MOV 1»
i'-
October 1984
RKER.84.162
GEOCHEMICAL ANALYSIS OF W O KIMMERIDGE CLAY
ROCK SAMPLES AND OF T.vO CRUDE OILS FROM
WELL 2/5-7, NORWAY
by
F.M. van der Veen and J. Posthuma
This CONFIDENTIAL report is made available subject to the condition that the recipient will
neither use or disclose the contents except as agreed in writing with the sponsoring party.
Copyright is vested in Shell Internationale Research MM. B.V., The Hague.
KONINKLIJKE/SHELL EXPLORATIE EN PRODUKTIE LABORATORIUM
RIJSWIJK, THE NETHERLANDS
(Shell Research B.V.)
October 1984
RKER.84.l62
GEOCHEMICAL ANALYSIS OP TWO KIMMERIDGE CLAY
ROCK SAMPLES AND OP TWO CRUDE OILS PROM
WELL 2/5-7, NORWAY
by
P.M. van der Veen and J. Posthiuna
Investigation 9-5.5091
with co-operation from R.P. Stuifzand
This CONFIDENTIAL report is made available subject to the condition that the recipient will
neither 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 retrieval
system 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 Trading
Company p.I.e. nor any company of the Royal Dutch/Shell Group will accept any liability for
loss 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 in
general, 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 PRODUKTIE LABORATORIUM
RIJSWUK, THE NETHERLANDS
(Shell Research 8.V.)
a
- II -
X. Introduction
p. Results and Discussion
3. Conclusions
Tables 1 Geochemical data of crude oils
2 Geochemical data of extracts
3 Maceral description
Figures 1-4 Gas chromatograms of saturated hydrocarbons
5 C7 distributions of crude oils
6 CIS and C30 r e d i s t r i b u t i o n s
7-10 Sterane and triteroane fragmentograms
RKER.84.l62
Confidential
- 1 -
Confidential
GEOCHEMICAL ANALYSIS OP W O KIMMERIDGE CLAY ROCK
SAMPLES AND OP W O
CRUDE OILS FROM WELL 2/5-7, NORWAY.
PRODUCTION
analysis have been carried out on the following
- -i rock samples and two crude oil sample from well 2/5-7
•--Tjest telex for 240229 of 24.02.84 and 070502 of 7.05.84) :
Crude oil sample, OMC 3250, 3300-3335 m, PT-1.
Crude oil sample, OMC 3295, 3263-3287 m, PT-2.
Sidewall sample, Kimmeridge clay formation, 4112.5 m
Sidewall sample, Kimmeridge clay formation, 4113-5 m
Since the sidewall samples were only of limited size not all
tvoing parameters could be determined.
2. RESULTS AND DISCUSSION
The results, which are given in Tables 1-3 and Pigs. 1-10
Ir.iicate the following :
7rude oil samoles
The gas chromatograms of the saturated hydrocarbons (?ig.l-2)
and the C7 alkane distributions (Pig.5) indicate that both crude
•3'-. samples have not been bacterially degraded.
The relatively low intensity of the non-n-alkanes in the C30
region of the gas chromatograms (Pig.1-2) and the C29 DOM values
o:
70 (VR/E =1.0) point to expulsion from (a) mature source
•~3ck(s). It should be kept in mind that the C29 DOM has only been
calibrated between 56-66 (VR/E= 0.5-0.85) and that values above
^r.1 below this range has been obtained by extrapolation.
The shape of the gas chromatogram (Pig.1-2) and the C15- and
-'A redistribution (Pig. 6) indicate that both oils were
crated from a source rock containing structureless organic
er (S.O.M.). The sterane and triterpane fragmentograns (Pigs.
•-•') indicate that the S.O.M. is probably of bacterially reworked
—ytoolanktonic origin.
RKER.84.162
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Confidential
C7 alkane/naphthene distribution (Fig-5) points to a
•..-vy environment of deposition of the source matter of these
. ,..:-ie oils.
4] 1 data indicate that both crude oils have been expelled
.-.,-,-; the same or a similar type of source rock.
"xtracts of Kimmeridge_clay formation
•-Ifc
All data indicate that the extracts of both samples (4112.5
and 4113-5 ni) are very similar.
The relatively low intensity of the non-n-alkanes in the C30
region of the gas chromatogram (Pigs. 3-4) and the C29 DOM values
of 68 (VR/E= 0.9) indicate that these extracts are mature. This
Is in agreement with the estimated DOM values of 65-68 (VR/E=
0.8-0.9) obtained by a fluorescence measurement of liptinites.
(Table 3 ) .
The shape of the gas chromatograms (Figs. 3 - 4 ) , the C15- and
C30 ringdistributions (Fig.6) and the sterane and triterpane
fragmentograms (Figs. 9-10) indicate that these samples contain
structureless organic matter of probably bacterially reworked
chytoplanktonic origin.
Correlation
All data indicate that both crude oils and the two extracts
are rather similar.
!
'M-
3- CONCLUSIONS
Both crude oil samples (Well 2/5-7, 3300-3335 m and 32633287m) have been expelled from the same or similar type of source
rock. They have not been bacterially degraded and were expelled
-"on a mature (shaly) source rock containing structureless
°"ganic matter of bacterially reworked phytoplanktonic origin.
Both rock samples (4112.5 and 4113.5 m ) , are rather similar
-^3 can be regarded as mature source rocks.
--S 7 contain structureless organic matter probably of bacterially
phytoplanktonic origin.
RKER.84.l62
- 3 -
Confidential
The Kimmeridge Clay Formation as represented by the two
samples investigated may well be the source of the crudes found
in this well.
RKER.84.162
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Confidential
Table-1 GEOCHEMICAL DATA OF CRUDE OILS, WELL 2/5-7
t
I
s
i
API
specific gravity
jjw. boil. 120°C
% sulphur
3300-3335 M
PT-1, OMC 3250
41.8
0.8162
15-5
0.1
ppm V as metals
ppm Ni as metals
0
0
0.2
0.7
Pristane/phytane
Pristane/nC17
Phytane/nClS
1.,4
0.• 5
0.5
1.4
0.6
0.5
C7-distribution
C7-alkane
nC7
monobranched
polybranched
3263-3287 M
PT-2, OMC 3295
40.7
0.8219
12.6
0.1
53
37
54
36
10
10
C7-alk/naphthene
nC7
naphthenes
branched alkanes
28
46
26
29
46
25
C7-alk/naphth/arora
nC7
naphthenes
aromatics
48
41
11
48
41
11
C15-distribution
1-ring
2-ring
3-ring
56
32
12
61
24
15
C30-distribution
3-ring
4-ring
5-ring
33
42
25
29
46
25
C29 DOM
70
70
" asphaltenes
•4 saturates
;> aromatics
1, ^ e1; erocompounds
'= "est
0/
*
00
-
0
45s
9
s
3
43
-28.1
Determined by column chromatography
Determined by TLCPID
RKER.84.162
67*
28
5
-28.2
Confidential
- 5 -
TalDle-2
GEOCHEHICAL DATA 0? EXTRACTS
Kimrne r i cge Clay FI-I
Well 2/5 - 7
Sidewall samples
4112.5 n
"4113.5 m
ethyl acetate extract
2.0
7.0
organic carbon after extraction 7-0
ND
sulphur
i '
2.6
6.6
ND
ppm V as metals
ppm Ni as metals
ND
ND
ND
ND
Pristane/phytane
Pristane/nc17
Phytane/nC18
C15 distribution
1-ring
2-ring
3-ring
1.5
0.6
0.5
1.5
0.6
0.5
54
32
14
55
30
15
C30 distribution
3-ring
4-ring
5-ring
24
51
25
32
40
23
C29 DOM
68
68
fo saturates
70 aromatics
$> heterocompounds
39
46
15
43
40
17
6 13n o/ O Q (extract)
6 15
C O//oo
( )
ND
-23.7
extract/carbon
0.28
-29-8
-29-3
0.39
ND = Not d e t e c t a b l e due t o the small amount of m a t e r i a l
»
,-S
RKER.84.162
i
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MRCERRL D E S C R I P T I O f - .
R H M NELL 2 /5
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4112.5 M t S.O.M. PARTLY MICRIHISED
FOSSIL REMAINS
DARK FLUORESCENT LIPTINITES (MATURE)
DOM ABOUT 65-68 ?
1*335
TRBLE '. 3
CflS CHROMflTCGRflM OF SATURATED HTDRCCflRBQNS
FIG. 1, NCRWflT. 2/5-7. 3300-3335M, OHC
32 C J0.
PT-1
GAS CHROMATOGRAM OF SATURATED HYDROCARBONS
FIG.2. NORWAY 2 /S-7 3263-3287 FT OMC 3295
1»
CAS CHROUATOGRAy OF SATURATED HYDROCARBONS
FIG. 3
Jll
NORWAY 2 / 5 - 7
4 1 1 2 . 5W KIMU.CLAY. SWS
w
CAS CHROMATOGRAU OF SATURATED HYDROCARBONS
FIC. k
f
NORWAY 2 / 5 - 7
4 1 1 3 . 5M KIMM.CLAY. SWS
i,
M iliJt
i l 1 :> I l i I U t i
BRANCHED
1. /
I I O/M
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LEGEND
32bO.
O- 2/t>-7.3?63-3207»'i.n-?. PUC 3?9'J. NPHWR1
LP
v
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L R N D P L R N T - D F R I V E D C R U D F S H I T H SUBSTRNTIflL R E S I N C O N T R I B U T
C R U D F 5 OF M I X E D O R I G I N
C R U D F S D F R I V E D FROM SOM R N D / O R HLGRL M R 1 T E R
LEGEND
t'i • O* + -
2/5-7.
2/S-7.
2/5-7.
?/5-7.
3300-333f)M, CMC 32 1 J0. NPHHRI
3263-3237M.n-P.0fiC 329b. NCHKflf
4112. bH.GMS.KINIfcT.lfjGf [Lfil.NPnHflT
4113. OK. fjHS. KIHMERJDCE t l fit, NCHHfiT
\
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y
o
TO S O U R C E M R 1 T E R
4R
•
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Jfig. 0-1
1S4S4
o
o1
triterpane fragmentogram (scans 1300 to 2^83)
2:
o
w
c
a
w
>
U-*.
>
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ii
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sterane fragmentogram(Scans
O
1100 to 1750)
f?"
1
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AW
iqfi
11
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r ft
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VI - . 5
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215- 21:
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50176
tritorpanc fraementograra (scans H O O to 2583)
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iiJiJL
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T3r V
11 .'. f..*
-il
*.'!
f>'
34S24
sterane fragmentogram (scans 1250 toi850 )
A
2<pr
217- 21"
218- 21:
253- 25:
i/9T
/
f^
n
1
.wi/.
l i U ^ l i Hl»- />U-
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wø.ø
45856
tritorpano f raiment ogram (scans 1*100 to 2583)
O
1
:<
-
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> •
2
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r
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1S1 .
1S1.0D
± 0.501
H
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w
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f
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ro
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32352
108.6-
Ul
sterane fragmentogram (scans 1250 to 18^O)
H
'S
o
K
O
r
217- 2T
2iS- 21:
25S- 25:
TOTAL.
l&
%
*
•
JU
_ 7_
Confidential
JNITTAL DISTRIBUTION
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Shell Forus EP
3 copies
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RKEH.84.162
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