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Home My WebLink AboutGMC Data Report No. 007" SD 32 (Rev. 4.67)-PrJntud In U.S.A. SHELL DEV£LOPMEN'iI' COMPANY REFERENCE TO' ALASKA EXPLORATION DIVISION D^T~ ATTN: GRANT VALENTINE ~:OM DECEIqBER 6, 1976 GEOCHEMICAL SERVI CE SUBJECT SOURCE ROCK AND MATURITY STUDY, STANDARD OF CALIFORNIA NORTH FORK UNIT NO. 41-35, SEC. 35 T4S R14W, SEWARD ~ COOK INLET BASIN, ALASKA . . . I attach a letter that you may use to transmit the results of our geochemical study to the State of Alaska. This information should suffice to comply with our agreement to release the results of our studies to the public. ~ CASTA~O~ Attachment JRC/vl cc' J. R. Casta~o (w/attachments') SOURCE ROCK AND MATURITY STUDY STANDARD OF CALIFORNIA NORTH FORK UNIT NO. 41-35 SECTION 35 T4S R14W, SEWARD B & M., COOK INLET BASIN, ALASKA DECEMBER 6, 1976 Vitrinite Reflectance S.tud~/ A total of 13 ditch samples were prepared for vitrinite reflectance study. For the shale samples, the vitrinite was concentrated by non-oxidative acid solution of the inorganic matrix. Standard A.S.T.M. procedures are followed for polishing and examining the specimens. The results of the study are summarized on the individual histograms and on the table shown below. On the histograms, each vitrinite reflectance reading is shown to the nearest 0.01% reflectance in oil (%Ro), and the values are summed up for each 0.1% Ro group. In the table, the maximum and minimum reflectance give the extremes in the readings, the (arithmetic) mean Ro is given with the limits of uncertainty calculated for 95% confidence limits. TABLE 1 VITRINITE REFLECTANCE STUDY I)EPTH,FT. .LAB. NO. SAMPLE TYPE MAX RO% ,MIN RO% MEAN R0_+95% CONFIDENCE LIMITS 11990-12110 13116 Ditch .54 .28 .39_+.02 11990-12000 13107' Ditch,Coal .45 .31 .38+.01 12090-12100 13108' " " .63 .32 .45-+.02 12230-12240 13109' " " .62 .43 .53-+.01 12230-12420 13117 " .67 .27 .42+.03 12240-12250 13110' " Csal .67 .27 .49+.03 12330-12340 13111* " " .58 .39 .51+.02 12400-12410 1 3112' " " .66 .36 .53+.02 12540-12590 13118 " .80' .26 .43-+.03 12570-12580 13113* " Cbal .'62 .37 .53+.01 12670-12680 13114* " " .58 .37 .50_+.01 12670-12810 13119 " .60 .31 .39_+.02 12730-12740 13115' " Coal .69 .36 .51_+.02 * These samples are coals, which were prepared without using any acid treatment. SOURCE ROCK AND MATURITY STUDY STANDARD OF CALIFORNIA NORTH FORK UNIT NO. 41-35 SECTION 35 T4S R14W, SEWARD B & M., COOK INLET BASIN, ALASKA DECEMBER 6, 1976 Page 2 In order to obtain better data from the very small samples, we hand picked coal chips from several intervals, The data from the coals .provide good data needed to determine the burial history. Some oi~ the methods used to determine the burial metamorphic. history are summarized in the attached table taken from a publication by Hood and Casta~o. These methods are related throuqh the use of the LOM (Level of Organic Metamorphism) scale reported by [{ood et al in the AAPG Bulletin. The techniques for measuring the level of organic metamorphism reflect the irreversible effects of temperature and time, hence, of thermal history. Therefore, the reflectance data can be tied readily into the LOM or coal rank scales. Source Rock Richness Stud_s_ To evaluate the organic richness of the ditch samples, we deter- mined both their organic carbon (Corg) and the effective carbon (Ceff) contents. Organic carbon, or acid-insoluble carbon, represents the total amount of organic matter in the rock, and it is determined by measuring the total amount of carbon dioxide evolved during combustion of an acid-treated s amp 1 e. On the other hand, effective carbon reflects the fraction of organic carbon which is thermally convertible to petroleum. As estimates of effective carbon, we used two laboratory pyrolysis procedures. One method, pyrolysis- fluorescence (PF) is a rapid means of evaluating the petroleum generating potential, by measuring (in arbitrary PF units) the amount of fluorescing bitumen generated on heating. PF values in rocks can range from zero to several thousand units. For additional data, refer to Heacock and Hood (1970). The second method, pyrolysis-FID (P-FID) provides a measure of the amount of organic matter which can be converted thermally to hydrocarbons. A small amount of sample (less than 200 milligrams) is heated in a flowing stream of pure nitrogen at temperatures increasing from room temperature to 7507C at a rate of'25°C per minute. The volatile organic compounds are distilled~t temperatures less' than about 300°C. At higher temperatures nonvolatile organic matter is pyrolyzed to form volatile hydrocarbons. The distillation (D) and pyrolysis (P) products are carried (by nitrogen) to a hydrogen flame ionization detector (FID). The FID signal can be converted to precent hydro- carbons or percent carbon by calibration with a petroleum wax. For further · data on the method and instrumentation see Eggertsen and Stross (1972). Non-carbonate carbon was run on sixteen ditch samples, (Table 2). These samples were mostly shale and siltstone, as most of ~hat little coal there is was utilized for other studies. SOURCE ROCK AND MATURITY STUDY STANDARD OF CALIFORNIA NORTH FORK UNIT NO. 41-35 SECTION 35 T4S R14W, SEWARD B & M., COOK INLET BASIN, ALASKA Page 3 TABLE 2 DECEMBER 6, 1976 DEPTH, FT. NON-CARBONATE CARBON ANALYSIS LEACHING'FACTOR(I) WT. % ORGANIC CARBON, CORG(,.2...) 11900-11910 .8057 11910-11920 .7558 11990-12000 . 8223 12000-12010 .7609 12090-12100 . 7716 12240-12250 .7732 12330-12340 .8013 12340-12350 . 7714 12400-12410 . 7752 12410-12420 .8157 12540-12550 . 7830 12550-12560 . 7289 12570-12580 .7525 12580-12590 .7790 12680-12690 . 7722 12800-12810 . 7562 2.29 1.65 1.86 1.58 1.54 1.45 2.48 2.42 3.09 2.3O 2.02 2.23 2.16 2.22 1.68 '1.74 (1) WT .Leached Sample Wt Original Sample (2) Wt. Carbon Wt. Original Sample X lO0 Pyrolysis -FID Data are summarized on the attached source rock log 'plotted at a scale of one inch equals 100 feet and on Table 3. As shown on Table 3, we ran coal and shale samples separately for P-FID. However, we ran the original unpicked sample for pyrolysis-flurescence. And, as only a few coal chips ran-gave a very high reading, the PF and FID values do not correspond in all cases. SOURCE ROCK AND MATURITY STUDY STANDARD OF CALIFORNIA NORTH FORK UNIT SECTION 35 T4S R14W, SEWARD B & M., COOK INLET BASIN, ALASKA NO. 41-35 Page 4 TABLE 3 PYROLYSIS-FID STUDY DEPTH, ..F~T_. SAMPLE TYPE llgO0-11910 Ditch, picked shale .044 11910-11920 " " " .031 .11990-12000 " " Coal .018 12000-12010 " " Shale .020 12090-12100 " " " .030 12100-12110 " " " .033 12230-12240 " " Coal .009 12240-12250 " " Shale .48 12330-12340 " " " O. 037 12340-12350 " " " .028 12400-12410 " " " .038 12410-12420 " " " .031 12540-12550 " " " .'024 12550-12560 " " Coal .044 12570-12580 " " . Shale .067 12580-12590 " " " .022 12670-12680 " " " . O19 12680-12690 " " " .023 12730-12740 " " " .020 12790-12800 " " " .035 12800-12810 " " " .113 D/P RATIO DECEMBER 6, 1976 TOTAL HC YIELD WT % 1.939 2.550 5.545 1.912 0.417 0.497 2.564 0.197 O. 838 1.455 .768 1.225 0.707 0.929 Oo 324 1.773 .624 1.464 1.234 1.031 .349 References Eggertsen, F.T. and Stross, F.H., 1972, Flame Detection Method for Determintlng Organic Carbon in Water, Anal. Chem. V. ,44 P709-714. Heacock, R.L., and Hood; A., 1970, Process for Measuring the Live CarboN' of Organic Samples, U. S. Patent 3,508,877, April 28, 1970. Hood, A., and Casta~o, J. R., 1974, Organic Metamorphism: Its Relationship to Petroleum Generation and Application to Studies of Authigenic Minerals, CCOP Tech. Bulletin,-Vol. 8, P.85-118. .. LAB NB. - 13107. L@C^TI@N '35 40 ST^TE - ^K .. · · ,. iS. tn. Z O 13. .< > 11. 121 ~o. !1. q. d d d d d d d d - J - J - PEROENT Vi-TRTNZTE IREFLECT,N'~i]E HZSTEIGR~,M (5'.; I '" COAl. SPORE' ' THERMAL ... CARBON- ALTERATION VITRINITE LO/Vi RANK BTU ,ZATION INDEX REFLECTANCE · suoo^~cx10-3 ~VM I- NONE .o~o~ ~ms~u~ COAL J~EL[OWJ LIGN. . 2-SLIGHT 4- (~ROWN- . - YELLOWJ BIT. B -I0 . ' II --2.5 8- C - 12 L{45) YELLOW HIGH_ ~ 13 - VOL B- ~{40} 10- BIT. ~.14 . _ --15 TO DARK ~ 1.0 I-0~ ~30 'BROWN -- 3-MODERATE = 12_ MV BI[ ~ 25 - 20 ~--3.5 JO~OWN~ !.5 1.5~ ~ _ LV .BIT'_ ~ 15 --3.7 - · - ~ - -- 2.0 · Z0~ 14- - - - SEMI- --10 - ' ANTH. - ' 16- - BLACK -- ~ 4- STRONG - 2.5 - . ] ISLACKI ~ S.0~ 18- ANTH. - 5 ' 3.5~ . 4.0~ - 20 - Figure VII-~. Some scales of organic metamorphism (Flood et aL, in press). C@!.,,PANY - STAI',DARB DF .BAI TF@RNTA ~.,"ELL BR @UTBRDP - NBRTH F@RK NB. 41-3S DEPTH BR SA~i F I~. - 12'230 122ZlO LAB NB. - 1310Cl L@BA"FZ~ - 35 4S 14~ STATE- ^K - 20. 18. 1'7'. 16. 15. fLO Z ~..4.. El O-il! l.t_ 3. 2o lo Oo d d d d d d d d d d - .4 ........ ED~,;~P^NY - ST^ND~RD DF E^LZF'IgRkEA ~'/ELL I~ DLITCRBP - NDRTH F@RK NB. · DEPTH @R S^k4F~ ND. - 12230 1242O L~B ND. - 13117 L~C^T'~N - 3S 4S 14~ STATE 18. 16. 2°¸ lo ' 23. d d d d '.- d'":.'.-d ·.. · ... . i PERCENT o ,, 21. 16. 1o Oo C~,k,PANY - STANOARO @F CALIFE~RNIA ~'IELL BR @UTCRDP - I',E)RTH F@RK ND. 41-85 DEPTH BR. SA~°! F N~ ' 12240 122SD . LAB !~. - 13110 L@CATIBN- 3,S 4S 14','/ -.. STATE- AK d 6 d d 6 6 6 6 ..6.. o ,-., ..-, · ........ ~ . ... PERCENT " VTTI;'TklTTF PFFIFRTAN~F NTRT~RR^M ED,,;IPANY STANDARD @F CALZFDRNZ^ ~':'ELL BR E)UTDRBP - N@RTH F-E)RK NE). 41-3S ~ DEPTH @R SABPI F'. ND. ' 123313 -1Z-24D LAB NE). - 13111 LDEATI@N- 35 4S STATE- AK 18. Z 12] H ~.~. I-- . 12I IL 5. 3o d d d d d d o 21. ., CDWPANY - STANDARD DF C^! TFDRNT_A t'IELL 5R DUTCRDP - NDRTH FDRK ND' 41-35 DEPTH DR' S^t~PLE ND. - 1240D 12410 · , LAB N@. - 13112 LDCATIDN - 35 4S ST^TE- AK · . · V]]TRINI'TE REFLECTANE:E i-~S~RAM CBi,,~PANY - STANDARD BF CALIF@RNIA ~'JELL BR BUTCR@P - N@RTH F@RK NB. 41-3S DEPTH BR SA PLE - 12540 12sqo LAB ND. - 13118' LDBATZ@N- 35 4S lZl~ STATE- AK 20. 1'7'. 16. ti} Z ~4. 121 < ,12. LOil ~ ~o. d 5 d d d d · · d .... d ' d d. - ; - PERDENT '.. . VZTRINITE REFLECTANCE HZSTDGRAM CB~¢,PANY - STANDARD BF CALIFBRNZA 'l'~F1 ! BR BUTCRBP - N@RTH F@RK NB. 41-35 LAB NB. - 13II3 LBEATZBN - 35 4S DEPTH BR SAMR_E NIB. - 12570 -, STATE - AK :21. IS. FF m El 1o. [.fl 7. i I I I i ,. I I i~ t I I I I I I I I ....d" d- d d_. o d d d d 6. ,-, ,-; ,., PERCENT . VTTi:::~TNTTI:" ~FFI I:-RT^I',.II-",~' . · · CF~/P^NT - ST^NDARO @F C^LIF@RNI^ .. ,. '. LAB NE). 13114 ?fELL IglR IIlTC, IR~:~' -:- NINTH FEIRK ND. 4]'-35L@BATI@N - 35 4S DEPTH @R S^,~,~i F NB..- 12137012830 ST^TE -.-/~!~ _ · . , · , . 12] ~o. '- lo 18. 17. 2. C@!,ziPAI~( - STAIxDARO I~F CALIF@RNIA ~: ~'~F!! DR @UT[:RBP - NBRTH F@RK NB. 41-35 gEPTH I~ SA~zl~ F N~. - 12G70' 12810 · LAB lq~. - 13I ICl L@EATIIBN - 3,5 4S STATE- AK 31. .. EEI}.,,~P^NY --STANDARD BF EAI_'I'F@RKEA '.. ,,,FI I ER Bt. ITCR@P ". hlBR~. F@RK NB. 4.1'-35 · · . · · · . : i~B NB. - 131 IS . "' · · LBF_ATIBN - :3S 4'S i4~.." ~ DEPTH ER S~o~ F I~. - 127313 127413 _.. ST^IE - Al< ' .~ 22. 20. OC 8. w m~ .. 1 o O. DBt,,~ANY -' STANDARD @F CALIFORNIA ~'~F1 ! ~R @UTCRDP - N~RTH FDRK ND. 41-35 DEPTH DR SAt,~:L.E ND. - 1 lqO0 121 iD LAB NB. - 13118. LBCATZ@N -35 qS 'STATE - AK -. · d d d d d d. ..d d d d ..., .,-; ,.-, ,.-, .,-, ,-; ..... ~' PERCENT : .,. I 1 11900 12000 12100 12200 ,I ~-12500 600 11900 12000 12200 12300 12400 12500 12700 12800 RM-IO0 (4-71)~.~ RM-IO0 (4-71) SHELL OIL COMPANY Ii SHELL OIL COMPANY ' SOURCE ROCK LOG SOURCE ROCK LOG STATE OR PROV, ; STATE OR PROV. il Alaska Standard of Californi~OMPANY Alaska Standard of Californi~OMPANY i~ COUNTY COUNTY North Fork Unit N~.1.-35 North Fork Unit NO.41-35 T. R. T. R. Anchorage Basin Anchorage Basin I i FIELD OR A~REA I I FIELD OR AREA _ _ j .... I_ _ _j .... i_ _ I I I I -- --~--- -q-- --~--- I SURVEY BLK. I SURVEY BLK. ELEV. COMM. COMP. (n i ELEV' COMM. ' COMP. ELEC. LOG ELEC. LOG T.D. RADIOACTIVE T.O. RADIOACTIVE MICROLOG MICROLOG ' 'LATEROLOG ~ ~ ~ 'LATEROLOG ' '.. ~ ~ ~ ~ PRoDuCTION ' , ~ PRODUCTION ' ' ~~ Std. = 36 ~ 2 units. Scale is 1" = 100'. Zero to ' five is plotted as five by m~ Scale is 1" = 100' ~ plotter. .m <~ ~ :m. ~< . SAMPLED BY: ~ ~ SAMPLED BY: ,, ~ DATE ~ DATE , ~ ANALYZED BY: J. Mohundro ANALYZED BY: M, L, weiss ~ DATE ~ DATE ~ PLOTTEDBY: N. West ~ PLOTTEDBY: N. West ~ DATE ~ ~ DATE _ ~ TOTAL F'L~E~C'ENT UNITS ~ ~ ~ _ ~ ~ REMARKS , ., --,-- ...... ~ :J---~ .... .~-t ,~ REMARKS _ _ . . . m . -- 1'1' . "'~q~:i:-"' J' ",, ' ~ ~ t, ~ ...... ~:,i ---~-~ ~ ~. ......... l,j~ [' - ~ .... ~-'-~,{,z~.{~l--l-?,t'~?,~ ....... [lt~t-- ~ ','~ TUT ~ ~J,?~--I-'t 'I~LI ~-- - - -~ =~'. ~~tLL--F&I!r-~ --~?r~? ........ ~ ~ Ol~'-H-~~'O,.'-I !-it, q ~JO--i~'~ h~: 0 .... ~.- ~ '-~.+:---~-' ~1+~; ~~ ....... ~ __~_~__$ ', ~ _~L~ .... ,_ I ...~ ~ ..... .-~, , .~-,=-, ~-: . ,"-~~ ..... J ~--~.1. ~..., ,--. . --,-='-:,, ~ .,". ,~ , ;:. .......... ~., ' ~. . --~--~-~-'.'' .... , ,~ ~.~ '-,-~'- t ",' ~, ~ __ ~t~~[ .... z ~ .,t :. . .... ~- ~ 11900 ...... 11900 12000 : ;i~;,'-:'T--i l I ! 12000 --