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Home My WebLink AboutGMC Data Report No. 170Vitrinite reflectance data of cuttings (5200' - 15310') and of core (7902' - 7918') from the Atlantic Richfield Co. Itkillik River Unit No. I well. Received 27 September 1990. '' Total of 27 pages in report · · Alaska Geologic Materials Center Data Report No. 170 .,"?J'3: " r?.'.' ~0 0 0 6O 0 Q. I -T #1 It C,, 7 5 ::.-S El: O, 0 7 10' 6O 0 i 11% Il ~1.""- I1% Il cPO0 I'" ':';' Ei '--' El' ,::;,:Cc;,:::;,:::; 16- 12- .,. I I' i ¢" "-2, ' "' ,"', '-"'", · ,,-.,':._',, ,._,, ._ .¢,,, , .5 ' 'C'/., , % , I P e r- c:: e r'~ t... R m J 6O 12- ,~'i I O, g 3 elellll Fa e.. F (::: ~ n f... I1.. II '-- ~ I'T! Z 13 10- 12- ,:.,.:.,:.d,.:,.:d,.:,.:ddd,:.c;d,:.,.:.,:.,.:,.: I R ITl J · · · · 6 0 0 '"'l""""' ..... · 4. .._3 ,-:c;c;c;,-: 16- ,t-,_,,',..L,, I 1 1 T ~ i J 0 I I~1 -.. r ... 18' 12' 'i1.1. i I Per- c::®r-! J' 6 Ct C) c) Ix:l 0 ~-~ 22,'-- '-' :_-:, I ,,-¢- '1 ,. ~ m 0 0 1 6 0 [I "' 0 CZ.. I N P¢I'- C:®I'i f o# .. · . , . .. :,.:;!.; ,. ,..: ,..: ,...: .,..: .,. 16- 1 '2 ' I I I 'il- I i · 'lI,i. i P e F ,'.'_:: ® F! Z .. .,. .o 9F'i ~i 1 6 0 '--" ...... . ,:_., 4 '1 I t k:[ I I [ k: R v r- f,,,,~ r, 1 ,3 7 '~ ' . _ ,:, D, O, 0 4 P~f- c::®n f'.. I ! I i, I . ! ~ m 'm'IX.C) ~ ., 0 6 0 Z' 0 I · 1 4 ':' S F,? · IIiiiii ,.:,.:,.:,.:,.. ]2- I I I I .i,,,I I~'lll I1% II .~ ¥ z 8.6 ,~'t It kill[ '1 ~ !~ ':" El' 12' i I i I I' ~ rrl ! ¥ L.J I t:.. k:[ I I [ k ,.:,.:,.:,.: 16- i,.l"ll I~"111 ¥ 6 0 '8 '~ tllll elelllllllel 16- elelltlllllllelllltlllllllllllllllll i I J I 1 I i i " C:) C) '," Q,. 0 I 0 I >. 2. 0 - -I P e f- c:: ~ r'l t:.. Z J ~ 0 0 1 6 0 '5); · 20- ,- t h::[ 1 S D: u k i I i 1 II,llll $ I ~ ¥ Z. g Ci .~1 1 ~ n J 16- 12' 'll'l. i 'll,i. I P e.. F ,::::: e l"l '!:.. Rm r_.~..-- .',""IX, C) J I N I I P 6 r- (::: ~ f"l f.. R m ¥ Z' >~ 0 0 1 6 0 9 4 #I I t k[ I I u k 1 . 9 4 S D: 15- '12' ~ i i I' i I ! R rn q.. · ~ ! .iI ¥ d 6O 0 I r~ 0 12- I I I I i i I i ~ FFI I j..~ d C) 9 E~ 16' 12- i1,./I ¢._',,, ,o ..: -. .:. ~ 0 0 1 6 0 ! 0 ~L I 0 I X I 16- 12- ,; 0 1 6 0 1. 0 I g CI 0 '1 Mn; 16- 12' .o. ¥ Z ~DO0 v- 13. 0 J 0 R i I111111 ~. r iI 10- 12- ¥ Z o IN REPLY II~Id~ TO. United States Department of the Interior OEOLOOICAL SURVEY BOX 25046 M.S. ~O DENVER FEDERAL CENTER DE~P~ COLORADO 80225 __ 17 September, 1990 John Reeder P.O. Box 772116 Eagle River, AK 99577-2116 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 all - 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 becom~'"difficd!t Wi'th' incre~'Vi~ini~e~ ~efieCt'ance~ 'and-the.. histogram spread increases.. With adequate material and consistent rank (contamination frol uphole carings can introduce diverse groups of organics) the histogram will have .some kind' of a bell curve shape. Gaps in the histogram, relating~:to:multipler~PoPulati0nZS~of?organics~'are'~.:'~;'problem'and 'dilut$'%he':-.' strength of the mean value asa good measure of the thermal maturity. These gaps are more common at the higher ranks, (> 1.5~ reflectance), but occur at lower ranks ~hen insufficient material exists or there is contamination in 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 the cuttings 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 kno~. Thank you for Providing i theii-~samPleS,'. and for your assisstance ~hile I was GMC Data Report No. 170 :.::"~::~.~:;.'/,,~.... :~ .~ ..".~?~:~;..::i.:i~:'::. :_.:~;~ "'/.: ".."'...:;:;..,;:i.'."i.' . i~..~-~._~. ,.-..:,..:~._~,~,~.~:.~ ...~ .... .. . Page 27/27 i- -. .:... ".'~'.'-.,'. ,_.:::::".i :':-~.-,.,i .'....'., ::~.~i:,.~' ',.;'-'--" -_".'.~;~.:.~j._~ '-' .'.~ ~--~:. _:.