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Home My WebLink AboutGMC Data Report No. 083Rock-eval pyrolysis data and interpretation for the Alaska Consolidated Oil Iniskin Unit Zappa No. I well. Received 22 April 1988 Total of 7 pages in report Geologic Materials Center Data Report 83 RESULTS AND DISCUSSION' TOC/ROGK EVAL Geochemical logs, tabulated TOC and Rock Eval data, and pyrograms are provided for each well (Appendices 1, 2 and 3). Geochemical data are expressed as' TOC $1 S2 S3 Tmax PI HI OI = Total Organic Carbon, in weight percent = Thermal extract of mobile hydrocarbons, in mgHC/grock = Hydrocarbons generated from kerogen during pyrolysis, in mgHC/grock = CO2 generated from kerogen during pyrolysis, in mgCO2/grock = Temperature of peak generation during pyrolysis, in oc = Production Index = S1/SI + S2 = Hydrogen Index = 100 x S2/TOC = Oxygen Index = 100 x S3/TOC W_ell LCI-Tnimkin Thermal Maturity The five samples analyzed show increasing Tmax with depth, from thermally immature at 2000-2050' (Tmax 432oc) to within the oil window at 10770-10800' (Tmax 443oc). Production Index (Si/S1 * S2) also shows progressive increase with depth. Organic Richness and Ouality TOC values for the five samples range from fair (0.50) £or potential source rocks to good (1.62). All samples, however, show no current oil proneness, with low SI, S2 and Hydrogen Index (52-124). The two deepest submitted samples may be mature enough to have reduced their oil proneness by having generated and expelled hydrocarbons, but this is unlikely. GMC Data Report 83 Page 1/7 Well LC! lniskin TABLE I Resutts of Total Organic Carbon Analysis and Rock-Eval Pyrolysis Depth TOC S1 S2 S3 Tmax Production (ft) (~Vt.%) (rog/g) (mg/g) (rog/g) (°C) Index -~,, c ;'J~l .oo3 2000-2050 0.50 <0.10 <0. i0 0.30 432 --- =~,r.~-010 55.10-5570 0.78 <0.10 0,40 0.48 434 --- ~,.~9-~1 l-I 7,170-7510 1.62 0.28 2.00 0.59 439 0.12 ¢,l~-01tl 9540-9570 0.93 0.30 0.83 0.22 443 0.26 ~j,jg-021 10770-10800 0.88 0.54 0.87 0.24 443 0.38 tlydrogen Index ___ 52 12-t 89 99 O×ygen Index 60 61 36 24 28 Unable to determine due to insufficient S2 yield, multiple peaks, etc. GMC Data Report 83 Page 2/7 GEOCHEMICAL LOG.~.~.~.~: LC~In|skin ! II I II I II I '~ I- I I, !, I, 1,' I ' ' I,l,l,l,'.., .! h~ ~HYDROCARBONS1 - z ~ > SOURCE BED POTENTIAL MATURITY ~ INDICATIONS m ~ ~ T.O.C. (wt. %1 S2 (m~g) S2f S3 ~ ~ 5 4 3 4 5 ~0 20 ~ 25 5 15 I~ 2~a~ ~3" 06 ~0'410 30~ , ,,., ,, ~l~l~lmfllllflm~ll , , ,., ,.,,,.,,, , ,~ ,o ,~ .,,,. II I - ., .- :1 I I II III I il m I I I~1 I CO"GLO"1[RATE -5 SHALE-'SILTSTONE ;'X HALITE SANDSTONE ~ LIMESTONE ((' ANHYDRITE S1 = Free Hydrocarbons Presenl ~n Rock S3 = CO, from Ke[oqen Pyrolysis COAL ~.~ IGNEOUS S2 H?d~oca[bons t~on~ Kefogen PY~O,TS,S H-ldfogen index : S21 [.D.C. CASIN~ CEMENT ~ DOLOMITE = . ' CHERT ,~ VOLCAt~ICS /,. .r-"~.., 2.4, - [:, = 9 9 9 9 Fzr: fiTTE,.:~,-.-T - __ -. :~w,~, ! U!',I= 2'-?' i Ut;' OTT --:-~I..,HT l,J,~= ":' ~:ooo Page 4/7 L..o_,t- I ,~i s t<.c,., ! i TOC = 9.7,S !.,iT = i£9.3 THAX : ~.s9 nEiZ-'-r:EES C 3£= +6. 421E-'.-'-'2 SU~'t= 5'-Z: '---'~ q2'~'c-!-'-~.! c:~.~- +.S,.s::,-/E+F;-" --= +-a ?645 .... "t-i ~..N O [,IH , i i !.~ c u .-~ u,, ! - -lq.-/o-'l 5 t 0 ' GMC Data Report 83 Page 5/7 .3:2 2:2 .50% 3._=,3 - _.~, .~._. /~ , -- -I '-.~ 7>!AX : 448 r',?::~zz ~...i. ! .~-i ..- _ *.,. ~.,... _...,_ +" ':"-~'--:--a! SUM: ~ -' ~!:= -,-';' 2.Z:2E-a.~ '--"'~,: · - .... z,u,,= +4. 9255+03 'J i"i E .... i ~:_,,q ia:3 u ~-.'_: :_-: U ['i ROC:~< I o~1-10 - to~; o O T f GMC Data Report 83 2~ 39fi - ~& / Page 6/7 e~r n~t~ I~nnrf R3 O::.::,.~:----e[': Ir-:---_-:.-'-:-'::-: (..?,:q.-'":;) Pa_qe 7/7