c i
February 1985
RKER.85.035GEOCHEMICAL INVESTIGATION OF CRUDE
OIL SAMPLES FROM WELL 6H07/9-1NORWAY
byF.M.van der Veen and J . Posthuma
This CONFIDENTIAL report is made available subject to the condition that the recipient willneither use or disclose the contents except as agreed in writing with the sponsoring party.
Copyright is vested in Shell Internationale Research Mij. B.V., The Hague.
KONINKLIJKE/SHELL EXPLORATIE EN PRODUKTIE LABORATORIUM
RIJSWIJK, THE NETHERLANDS(Shell Research B.V.)
u\
February 1985
RKER.85.035GEOCHEMICAL INVESTIGATION OF CRUDE
OIL SAMPLES FROM WELL 6407/9-1NORWAY
byF.M.van der Veen and J . Posthuma
Inves t !ga t i on:9.5.5142
This CONFIDENTIAL report is made available subject to the condition that the recipient willneither use or disclose the contents except as agreed in writing with the sponsoring party.
Neither the whole nor any part of this document may be reproduced, stored in any retrievalsystem or transmitted in any form or by any means (electronic, mechanical, reprographic,recording or otherwise) without the prior written consent of the copyright owner.
Neither Royal Dutch Petroleum Company nor The "SHELL" Transport and TradingCompany p.I.e. nor any company of the Royal Dutch/Shell Group will accept any liability forloss or damage originating from the use of the information contained therein.
Although SHELL companies have their own separate identities the expressions "SHELL" and"GROUP" are used for convenience to refer to companies of the Royal Dutch/Shell Group ingeneral, or to one or more such companies as the context may require. -
Copyright is vested in Shell Internationale Research Mij. B.V.. The Hague.
KONINKLIJKE/SHELL EXPLORATIE EN PRODUKT1E LABORATORIUM
RIJSWIJK, THE NETHERLANDS(Shell Research 8.V.)
lrl * mm
CONTENTS
1 . in t roduct i on 22. Conclusions 2
Table 1 Geochemica l d a t a of c rude o i l s
Figures 1-4 Gas chromatograms of saturatedhydrocarbons
5 C7 distributions of crude oil6 C15 and C30 ringdistributions7 Sterane and triterpane fragmentograms
ftKER 85.035
- 2 - CONFIDENTIAL
GEOCHEMICAL INVESTIGATION OF CRUDE OIL SAMPLES FROMWELL 6 4 0 7 / 9 - 1 , NORWAY
To invest igate the general character of acrude oil sample from well 6407/9-1(rftsample,1600M)the API has been determined and thesaturated fract ion of this sample(0MC 3359) has beenanalysed as requested in telex for 090804 of 9.8.84. Acomplete geochemical analyses has been carried out on aPT sample from the interval 1631 -1637M(OMC 3367) whichhas been sent l a t e r ( fo r 120906 of 12.9.84).
The resu l t s of the geochemical analyses aregiven in Table 1 and Figures 1-7.
The gas chrornatograms of the whole crude and ofthe saturated hydrocarbons show a gap between C10 andC15 while the crude has a high percentage of l ightfraction (<120C). This is rather unusual and i t cannotbe excluded that we are dealing here with a mixture ofa condensate and an o i l .
Assuming that the l ight and heavy fractions havethe same or igin , the complete oil analysis carried outon the PT sample indicates the following:-the C7 d i s t r ibu t ion indicate that th is sample has
not been bac ter ia l ly degraded,- i t has been expelled from a mature source rock
containing s t ruc ture less organic matter which is ofbac ter ia l ly reworked phytoplanktonic origin,
- the C7 d i s t r ibu t ion and the pristane n-C17 alkaner a t i o suggest a t e r r e s t r i a l influx to the organicmatter .
RKER 85.035
- 3 - CONFIDENTIAL
Table- 1 GEOCHEMICAL DATA OF CRUDE OILS
APIs p e c i f i c g rav i ty%v. b o i l . 120 deg C% sulphur
ppra V as metalsppm Ni as metals
Pristane/PhytanePri stane/n-C17Phytane/n-Ci8
C7-distributionC7-alkane
n-C7raonobranchedpolybranched
C7-alk/naphthenen-C7naphthenesbranched alkanes
C7-alk/napht/aromn-C7naphthenesaromati cs
C15-distri bution1-ring2-ring3-ring
C30-distributi on3-ring4-ring5-ring
C29 VR/E (DOM)
% asphal tenes
^saturatesJaromatics^heterocora pounds
<5 13C o / o o
- not determined
OIL SAMPLES WELL 6407/9"1,NOR WAY1635M(RFT) 1631-1637M(PT)OMC 3359
41 .20.8193
2.11 .00.5
OMC 336742. 2
0.814817.60.3
2.21 .00.6
49101 1
205822
40564
384220
254629
0.76(64)
622414
-28.6
RKER 85.035
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DPS CHROMPTCGRPM SR1URP1ED HTCRGCPRS3NS
FIG. 1. NCRWRT 6407/9-1 1635 M CMC 3359
'! i ., tfå
DR5 CHRGMRIOGRRM CF SfilURRTED HTDRCCfiR5SNS
FIG, 3, NORWflT 6 4 0 7 / 9 - 1 . 1 S3 i - 1 S37 M, GHC. 3367
IR \S> c P - ^ & K? .«- u 3 t J s
o o o o o o o o o2R
o o o
LflNDPLANT-DFRIVEO CRUDES NITH SUBSTRNTIfU RES IN CONTRIBUTION TO SOURCE MPT TERCRUDFS OF MIXED ORIGINCRUDES DFR1VED FROM SOM flND/OR RLGflt MRT TER
LE Gl-'NDQ - NGRWflT. 6 4 0 7 / 9 - 1 . 1631-1637 M,OMC.33G7
1680
3.6-1
MID røKS rHfifniATOGRAM DATA: SER8955 #1ENHANCED (366 IN 0T)
£A«PLE: NORWAY: 6407/3-1 1G31-1637 (1 OMC 33S7 BC 13/138/.4ULRANGE: G 2s, 33 LASEL: N 6, 4.0 QUAN: A 8, 1.0 BASE: U 28, 3
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3 copies Shell Forus ep epxe/1(epxt/1 epxf epfc/2epff/11
3 copies SIPM The Hague EP/11/13