies on the SOCAL Nimiuk Pt. #1 well indicate that the sediments .penetrated down to 5830' are all thermally immature. Igneous and metamorphic rock fragments are found below 5900'. A summary of the thermal maturity and hydrocarbon potential of the SOCAL Nimiuk Pt. #1 samples are listed in Table 1. Edited histogram plots of the Ro readings from each sample are enclosed. The vitrinite reflectance measurements were made by R. R. Taylor. Results from TOC analysis range from "poor" below 3940' to "very good" for the 1420' sample. Pyrolysis indicates little hydrocarbon potential for any of the samples, and gas as the most likely hydrocarbon they could generate during maturation. Time requirements for this job were charged to ESC Request No. 311A78. If you have any questions concerning the results or interpretations, please do not hesitate to contact me. Very truly yours, Exploration Services Center Applied Stratigraphy TAT/jg Attachments Thermal Socal Maturation Nimiuk Pt. TABLE 1 and Visual Kerogen Analyses No. 1, Kotzebue, Alaska DEPTH OR SPL. NO. 100' 460' 820' 1180' 1540' 1900' 2260' 2530' 2890 3250 3650 3970 4330 4690 5O50 5410 LOW-GRAY Ro MEAN 0.19 0.23 0.25 0.28 0.25 0.25 0.34 0.35 0.31 0.37 0.35 0.39 0.36 0.37 0.41 0.44 % POP. 18 65 85 36 69 74 85 8O 74 66 100 45 lO0 72 47 85 FIRST HIGH-GRAY Ro MEAN 0.36 0.69 1.64 0.58 0.99 1.10 1.75 0.91 2.29 0.72 0.59 1.36 0.74 0.87 % POP. 37 33 15 37 31 26 15 20 17 34 32 25 38 15 THEPJ~AL TAI MATURITY KEROGEN TYPE Immature Cellulosic Immature Cellulosic Immature Cellulosic 2 Immature Cellulosic 2 Immature Cellulosic 1+ Immature Cel 1 ul osic Immature Cellulosic Immature Cel 1 ul osic Immature Cellulosic Immature Cellulosic Immature Cellulosic Immature Cellulosic Immature Cellulosic Immature Cellulosic Immature Cellulosic 2 Imma~:U~] ~ l V ~C.~I 1 ul os ic A!2ska Oil & Gas Co~s. Commi$$lor~ Ar~chora,~ HYDROCARBON POTENTIAL/REMARKS Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Thermal Maturation Socal Nimiuk Pt. TABLE 1 and Visual Kerogen Analyses No. 1, Kotzebue, Alaska DEPTH OR SPL. NO. 5770' 6130' 6250' LOW-GRAY Ro MEAN 0.51 % POP. 68 FIRST HIGH-GRAY % Ro MEAN POP. 1.03 32 THER~AL TAI MATURITY KEROGEN TYPE 2,2+ Immature Cellulosic HYDROCARBON POTENT! AL/REMARKS Gas type kerogen Metamorphic rocks Hetamorphic rocks DEPTH IN FEET FIGL:~E. 1 Plot of Low-Gray Ro Heans SOCAL Nimiuk Pt. #1, Kotzebue, Alaska TOO MILD FOR OIL GENERATION ,,z, ~ ~: I ~ I STRONG OIL I ~ ~__.uJlz IGENERATIONI ~ 0,5 1,0 SEVERE ENOUGH TO CAUSE INCREASING CRACKING OF HYDROCARBONS SEVERE ENOUGH TO CRACK HYDROCARBONS TO METHANE i.5 2.0 2.5 3.0% · iiiiiii!iiiii}ii: Pleistocene - i:;ililil !?!!iiiiiiil Pliocene ;4 ;;-;;-;<' . , . :~!¥? , ~- Lower Miocene - , ::::::: ~r22 '.x-.'.'.'.-.-. - :-:-:.:-:.:-:.:. N~ddle g~ocene !!!ii!!}} ........ /.'.'.'.'.'. · ,, q -.;.;< ....... !i!!i!!!i: Early Miocene · · .'.'.-. ....... · ......... ' :il}iiiiiiiiiill TD 6311 ' ESC No. 311A78 lA~ LE 2 , M -005 ORGANIC RESIDUE ',<EROGEN)ANALYSIS I,~ev i ii iF , , _ , ill I i[~__ _ _J_iL~ SCALE' T : TRACE (<1%J TYPE OF ] POLLEN COLOR,! DEPOSITIONAL 1 : 1-10% 6 -' 51-60~ ORGANIC FLUOR. TA! AND PRESRV ENVIRONMENT 2 = 11-20% 7 -' 61-70% 3 = 21 - 30,% 8 : 71 - 807g MATTER MATURATION 4 : 31- 40% 9 = 81- 907,; ,o: / T 7///7 ,'5',~:,'-!:'.,oo _ 7' ..2:l~'12'~-~t'-'m~i-1-7' '-" ~'' L,' --i-~71' ,?-e:~o.- 2-",~0:, _LL.~_~ ................. ~ ..... , ................. L .......... ..... t ~ .......... ';5,0',.,~- ~ ~c~.~i- i~ , . ~ .__~_.t_i- ...... :_,._~_t _L__L_ _, ..... - .-; ..... [- ...... !- -I ................ _,~ : , ,. : ~.~ , ...... ....... ,,, : , ....... .... ~ _ ..... .... - __ - - NOV 3 0 1518'i n~ska Oil & Gas Cons. ,, ..... ltnchgra~ , , ,, i i i ROBERTSON RESEARCH (U.S.) INC. REPORT NO. 488 GEOCHFA{ICAL EVALUATION OF ELEVEN S.~MPLES FROM THE SOCAL NIMIUK POINT #1 WELL by Mary Michael Page Project No. RRUS/ 812/ II/ TI 50 Prepared by: Robertson Research (U.S.) Inc. 16730 Hedgecroft, Suite 306 Houston, Texas 77060 Prepared. for: Mobil Exp. & Pro. Serv. Inc P. O. Box 900 Dallas, Texas 75221 September 25, 1981 ROBERTBON RESEARCH [U.S.] INC. INTRODUCTION Eleven samples were forwarded for Total Organic Carbon (TOC)analysis and Rock-Eval pyrolysis. The Rock-Eval pyrolysis was to be run regard- less · of the TOC value. Two of the samples exhibited high amounts of bitumen, as evidenced by the coalescence of the pyrolysis S1 and S2 into a single peak. The suggestion was made to, and accepted by, the client to extract these samples and evaluate both the extracted sample and the recovered extract. SUMMARY The source richness based on TOC ranges from "non-source" below 3,940 feet to "very good" for sample 1420. Pyrolysis generally indicates "nonsource" amounts of hydrogen-poor kerogen. The T-max values indi- cate very immature material but may not be representative for the samples with the very low S2 values or with the single Si + S2 peak. For samples 790 and 1420, the S1 and S2 peaks merge, suggesting the presence of significant amounts of bitumen. A portion of the sample was extracted and rerun; however the general shape of the pyrogram did not change. The extract consists of moderate amounts of immature bitu- men, and gives no indication of the type of material responsible for the anomalous Rock-Eval response. The increase in TOC for sample 1420 is reproducible ~ind probably due to the removal of sulfur together with the bitumen during extraction. The high per cent carbon and character of the chromatogram are consistent with a coaly type' material, which accumulates in an environment D conducive to high sulfur concentratidh~.~ NOV 3 o 1981 Alaska Oil & Gas Cons. Comrlli$=ie~,z._' ' F--,IE'-) EB E i E:E; O N RESEARCH [U.S.] INC. TYPE % EXINITE + AHORPHOUS ,, , SOCAL MIIIIUK PT. ~I ,, HATURITY FLUORES- GENERATION CENCE INTENSITY ZONES ,, SOURCE RIOHNEgg ORGANIC CARBON) FIGURE l: SUMMARY PLOTS SH0',/ING KEROGEN TYPES, MATURITY, AND SOURCE RICHNESS (SEE APPENDICES ERTSON RESEARCH [U.S.] INC. SOCAL ~IMIUK PT. ~I SOURCE POTENTIAL (S2) 2.5 5.~ m m PETROLEUM TYPE (S2/S3) 6ENERATION ZONES (T-max) mi m m m PROOUOTIV ITY INDEX (SI/[S1+s23) FIGURE 2: SUMMARY PLOTS OF ROCK-EVAL PYROLYSIS DATA (APPENDIX II) ROBERTSON RESEARCH [U.S.) INC. APPENDIX I TOTAL ORGANIC CARBON DATA Total organic carbon is determined by pulverizing the sample, treating a carefully weighed portion with warm hydrockloric acid to remove car- bonate miner~]$, and analysing the residue for carbon content with a Leeo carbon analyser. It is generally accepted that samples with less than about 0.5 percent TOC cannot yield sufficient petroleum to form commercial deposits and are therefore considered nonsources; samples with between 0.5 and 1.0 TOC are rated as marginal in source quality; and samples with more than 1.0 TOC are considered to be good in source quality. RECEIVED NOV O 19 .. A!~ska Oil & Gas Cons. Anchora,q~ ROBERTSON RESEARCH [U.S.] INC. APPEND[X !I ROCK-EVAL PYROLYSIS DATA Rock-Eval data are expressed as mg/g of rock and include four basic parameters: 1) SI represents the quantity o£ free hydrocarbons pre- sent in the rock and is roughly analogous to the solvent extractable portion of the organic matter; 2) S2 represents the quantity of hy- drocarbons released by the kerogen in the sample during pyrolysis; 3) S3 is related to the amount of oxygen present in the kerogen; and 4) T-max, in °C, is the temperature at which the maximum rate of generation (of the S2 peak) occurs and can be used as an estimate of thermal maturity. In addition, the ratio S2/S3 provides a general indication of kerogen quality (type) and reveals whether oil or gas are likely to be generated. The ratio Sl/(S1+S2), or the productivity index, is an indication of the relative amount of free hydrocarbons (Ln place or migrated) present in the sample. Hydrogen and oxygen index values are in rag of hydrocarbons (S2 peak) or carbon dio:dde (S3 peak) per gram of organic carbon. When plotted against each other on a van Krevelen-type diagram, information on kerogen type and maturity can be obtained. Data are ir~terpreted in the following manner: Source Potential - values of S2 <2.5 : poor 2.5-5.0 : marginal > 5.0 : good Petroleum Type - value of S2/S3 ~. 5 : dry gas 2.5-5.0 : wet gas >5.0 : oil REC IYEI) . . Generation Zones - values of T-max <435 : immature NOV ~ 0 ]98]' 435-470 : oil 450 + : gas Alaska Oil & Gas Cons. Con~nlJss} /mchorag3 Productivity Index- high values of Si/(SI+S2) indicate migrated ~ hydrocarbons. ROBERTSON RESEARCH [U,S,) INC. l OEPTH 168 790 1420 2858 2688 ~3~0 3§48 4576 5200 5838 6260 [FEET! RGC~-EYAL PYROLYSIS RAh DATA SOCAL ~!H[U~ PT. sl S1 S2 S~ S2/S5 SI/[SI*S21 T-~AX 0 ~5] 0,326 0 5~9 0 626 0 ;S5 8.04~ 0.261 1 746 0.!58 0.1~2 421 8.862 1.719 1.121 1.533 .3.835 415 0 2~6 ~.181. ~ 589 ~.~97 0 164 ~15 ~.~25 3.~38 ~ ~78 ~.~0~ ~.4~2 ~.~6~ ~.218 ~.5~3 8.4~G ~.225 416 0.2G7 3.12g 3 2~2 ~.532 3.S~8 ~.35~ ~.25g 3 977 8.295 9.577 0.11! 9.~8~ D ~5~ 3.227 8.592 HYDROGEN AND OXYGEN INDICES FR0~ ROC~-EVAL PYROLYSIS DATA, WITH TOG DATA SOCAL .t'IIPIIUK ~T. . I DEPTH HYCROCEN INOEX OXYGEN [FEETl [mg ~C/g TOC) [mg C02/ 168 181 298 7~0 ....... i42g --- --- · 2050 84 563 2688 155 18! S~0 32 '~5 ~94~ 27 278 4570 ~82 ~4 5200 2!5 4~3 58S2 2;6 73~ 6268 4~ ~65 JNOE× g TOC) TOC :2.18 ) .61 ,9.34 0.31 '3.57 0. '.- 4 ~.;2 0.86 2].12 f ECEIVEI) NOV 3 o 1981 41aska Oil & Gas Cons. ~chorago FIOBERTSON RESEARCH [U.S.] INC. ! 0~0 B00 H R 0 800 N I 400 SOCAL MIMIU~ PT. ~1 I]1 '4* 200 300 400 500 600 700 800 OXYGEN INDEX ~EROCEN TYPE DETERMINATION FROM ROC~-EVAL. PYROLYSIS DATA {APPEND'IX II). ROBERT$ON REBEARCH [U.B.] INC. DEPTH iF__T) 7S0 1420 ROCK-EVAL PYROLYSIS RAW DATA SOCAL ~I~[U~ PT. =I SI+S2 S3 S2/SS I.g49 2.87~ 0.G78 11.512 7.731 1.489 SI/[SI+S2] HYDROGEN AND OXYGEN INDICES FROrl ROC~-EVAL PYROLYSIS DATA, WITH TOG DATA SOCAL M[MIU~ PT. ~! T-mAX DEPTH HYDROGEN INCEX [FEET) img HC/g TOC) OXYGEN INDEX TOG [mg C02/g TOC] [%) 790 121 179 1420 138 g3 1 .61 8.34 ,{ 80~ 60~ 400 200 0 0 SCCAL MIMIO~ PT. ~1 , l,Oll. / 100 200 308 400 §~0 6~0 780 808 OXYGEN INDEX FIGURE 3: I~EROGEN 'TYPE DETERMINATION FROM ROCI'~-EVAL. NOV.~ O ISSI PYROLYSIS DATA [APPENDIX I I ) · '~ska Oil & Gas Cor~s. Comn~is: Anchora~ ROBERTSON RESEARCH [U.S..] INC. **r.[]PIMl~r'~l'~ = LD ..FIP.S.T '.'AHPLE I'tO. = 0 · .LI~'~'T 3. AHPLE rt[z. = 99999 ..LrlRD [CII"U'IF~HD = LT 1 1'..=:;'47 5N 100" 4 .~:TF~tIDF~'D OF C'F~LIF. r4IMIUK PT.i:I,RK I'I/ll/81PT 2 1:.='.7'4:9 sO 4,-.n' 4 .~TAr.4Iu~P'P DF CAI IF. HIMIUK PT.;:I,F~K 11/11/81PT 3 I:~:'49 '-'N 820' 4 .~TAItI,Hi-'I~ bP K'HLIF. HIMIIJK PT.::I,F~K. I1/11/81RT 4 I:';;':;H %u llP. U' 4 .':TF~IIDH~D flF FALIF. ftlMILIK PT,::I.AK ll/I1/81PT- 5 1~:751 ':,u 154n' 4 =T'RItI~;.'D OF CF4LIF. ftIHILIK PT.:;I~FIK ll/II/SIPT . ."~%-. ~' 19.H' 4 .STAHIu~PD ~F FF~LIF. HIMII~K PT ::I,F~K II/ll/~_:IPT F. 1~, ~: .,0 F~ - - · -', 1~,. .,.,. 5n. 32.~0~ 4 .~TArtDARD. OF CF4LIF. HIMILIK PT.::I~RK ll/ll/~IPT 8 1'.~754 5n 253n" 4 .~TRHI~F~']'~ DF PALIF. MIMILIk PT.::I,I~K ll/I1/~IPT <3 1:3755 5n 2890' 4 .STFIHDRPD Of- I. HLIF. HIMII. IK PT.::I,FtK II/I~/81PT 10 18756, 5.0 :'~250' 4 STRUPF,~'r, OF CALIF. ftlMIUK PT.::I,AK ll/12/81RT 11 1~:T57 5N .3650' 4 STI4HDF~'D OF CALIF. HIMILIK PT.;:I~RK 11/1P/81PT 1~ 1;~75..q 5n 39?0' 4 STAHDARD OF C'I~LIF. MIMIUK PT.::I,141.:' 11/1.~'/81PT 1.3 18759 50 43:30' 4 STF~HDRRD OF C'RLIF. HIMIUK PT.::I,RK 11x1~x81RT 14 1:~760 .=..N 4690' 4 .STAH11APD [IF Ct~LIF. HIMIUI< PT.::I,AI<' 11/1~x'81PT 15 18761 50 5050' ~ STRHDF~f,'D UP CALIF. HIMIUK PT.;:I,F~K 11/1~/817-'T 16 18762 50 5410' 4 .~TRHDRRD OF CALIF. MIMILIK PT.::I,RK 11xI~/81RT 17 18763 50 5770' 4 STRHDRPD OF CALIF. HIMIUK PT.::I,RK ll/I~/81RT 18 18764 50 6130' 4 STRHDRPD OF CALIF. HIMIUK PT.::I,RK 19 18765 50 6250' 4 .~TRHDRI~D OF CALIF. HIMIUK PT.cl,F~K 20 9?999 $*C[IMMAH[" -- LO ..FIPST 'iF~MPLE riO. · 0 · .LB,ST JAMF'°LE rtL1. ' · .LOAD C I]MMRrtD = LP Q"'~ I1/13/81 18747 50 100'. 4 STAMDA;i>D OF CALIF. MIMIUI< PT.::I~AK 0 .... r.I = 122 3 * 0 * + . + + + + + + .+ + + + + + + + 000 025 050 075 1 O0 125 150 175 200 225 250 275 300 325 350 375 11/13,~1 18748 50 46b 4 ,STAMDF~PD DF CALIF. IHIMIIJP PT.::I,RK H = 124 ':TI,. EFT". = 5 .i:l'D. DEV. = .27 F'CT. POP. = 98 2? ,?~:. . _ 21 i :~: 17 1,S.' 15 1.3 11 I 0 8 ¢. · 000 025 .050 075 100 125 150 175 200 225 250 275 300 325 350 375 · . I 1,'13,'81 1874~ H = 125 r,lEAM = 4 2 :'TD. El;'{;'. = 9 ' '~TD. DEV. = 56 F'FT. POP. = 10°) 2'4 ~ . n 00 · J 4 (, 0 0 · [ :3 000 + u U 0 0J5 050 5O 82 O' .~TAMDRRD DF: CALIF.. MIMIUK PT.=:'I,RK ooo- 059 · + i ' $ .eeleeeeaeeeeleeeeeeeee~elleeeeeeee$emeeee.eeeleeee~eeeeeeee + + + + + + + + + + + + U75 100 1~5 150 175 2(,0 225 250 275 300 325 350 375 It = P1EI~H = :~TD. EF'P. = · :. rI,. DEV. = PC T. POP. = 2'4 · :' 3 ;22 P1 1 ;3 · 1 7 1.~ · 15 11 7 + 00* 6 4 000* :3 *000' 2 .*0000' I + 000 025 124 63 9 53 99 4- 050 075 · {{llllIl{llllllllllilt{lll{lll{I + + + + + + + + + + + 100 125 150 175 200 225 250 275 300 325 350 375 I1/13/81 18751 50 H -:' 125 HEAH = 4'3 :]TD. EF'P. = 6 ETD. DE".". = 35 F'CT. POP. = 100 · c:" 2'6, -.ic-- 24 '2 2'1 2' 0 1 '9 1540" 4 :STAHDRff']:! DF CALIF. HIMIUK PT.::I,AK' 0.99 000 025 050 £,75 I OO 125 150 175 2,~£J ' 225 250 275 30[, 325 3.50 375 11/13/81 18752 50 1900~ 4 ~.TF~rtPRPD DF CALIF. HIMIUK PT.::I,FIk: rJ = 125 I"IERM = 4'3 ~T,D. EF'F'. = 6, "TD. liE;/'. = 39 F'CT. POP. = 100 000 025 050 ,075 100 125 150 175 20)(, 225 250 275 30'0 325 350 375 11/13/81 18753 50 2260' 4 STRrtDR~'[, OF CALIF.' .HIMi. L!k: PT.::I,RK H = 125 MERH = 5 l :TD. E~'P. = 9 .:TIJ. 5'EV. = 54 F'LT. POP. = 100 :. ,_, ~,., 2'6. · ,>4 ~'.> ·4, 2'1 2 0 19 · · 1:9, 15 14 +* · 11 5 · 00 · · 4 · ~ none·+··· · _. . . I 0 0000'·*.**·* · o" -o - I. 5 · · :'4b 11./13,~:1 18754 50 ~'530' 4 3TAIiPR~D DF F. RLIF. ~{IMIUK PT.::I,FtK rt = 125 t'IE AI't = 4.4 '.' TI;,. EI;'I;'. = 4 :~.TII. llEV. = 25 F'CT. F'DP. = 100 ;.,., · 1 ;£: e 1,4 1.3 12' 11 10 * I,m · l.'l t,$ · 5 ,3 ... 1 O00000****·····e·· · · · ..... ................ · ...................... . ..................... + + + I + + + + + + + + + 000 025 050 U75 100 125 150 175 ~m.,u 225 250 275 300 325 350 375 11/13/81 18755 50 2890" 4 STRMDRPD OF K. RLIF. rilMIUk PT.::I,Ft~' r-t = 124 MERH = 57 :.TD. EPP. = 13 '~'TD. DEV. = 77 F'LT. POP. = ~ ~ -': 1. .'.:11 .--,::: 2,:' 24 ! 17 ]4 I ':-: 1! 1 0 :-3 ?' '., .4 1 et, .lille'~ It + * e I · O · · '~ · I I * I ! I . '~!I III ,.ltOll * I lllll I . . I !. ! ! el il i !!t!II!11111 lllllllllllllll + + ~ + + ~ + + ~ + + 000 025 050 U75 1 O0 125 150 175 2(,0 225 250 275 300 325 350 375 11/13/81 1:3756 50 3250' 4 STRMDR;~I, OF CRLIF. 'MIMIUK PT..':I,Rk r,I = 125 ME Rr-,I : 46. 'STD. EE'F'. = :3 ::.TI:. bEV. = 20 F'rT. POP. = 100 21:, 17 ee 16 15 14 10 *+e$eI 0.00 025 050 075 lO0 125 150 175 200 225 250 275 300 325 350 375 · 11/13/'81 18757 50 3650' 4 STANDARD DF CALIF. f{IMItll," PT.::I~RK ':TI). EF'F'. = ~TD. I~E",,'. = F'~:T. POP. = 100 OOf/ 0~5 050 075 I O0 1~5 150 175 ~m)O 6'~5 ESO 275 300 3~5 350 375 11/13/81 18758 50 3970' 4 ~TRrt]:tRPln OF CRLIF. HIMILIK PT.::I,Rk r,IERH = 72 $:TD. EF'P. = 1"~ ,~TD. DEV. = 59 PCT. PDP. = 95 :.:.: · ;" · .. ¢ + o50- oN' o.5 · ! Ii · I i I I · i I ! i I i · · · ! el · i e ii e I I i ii I I I I I I e · I i I I I I ~' '1' + + 't' 4' '+' 'I' '1' '9' '1" 'f' + 000 025 050 075 1 O0 125 150 175 200 ~'25 250 275 300 325 350 375 11/13/81 1875~ 50 4330' 4 STSriDAPD OF CALIF. HIMIUK PT.cI,RK H = 125 MERH = 36 :?T9. EPP. = 4 3T9. DEV. = 26 PCT. POP. = 10 :.":6 :'-:5 '34 :31 ~'4 :~, i i 17 e+ ..- ' . 1 1 1 0 7 + 000 + + + + 5 3 0 00 + + + * 2 0 00 0 + + + - ( . ) e~el . e eleee~el eeeeeel~eelmlee eelelee~emeee imeee lelleeel.e ~ee~eeel...~ ~e~ B...,I. + + + + + + + + + + + + + + + + 000 025 050 075 100 125 150 175 200 225. 250 275 300 325 350 375 11/13/81 18760 50 469f.1" 4 STAf{DAPD OF CALIF. ltlMIUK PT.cI,A~.. ii = 12L~. rdERrt = 57 PCT. POP. = 97 , 2] * , 16 cee 15 14 13 12 11 :E', 0 * * 7 0** ~ e I:le+ eec , 4 +O00++ee+ ·~ 3' 0000+**** · .. ~ 0 I:lUOO***+*_, .... e ..... · .......... * ............................ ( , ) 000 025 050 075 100 125 .150 175 200 225 250 275 300 325 350 375 11/13,'81 18761 ~'0 5050' 4 STIqMDi:IRD Og' CIqLIF. MIMIUk: PT.:=I,FII< I't = 124 FI~F~M = 7 :~T:]:I. EF'R. = .~T[, DEV, = F'CT. POP.'= 2 0 if I.'l (] I:l 0 O* ~,+ +,e *.e4 1 0 I] 0 [I 0 0 013k e+'l'+ e4"'e * + + .;, .;. .;. .;. + + + + + + + + + + + 000 025 050 075 1 O0 125 150 175 200 225 250 275 300 325 350 375 11/13/81 18762 50 5410' 4 STF:tMDFIRD JIF CRLIF. NIMILIK PT.::I,PIK ti = 125 {'tF Fff t" 4'.~ ::TD, EF'P, = 3 ::TD, DEV, = 22 PCT, PDP, = lot) 23 ,,. ' ;--? al ,,' ;:'0 17 13 ..,e 11 ,ce, . 5 4 .3 0000''' 2 s$ . + + + + + + + + + + + + + + + 000 0~5 050 0?5 ! O0 1~5 i50 175 ~(,u 285 ~50 875 300 3~5 350 375 11,'13/01 1876:3 50 5770' 4 ~,TRMI',I~PD 0~' CALIF. i'tlMIUl< r.{ = 125 MEAM = 64 :!~TD. EPR. = 6 .'Z:TD. DEV. = 36 F'C'T. POP. " 100 _ -- 025 O~l:l 0~ { O0 125 150 175 200 225 ~50 275 300 ' 3~5 350 375 11/13/81 18764 50 ~,130' 4 .STHttI~HF~b DF CRLIF. t'IlMIIJK PT.=:I,~K I'f = 24 MEI~I'{ = 22 0 ~:TD. ERE'. = 55 ?TD. DEV. = 135 PCT. POP. = .6.+ 4 :3 0,.30 025 050 075 100 125 150 175 2nO 225 250 275 300 325 350 375 I1/13/81 18765. 50 6250' 4 ~TRMDRRD OF C:RLIF. MIMIUK PT.=:I,RK l't = 37 MEFtH = 83 ~.TD. EPR. = 25 :~'TD. DEV. = 78 PC:T. POP. = 97 ' 1 ::'; 12 11 10 4 + + + + + + + + + + + + + + + + 000 025 050 075 100 125 150 175 200 225 250 275 300 325 350 375 , 11/13/81 18764 50 ~130' 4 3ThrUJH;,°~ DF ¢flLIF. HIMIUK PT.::I,flK ~ = ~4 ~ F~ ~ C~ ~ f'IE flH = ~:T~. EPP. = 55 :?TD. DEV. = 1~5 PCT. POP. = 4 ( . 000 OJ5 050 075 ZOO ~5 150 ~75 ~no JJ5 250 S75 300 3~5 350 11/13/81 18765. 50 6250" 4 3TflH];~fiP]) OF CRLIF. M'IMIUI< PT.'-:I,RK MEflH = 83 ~.:TD. EPF¢. = 25 ~'TD. DEV. = 7~: F'L"T. P[]P. = 97 + + + + + + + + + + + + + + + + 000 025 050 075 1 O0 125 150 175 20J) 225 250 275 300 325 350 375 11/13/81 99999 EOT H = 0 f,IERH = 0 3T['~. EF'P. = 0 :~T]'~. DEV. = ') PCT. PDP. = 0 + .+' '1' + 4- ~- 'l" .I" .+' : -+- -!- + 't- -I- '+' '+' (100 0;~5 050 075 I O0 125 150 175 2(,0 225 250 275 300 325 350 375 _ Mobil Exploration and Producing Services InC. P.O. BOX 900 DALLAS, TEXAS 75221 November 24, 1981 Mr. William Van Alen State of Alaska Alaska Oil & Gas Conservation Commission 3001 Porcupine Drive Anchorage, Alaska 99501 ESC REQUEST NO. 311A78 VISUAL KEROGEN AND THERMAL MATURATION ANALYSES, BENEDUM NULATO UNIT NO. 1, NORTON SOUND, ALASKA Dear Mr. Van Alen: This report describes the visual kerogen and thermal maturation results from the Benedum Nulato Unit No. 1, Norton Sound, Alaska. Visual kerogen and vitrinite reflectance analyses are based on 31 ditch samples taken at 300' intervals between O' and 11800' (TD). A summary of the thermal maturity and hydrocarbon potential (table 1), a kerogen analysis sheet (table 2), and histogram plots of the Ro measurements are included. Results from visual kerogen analysis of the Benedum Nulato Unit No. 1 samples are listed on the attached kerogen analysis sheet (table 2). It should be noted that all of the samples analyzed are dominated by cellulosic (gas type) kerogens. Fluorescence analysis supports this observation. Kerogen slides prepared from these samples were barren of palynomorphs, hence, TAI analysis was not possible. Results from vitrinite reflectance studies on the Nulato Unit No. I well indicate that all the sediments penetrated to a depth of 11800' (TD) are thermally overmature. Only the first sample from 0'-100' contains a low-gray Ro population which can be attributed to surface contamination. A summary of the thermal maturity and hydrocarbon potential of the Nulato Unit No. I samples is also included with the report (table 1). Histogram plots of the Ro readings from each sample are attached. No plot was made of the low-gray Ro means because the means are too high and plot off scale. The reflectance measurements used in this study were made by R.R' Taylor. ORGANIC RESIDUE !?(EROGEN)ANALYSIS IR,,v'''''oos o~-{~Ol -- i ii ,i ...... ii jIL I I I ~1 I SCALE: T : TRACE I<1%1 TYPE OF POLLEN COLOR, DEPOSITIONAL I : 1-10% 6 = 51-60% ORGANIC FLUOR. TAI AND PRESRV ENVIRONMENT 2 : 11-20% 7 -' 61-70?'; 3: 21-30% 8-- 71-8o,",~ MATTER MATURATION. 4 : 31-40% 9 : 81-90% ':~ t~" " I~ ~ '" t., R~MARKS' .. .~, ~ ,~,:~, .... ,. · . .... ~ -., IO ,' .... ',' ' '" , .... , ~ / , i ..... ........ _ __ , . - ,, ,. : " 7t....... ,',,, :~,":.' , ~ ~ ~_~ ('),. _ - / ....) . .~ ,' / ' ,~ .... ,'~ ~ ~.) ,,llm, . -~:,r,,'~. ~ ~ ~0 _ ';'~i '', .,, ~ ', ' 7::'"" / '/ , : ~,...'..7'.'~ ' ~,:~'" (:.1~,. ,. t,.,,/-f~ ~ ~'--,, r'. ,., ,.,,.,,.,...:,,,-n ,,~ ..-, ...'?',.. -,.-[O~:n ....... · .;., ~ . ~'.;,/".,'" c. '-,- ~ ...,~.) ~I /,,: .-~ '.~.t,O:)- 'i"~,0. ) ~ r,:; _ v'"' _. .... .'~ ~ 4 I C, O- In Z r~d T t~ :~:', - GoO , . - ,'_ , . . t./.?:~', - """ ', i~ F~ ~' T , , [ _ _. _ , ~l~/ ,, ............... - ~ic~orag0 ..... '-~'~1o , , .... , Alaska Oil & Gas -2- November 24, 1981 Time requirements for this job were charged to ESC Request No. 311A78. If you have any questions concerning our results or interpretations, please do not hesitate to contact us. Very truly yours, T. A. ~Tqmmcke Exploration Services Center Applied Stratigraphy TAT/jg Attachments DEPTH OR SPL. NO. 50' 400' 750' 1100' 1450 1800 2150 250O 2900 3300 3700 4100 4500' 4900' 5300' 5700' 6100' C) LOW-GRAY Ro MEAN 2.62 2,70 3.28 3.21 3.18 3.27 3.44 3.38 3.45 3.62 % POP. 62 92 91 82 94 72 8O 84 92 76 TABLE 1 Ro ~eans, TAI, and Kerogen Type Benedum Nulato Unit No. 1, Norton Sound, Alaska FIRST H I GH-GRAY % THE RMAL Ro MEAN POP. TAI MATURITY Ov erma tu re Overmature 4.07 8 - Ov e rrna tu re 3.97 13 - Ov e rrna ture 4.34 1 - Ov e rrna tu re 4.12 16 - Overmature , 4.21 16 - Overmature' 4.52 7 4.82 5 4.59 20 .3.77 72 4.59 22 3.61 92 - 3.98 78 4.98 8 4.07 93 74 92 83 5.45 3 5.04 6 5.52 5 5.63 12 ;m=~3.91 ¢'~ 3.91 4.10 Overmature Overmature Overmature Overma ture Overmature Ov erma tu re Overmature Overmature Overmature Ov e rrna tu re KEROGEN TYPE Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic HYDROCARBON PO TENT I AL / RE~-!A R K S Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen DEPTH OR SPL. NO. 6500' 6900' 7300' 7700' 8100' 8500 8900 9300 9700 10100 10500 10900 11300' 11700' LOW-GRAY % Ro MEAN POP. 4.09 88 4.10 71 4.07 65 4.22 70 4.23 79 4.32 76 4.28 86 4.28 85 4.33 77 4.30 80 4.39 80 4.39 63 4.42 ~ .47 4.43 80 Benedum TABLE 1 Ro [.~eans, TAI, and Kerogen Type Nulato Unit No. 1, Norton Sound, Alaska FIRST HIGH-GRAY Ro MEAN 5.92 5.'17 5.09 5.41 5.45 5.39 5.61 5.35 5.50 5.64 5.58 5.61 5.39 5.72 % POP. 1 13 9 14 12 21 7 12 17 5 5 17 18 8 THERMAl' TAI MATURITY Overmatu re Overmature Overma ture Overmature Ov e rrna tu re Overmatu re Ov erma tu re Overmature Overmatu re Overmatu re Overmature Ove rmatu re Overmature Overmature KEROGEN TYPE Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic .CellulOsic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic Cellulosic HYDROCARBON POTENTIAL/REMARKS Gas type kerogen G~s type kerogen Gas type kerogen Gas type kerogen' Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen Gas type kerogen + .. · + + . · ..;...2; .......; ........ ; .... ;.....; .... ,)F,N F~=' N t t)N 150 ~00 ~'SN '~:N (~ '~SN 40N 45N 500 550 600 ~50 700 r = .'TP. F. PF', = :~: F'F T. Pi'lP. = 1 F!N 1.4 1:": 1 d ..',, ,-. ~., · :': !' °"'°'"' '*' ° I '~:' +l+'~ + +' +~'++ + +4)'+ +'e' +++/ + i 11 r"t'~ '~::l l:~:~'~':.::|'| I:~N 531'10' 4 DF. r4~Td, ff,1 U!.ILRTB I. IIIIT t-.ID. I ,R[.R'~I."R r. IKAr *'TP. F g'~'. T P, [iF',/ I ": I ,"' 11 ,.:, 4- .~ 4- 4- 4- 550 ,6'00 .,F, 5 (~ 700 750 I I ..'19,'~:1 1:37:'_-:,1 5N 57,'.mil/ 4 ]~:Eri=DI. IM NLILRTD ur'tiT 1%10. I ,,AI_R".'-.'I.:'~ _ e.ee...llelee.e..eeeleeeleeee eleeee.e.ee-ee.eeeeo ~ ~ ~ I ~ ~ ~tt'tO Fi= N 1 NFl l~)'l ~l[IN ~N ~NN ~N 4NN 4~FI ~NN ~N ~.FiN ¢.~ff 7NO 750 r.~ = 1 · '..TTi, FI;q;', = 14 =trt. [IEV, = I:'CT. F.'Q¢-'. = 1 .c,l',' 4 E:EH~.DI. IM HIIL~TO I..tMIT HO. 1,lqLIqS. K'lq 11 '19 ,:::1 18767 ,~n 11qfl' 4 ~.EI.t¢'.[ii.II,1 bII.ILRTO Lit.iTT I'.tO. I r = 1,:'4 f,ll:'~r = ,>-:':. ~, :TII. ['EV, = r-u' T o F:'DF'. = 15: 1 1T 17: 1P 11 ,:. -- i · · . . ~ "2 i ' °- I I I I I e i · · I I ! ~ Illllel illll Iilllltlll I ...... ' :.. ~? ','l .I '~ .~. '. l 1 ." l'~,"::l 1:~:76:P ~O 750' 4 ~EHFrll_lbl NI.ILRTO t_IIIIT fig. I .RLRS:LfR j , '. 'i' ' . - :..., ,' F'CT. F'OP: = 100 ~ j t,? **' -~ ·. ':" I " " '"" 4 AA f~ = 125 ETD. Et'P. = ~'¢.T. C'F1F' = 1 nn (IA,', f"';O I 0," 1.=,''1 ,?l:,l', 2%0 .::f,l~ '5c..,0 400 4.~t) 500 _=,.~,0 61.'10 6=_,0 700 75n 11.'1'"..":=.:1 1:.:,770 5,', 1450"' 4 B~Hc.T',.Ir.1 HI. ILRTD UHIT f'IE'_ ~' t = ' TI'. EC"P' = I A g'¢ T. I:'Ol:' = 1 f,A 14 . · 1:: · 11.'1':'":::1 1:.::77'1 =,el I:.::CtA' 4 P, EM~T, ltM HULI~TD Ur.liT A r,,', r,':.; j-, 1 on l.~,O J' ,'~ ,:t 25t't '_4no .:5(" 400 45n 500 550 600 650 7 f'.J 0 7 .'5 f.t ! i + + .,. + + + + + + + + 11 .'1''~ '::~1 1:::77'-~ r..;f~ ,.:,c,r~N, 4 pFI'lCrHIM Hill RTD Iti'4lT HFI. 1,AI ,. I~ = 1,.:'5 IdFAI ~ = =: ' rp. Fr-'~;'.. = _ :'. : Tp. p~:',.,' = [:,r T. f::'DF', = 1 NN 1,= 14 1 I ,? 1fl 7 ':,, · ,=., ! : _ 1 ! ."'! 9 · '.:: ! ! :~774 5f'~ ,~90N" 4 ~:Er.jcDIjI'I HIJL;RTO I_IH l T HO. 1, RLR[-.FR ,.= ooo-z, q: I'IFAi' = .z:5,1 '"..T[~. EI;'F-' = I 0 ?.' 1' D. PF',..'. = F'I:T. F:'OF-',. = lflO I I"! J +********** n,',,', nsrl ton 150 j,,'ll'l ESt', 30N '~5,:1 41',0 45~1 si,r, 5sn 6fro 65n ?,)N 7~rl ri, = ] ,?5 M lc 1~ r = =', 7 .~ · '. T D. Fr-';', = ! A P,'T. POP. = 10~'~ ............................+ .. + + . + ]"i .... ; .... ; .... ; .... . ; ........ ; ................ + . + * OF~n o'. 0 I F~h l~f~ ~nn .:25~ 300 '3~n 400 450 500 550 ~ OU 650 700 750 ~ tl..'t'.:,.:~:t ]'.::?7,;t,clq '-:TF~A/ 4 p,~I'.4CDt.lt,1 rtlII.RTO I_It,CIT NFI. 1.AI. flFk'A ,:: ,.:_.., ooo.-.a,,q, z.fl /_4u). r,11:' R t '. = .:: :.::':~ ' T[Io gl:°r'",* I mi · ".TD. D?'/. = S? , F'~'T. PFlP: = iOF~ Hr-' Ar: = .":5 I'~ ' l'D. Er;';'. = 1 0 ' rrm. PFV. = .~'a I~'F'T. F'DP, : 1 fll't 1.> 11 ~ I'1 ::: 7 11 'l';~.'f"t 1:~.777 =,J, 41F~A" 4 ~.Flil:r,l~r4 t. IIII. ATEI. IIt'4TT riD, I,AI fl".'.'leA Z, (' · ') + - + + + + + + + + + + + + + + 11/19":R1 1:.~77:.=: 5f, 450,:,' 4 BEHC[,ur.1 1"4LILRTD UNIT HO. 1,RLR'F~:A :7:. '" ? ? I I ."1S,. :::1 1:'-.:?:.::3 ~n ~dn" 4 BEr..IC[,l_~r.~ rtULRTD I_lPlIT HD. I · HLFt'::I.. Ft '~TD. FPP'.' = 11 =TI,. T'F";. = P(T. POP. = lO(I 11 I F! · .{ '".TD. F~P. = 1 "' : Tr,. T'F'.". = =~,, P('T. POP. = !00 14 1J' 11 1 F, 11 .... 19 :~:1 1S7:.::~ 50 7DOn" 4 BEr1~[,url HULRTD UHIT ,: ,~, . ~-~, ~.~ (~?) ~' + ~ , . + . . . ",:' 0 7 5 0 ,, . 1. .." .:. . . . · · ' ' ' -. · ..' . i ~-',. ~. --:~:..:?. i ~?--~ ;?~.-'~ :~ ~..' '" :<-I . '?-/'-??' !'::;.~?: I'1111:1 I'1~ I1 I (Ill ] ~11 21'10 ~l'l :~1~11~ ~ 400 450 ~(l[l ~0 ~1:I~1 ~fl 700 75.0 I i .' 1'.~ ":.:: 1 I q-'"-'.. ~ ..- ...... ~F.~ .ql f~fI~ 4 ]::F. HI: DI_I~I HI.ILRTO IIHIT HFI. 1 · ALFrSkFt rlftrt i'~~ ri 1 t'l~'l 1~,1'~ ~'lil~ ~'~l'l -~l'tl'l :?.,fl 4fJFi 4c;0 ~l"lrl. ==,11 G~:iCI Ac, ri 700 ?~fl 11 '1'~,"$1 1879,:~ 5~:~ 101c~0"' 4 BEHE[,IJM HULFtTO UI'"~]T HI:t. .r. = ~TD. FF-'F'. = 1 A '.' TI]. [~Fw. = =,".-: F;'I' T. ;::'DF'. = 1 (ll'l r = 1;75 f'l.P-Rh =' 444 · 'Tr~. F~'I;'., = ,1,~ TT]:~. t'~E',/. = 7! P(T. F'E1P. = 10~'~ ? ~ , I , lleleelllllleele.eleeleell&eleeelllelel · -. 13)'ll'~ r~= i'~ ] fl fl l~fl ~l'~¢l ~l'! ~Ftfl ~Ft 40.f! 4%fi ~ftfl ~r! ~.flrl ~rl 70~1 7~ ~
