New
Mexico Bureauof Mines and Mineral
Open File ReportNo. OF-272
Resources
HYDROCARBON S.OURCE-ROCK ANAYLYSES,
TRUE OIL COMPANYNO. 21 MEDINA WELL,
COLFAX COUNTY, NEW MEXICO
By Core Laboratories, Inc.
and Cehvron U.S.A., Inc.
1987
1601 S T E M M O M FREEWAY.80X 47541.DALLAS.TEXAS 1 5 2 4 1 ~ 1 1 4 ~ 8 3 1 8 2 1 0
CORE LABORATORIES, INC.
May 17,1983
Geochemical
Services
M r . S. R.Jacobson
C h e v r o nU S A
C e n t r a lR e g i o n
P. 0. B o x 599
D e n v e r , CO 80201
Subject:TotalOrganicCarbonand
Rock-Eva1Pyrolysi::
Well: T r u eO iCl o m p a n y
No. 27 Medina
Chevron
Job
Nos.:
P-4079-1
CMEN-1120
O u rJ o b
No.:
83075
DearMr.Jacobson:
'3
. T h ef o l l o w i n gr e p o r ct o n t a i n st h ea n a l y t i c arl e s u l t so f
30 sampl?s in t h e
i n t e r v a l 3620 t o 9000 f e ef tr o m
t hT
e r uO
eC
il ompany
No. 21 Medina,
N . M . A lol r g a n i cc a r b o na n dR o c k - E v a 1P y r o l y s i sd a t ai s
C o l f a xC o u n t y ,
p r e s e n t e d in T a b l e 2.
T h eo r i g i n a lp y r o l y s i sp y r o g r a m sh a v eb e e nr e t u r n e da sr e q u e s t e c ' .
T h a n ky o uf o rt h eo p p o r t u n i t yt ob eo fs e r v i c et oC h e v r o nU S A .
h a v ea n yq u e s t i o n so r
if wemaybeoffurtherassistance,pleasedonot
hesitatetocallus.
Sincerely,
CORELABORATORIES,
R o b e r tB l a k e
Supervisor
GeochemicalServices
RB,PJS:kn
INC.
Paul J. Swetland
Manager
GeochemicalServices
If y o u
*
F I L E NO. 8 3 0 7 5
True O
li Company
No. 21Medina
ROCK-€VAL PYROLYS
Depth
(FT)
3620- 3880
4120- 4130
4290- 4310
4870- 4920
5130- 5170
5200- 5210
5.4 0 0 - 5 4 3 0
5 5 6 0 5- 6 4 0
5 8 2 0 -5 8 5 0
6 1 3 0 -6 2 7 0
6350- 6400
6480- 6500
6600- 6650
6800- 6850
7020- 7100
7130- 7200
7230- 7260
7420- 7490
7650- 7680
7840- 7860
7950- 7980
8 0 1 0 -8 0 8 0
8 1 6 0 -8 1 8 0
8 2 3 0 -8 2 5 0
8 3 1 0 -8 3 5 0
8 4 1 0 -8 4 5 0
qgnn8 7 7 0 -8 8 0 0
8880- 8940
8 9 6 0 - 9000
~~
~~
TOC
(wt%)
0.53
0.57
0.98
1.01
0.72
0.75
0.83
1.07
1.61
1.76
1.13
0.77
0.89
0.87
0.84
0.97
1.oo
0.92
1.07
1.62
9.55
2.01
3.41
1.44
4.89
5.62
4.71
2.12
1. 8 8
2.59
s1
0.06
0.02
0.15
0.16
0.08
0.05
0.04
0.04
0.32
0.13
0.09
0.05
0.08
0.03
0.04
0.04
0.03
0.03
0.06
0.04
0.43
0.04
0.06
0.01
0.08
0.08
0.07
0.04
0.03
0.03
Organic
Carbon
TOC = Total
HydrogenIndex
OxygenIndex
= 'l/TOC
= '3/TOC
Mg/Gm R o c k
53
52
0.73
0.41
0.06
0.09
0.08
0.20
0.68
0.24
0.07
-
-
0.09
6.51
0.16
0.52
-
1.20
1.09
1.19
-
0.47
0.56
0.53
0.35
0.35
0.40
0.46
0.47
0.32
0.29
0.26
0.30
0.29
0.27
0.35
0.35
0.42
0.36
0.42
0.27
0.56
0.51
0.44
0.46
0.41
0.38
0.33
0.34
0.31
0.34
Hydrogen
Index
-
74.5
40.6
8.3
12.0
9.6
18.7
42.2
13.6
6.2
-
5.6
68.2
8.0
15.2
-
24.5
19.4
?5.3
-
Oxygen
Index
88.7
98.2
54.1
34.7
48.6
53.3
55.4
43.9
19.9
16.5
23.0
39.0
32.6
3 1 .O
41.7
36.1
42.0
39.1
39.3
16.7
5.9
25.4
12.9
31.9
8.4
6.8
7.0
16.0
16.5
13.1
O i l o r Gas
Potential
Shows
0.06
0.02
0.88
0.57
0.14
0.14
0.12
0.24
1.00
0.37
0.16
0.05
0.08
0.03
0.04
0.04
0.03
0.03
0.06
0.13
6.94
0.20
0.58
0.01
1.28
1.17
1.26
.O. 0 4
0.03
0.03
0.06
0.02
0.15
0.16
0.08
0.05
0.04
0.04
0.32
0.13
0.09
0.05
0.08
0.03
0.04
0.04
0.03
0.03
0.06
0.04
0.43
0.04
0.06
0.01
0.08
0.08
0.07
0.04
0.03
0.03
O
li o r Gas Shows = S1
O
li o r Gas P o t e n t i a l = S1 + S2
S.
Trans Ratio
=
1
-
s1+s2
Trans
Ratio
-
-
0.17
0.28
0.57
0.36
0.33
0.17
0.32
0.35
0.56
-
-
TMAX
(Deg C;
;
'
"
442
449
449
455
444
432
452
449
4 54
-
-
-
-
0.31
0.06
0.20
0.10
482
4 88
510
481
0.06
0.07
0.06
492
490
499
-
-
-
-
-
T R U E OIL CO. a 2 1 M E D I N A
SEC.
25
-
COLFAX CO.,
24N - 16E
NEW MEXICO
HYDROCARBON GENERATION ZONES
BlOSlUDK
NO.
1116
%
KEROGEN TYPES
T
I
!
1
,
!
BIOSTRATIGRAPHIC STUDYNO. 1176
PALYNOLOGY REPORT
Location
True OilCo. 821 Medina
Sec. 25-24N-16E
Colfax County, New Mexico
Problem
Cuttings samples submitted by Steve Phillips for determination of maturity (TAI-V~)and microscopic organic analysis
(MOA) indices.
Note:
'3
For discussioninthisreporr,thesamplesare
grouped mainly by
Tmax values, the interval 36206400 has Tmax values in the oil generating range,
the interval 6480-7770 had insufficient
52 values
duringpyrolysistomeasure
Tmax andth?third
interva1"from- 7840-8800 has Tmax values in the gascond. generative range.
Specimens of Lycospora sp. were used or co-rsidered
in making TAI determinations. The restricted range
of this palynomorph is Devonian, Miss. and Penn.,
thus corroborating to gome extent the stratigraphy
as given. They were first noted in sample 8, (55605640) and were generally evident TD.
to
Sample 33 (8310-8320) was very good
for determination of vitrinite reflectance.
The vitrinite plug
for sample 28 (8770-8800) seemed noticeably cleanof
caving material. Also the TAI slide for this sample
hadasmall
TAI spreadindicatingahomogeneoua
sample.
The TAI slideforsample
30 (8960-9000)
contained two groups
of TAI indices, the
3.8-3.9
(drygas)groupwasinterpretedasreworkm?d,the
less mature group 3.6-3.7 waa interpreted as probably being in place and corroborated by
v!.trinite
reflectance.
'3
-1-
Results
Data
Sample
P4079-1
(3620-3880)
2
3
(4610-4670)
31
P4079-4
5
6
7
8
9
10
11
(4120-4130)
(4290-4310)
(4870-4920)
(5130-5170)
(5200-5210)
(5400-5430)
(5560-5640)
(5820-5850)
(6130-6270)
(6350-6400)
Kerogen
Types
(MOA)
TOC
1 111 11
10 30 60
0
0
10
60
0
20
50
0
40
30
0
0
050
0
0
0
0
0
20
20
10
10
10
10
30
30
30
50
50
30
30
30
50
60
60
60
60
30
30
30
30
30
20
20
IV
-
Organic Yield
(m1./10 grams.)
.53
.57
.98
1.01
.72
;75
.83
1.07
1.61
1.76
1.13
.6
.5
1.0
.6
.6
.5
1 .o
.5
1.0
.5
.6
.8
Maturity
‘3
Tmax
sample
3,442OC
oil
generative
zone.
samples 4-7, 9-11, 444O-455OC oil gen. zone.
sample 8, 432OC immature. Note: Tmax value is not substantiated by TAI and therefore should
not be used.
-
VO
sample 31, .83 (=TAI 2.8-2.9) oil gen. zone.
sample 4, 1.2 (=TAI 3.2) early gas-cond. gen. zone.
Note: sample 4 has a higher Vo reading
than might be expected from adjacent
interval, could be measuring reworked
vitrinite.
sample 11, 1.31 (-TAI 3.3-3.4) gas-cond. gen. zone.
TAIsample
1, 2.9
(=V,
.go) oil
gen.
zone.
oil gen. zone.
.90-1.1)
2.9-3.1
(=Vo
sample 31,
oil
2.9-3.0
.90-1.0)
gen. zone.
(=Vo
sample 8,
Amount (of oraanics)
W t 5: TOC
samples 1-3, .53-.98 fair (.5-1.0).
samples 5-7, .72-.83 fair (.5-1.0).
samples 4, 8-11, 1.01-1.76 good (1.0-2.0)
Organic yield, see above.
-2-
~
J
,/
,>
Sample
P4079-12
13
14
15
16
17
34
18
19
32
1
(6480-6500)
(6600-6650)
(6800-6850)
(7020-7100)
(7130-7200)
(7230-7260)
(7240-7250)
(7420-7490)
(7650-7680)
(7740-7770)
0
0
0
0
0
0
0
0
0
0
Kerogen Types (MOA)
11 IV 111
20
30
50
60
30
10
60
30
10
10
60
30
10
60
30
10
60
30
50
30
20
60
30
10
10
60
30
60
30
10
TOC
.77
.89
.a7
..97
a4
1.oo
.92
1.97
Organic Yield
(m1./10 grams.)
1.0
.6
1.0
.8
.5
.5
1 .o
1.0
1.0
1.6
Maturity
insufficient
Tmax
S-2
"3
-
VO
sample 16, 1.41 (=TAI
3.4-3.5)
gas-cond.
gen.
zone.
sample 19, 1.56 (=TAI 3.5-3.6) gas-cond. gen. zone.
sample 32, 1.41 (=TAI 3.4-3.5) gas-cond. gen. zone.
TAI
sample 13, 3.3-3.5 (=V0 1.3-1.5) gas-cond.
gen.
zone.
sample 18, 3.5-3.6 (=Vo 1.5-1.7) gas-cond. gen. zone.
sample 19, 3.3-3.6 (=Vo 1.3-1.7) gas-cond. gen. zone.
Amount (of organics)
wtX TOC
samples12-16, 18, .77-.97fair(.5-1.0).
samples 17, 19, 1.0-1.7 good (1.0-2.0).
Organic yield, see above.
'3
-3-
;/
$9
Sample
P4079-20
21
22
23
24
25
33
26
35
27
28
29
30
Maturity
Tmax
j:
"0
TAI
TOC
-
Kerogen Types (MOA)
1
11 IV 111
(7840-7860)
0
10
60
30
(7950-7980)
0
10
60
30
(8010-8080)
10
60
0
30
(8160-8180) 30 0 50 20
(8230-8250)
050 20
30
(8310-8350)
0
30
40
30
(8310-8320)
(8410-8450) 30 0 50 20
(8430-8450)
0
30
50
30
(8500-8560)
0
20
50
30
(8770-8800)
0
20
50
30
(8880-8940)
20
30
050
(8960-9000)
20 30 50
0
Organic Yield
(m1./10 grams.)
1.62
9.55
2.01
3.41
1.44
4.89
5.62
4.71
2.12
1.88
2.59
.1
2.2
1.6
2.0
2.0
2.0
1.2
1.5
1.5
.2
.07
.3
.2
$gOL
samples 20, 21, 23, 25, 26 and 27, 4810
O C Cas cond.
gen. zone. sample 22, 510OC. Post mature. Note: This
value is out of context with adjacent
hasalso
sample
values.
This
highera
maturity index (TAI 3.7-3.8=V0 2.0-2.7)
which is actually not inconsistant with
the Tmax of 510oC but the thermal
gradient as indicated by adjacent
samples doesn't accommodate these
maturity values. The most likely
reason for higher indices in this
sample is thata perhaps larger amount
of redeposited material waspremnt in
this interval.
sample
sample
sample
sample
sample
33, 1.39
35, 1.61
28, 1.53
29,1.67
30, 1.75
3.3-3.4) gas-cond. gen.
3.5-3.x) gas-cond. gen.
3.5-3.6) gas-cond. gen.
3.5-3.6) gas-cond. gen.
(=TAI 3.6-3.7) gas-cond. gen.
(=TAI
(PTAI
(=TAI
(=TAI
zone.
zone.
zone.
zone.
zone.
1.5-2.0)
gas-cond.
gen.
zone.
sample 28, 3.5-3.6 (4,
sample 30, 3.6-3.7 (=Vo 1.7-2.0)
gas-cond. gen. zone.
Amount (of organics)
samples 20, 24, and 29, 1.44-1.88 good (1.0-2.0).
samples 21, 22, 23, 25, 26, 27, 28,
and 30, 2.01-9.55 very
good (2.0-10.0).
Organic yield, see above.
J. D. SAXTON
6/9/83
JDS:mm
Attachments: Computer drafted chart
Fig. 1
Core Lab Report 83075
-4-
rrsL
e
.
-
,
.,.
.,a.
..