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Home My WebLink AboutGMC Data Report No. 166Vitrinite reflectance data of cuttings (2440' - 8680') and of-.core (7895' - 7905', and 7935' - 7943.5') from the Amoco Production Company Becharof No. 1 well. Received 27 September 1990' Total of 18 pages in report . Alaska Geologic Materials Center Data Report No. 166 o I N 0 I X le I lr,.,l! l 9 d 16- '3 tl~ II i I I T T I '~ Fa e r- ,:::: e r'l t:. F,". J I 0 0 0 I 0 '~ 0 - .cZ. ,3 1._ I'. 1,.~il ,.mI 3 4 0 4 ~' '5 D: c~c~c~c~c "16- f '1' 1' t I . r r -~. r -~- '~ 0 - ~, . 16- oo~oo ooooooooooooooooooo I I I f I ~,©, ,-,':',, ~ ,~ .~. 1 *'1 rr~ ,a- l Ib.~lll 6 0 I '.5 D~ 0 ,. 0 4 · · * w 00000 1 'Z - 6 0 0 ,,-7 16- 12- t i,' i, i i.,%l J 10- I i,,I,,, iIl ~'l"lll I o 0 12. I N ilP*l Ii II Il, II '1 I 0 ~000 0 IJ..O I I t I i 0 I 16- I ¥ 16- I T ! I i ~)0o '~.~. I.~1. - I · · 16- '-3. - 4- 0.,. ' if Ii i..~I i 6 S D; I I,. Illl I P e t- c: ® n f -. I id"ll ~l'll| I,.__I '! I ¥ d o ',- -.~.~- r ':, l,_ ~ 0 ! 0_30 ! T- 13. 0 .. 0 ',- T- 0 0 ! *,~0 Z-~ 18- 1 ~- O' · . ,, · · · i-I-ii I~J:"~ Iii ¥ 16- ID . i 'z ,::.,_,,,C',, "_t, ,'7.'_,, --, ,:', '1,. '1 '-' la" i I 'w. I I £ --I Em ~ t- ,::::: ~ t-I f .~ J ...... _ ........'-3 I'-" II "-' cCc;SSS 16- 18- United States Department of the Interior GEOLOOICAL SURVEY BOX 25046 M.S. c~O DENVER FEDERAL CENTER DENVEI~ COLORADO 80225 John Reeder P.O. Box 772116 Eagle River, AK 99577-2116 17 September, 1990 John: I am returning the prepared samples I borrowed from the state back in January. Enclosed, also, you will find data and histogram sheets for almost ail the samples. Some samples did have organic material I deemed good enough to measure. For the most part, the samples were good and the results are evident, at least individually. Taken on a well-by-well basis several were difficult to make good sense out of from an organic petrology point of view. The shape of the histograms is a good general indicator of consistency of the organics contained within and in the confidence I had while examining the samples. My technique was to measure at least 50 organic grains, while trying to stay within a narrow range. This becomes difficult with increased vitrinite reflectance, and the histogram spread increases. With adequate material and consistent rank (contamination from uphole'cavings can introduce diverse groups of organics) the histogram will have some.kind of a bell curve shapeL.~ Gaps in the histogram, relating? to' mUltiple-popul~t'i~n~'>%f "organics,-- are a problem and 'dilute 'the strength of the mean value as a good measure of the thermal maturity. These gaps are more common at the higher ranks, (> 1.5% reflectance), but occur at lower ranks when insufficient material exists or there is contaminationin the sample.-' I admit to certain biases against Samples prepared by people other than myself, and these samples were made by several different companies. I feel I lose too much control over the processing of theCuttings and do not have the confidence in other people's dedication to the work. I hope'these data can be of some use to you. If I can help by providing additional information, please let me know. Thank you for providing the samples, and for your assisstance while I was visi.t.ing. GMC Data Report No. 166 Page i 8/18