New Mexico Bureau Mines and Mineral Resources Open File Report No. 273

HYDROCARBON SOURCE-ROCK ANALYSES. AMOCO PRODUCTION COMPANY NO. 1 BAKER' WELL,

QUAY COUNTY, NEW MEXICO

By GeoChem Laboratories, Inc. and Chevron U.S.A., Inc.

1987

QEOCH,'?MlCAL ANALYSES CRUDE OIL CHARACTER'ZATION CRUDE OIL-SOURCE ROCK CORRELATION

SOURCE ROCK EVALUATION QEOCHEMICAL PI1OSPEPTINQ

DTWHeM lABORATORle.9. INC. 14007-H EAST FASTER AVENUE ENGLEW00Q.CQLQRhDQ EO111 PHONE (303) 8*3-0220

. 20 January 1984

Mr. Steve Jacobson CHEVRON. USA, INC. 700 S. Colorado Blvd., Box 599 Denver, CO 80201

Dear MF. Jacobson:

P lease f ind enc losed the resu l t s o f the geochemica l sc reening ana lys i s on t h e f o u r ( A ) samples a s you reques ted .

Your re ference numbers and well name f o r t h e s e s a m p l e s a r e l i s t e d belo-q w i t h the corresponding GeoChem Job and sample numbers.

GeoChem Job No. D1123-001 P4420-5 6400'-6500' Amoco P r o d u c t i o n B a k e r s -002 -6 7100'-7200' zk9k3QL. " ... I

-003 -7 7700'-7800' .Q???. C.O,.,,.&

-004 -a 8050'-8100'

If YOU should have any ques t ions concern ing th i s ana lys i s , p lease do n43t h e s i t a t e t o c a l l u s .

S ince re ly ,

Technical Manager

RWP : pkn Enclosure

..

Amoco Production Baker 111

GEOCHEn SAMPLE NUMBER

29-9N-30E Quay Co., NM

RESULTS OF TOTAL ORGANIC CARBON

CLIENT IDENTIFICATION

NUMBER

TOTAL ORGANIC CARBON

(% of Rock)

D1123-001 Depth 6400' -6500' 0 .84 A bo

D1123-002 Depth 7100' -7200' 1.21 [ b y -

D1123-003 Depth 7700'-7800' 1 - 6 7 54,--4

D1123-004 Depth 8050'-8100' 6.5616.59 %dh

Amucu Production Bsksr 8 1 29-9N-30E Quay Co.. NU

T.O.C. SI - Free hydrocarbons. mg HCIg of rc 52 - Residual hydrocarbon potential

53 - CO2 produced from kerogen pyrol )

- Total o r g a n i c carbon, v t . X

(mg HC/g of rock)

(mg C021g of rock) Hydrogen

Oxygen Index - mg HClg organ ic carbon

PI Index - mg CO2/g organic carbon - S l l S l + 52 Tmax - Temperature Index, degrees C.

RESULTS OF ROCK-EVAL PYROLYSIS

D1123-001 Depth 6400'-6500' 332 0.26 0.65 0.56 0.29 1.17 0.84 77.5 66. p,

Dl 123-002 Depth 7100'-7200' *: 0.20 0.80 0.40 0.20 1.97 1.21 66.0 33.

01123-003 Depth 7700'-7800' 1 445 0.26 1 . 6 3 0.42 0.14 3.90 1.67 97.5 25.1

D l 123-004 Detph 8050'-8100' 0:74 8.78 0 .33 0.08 26.22 6.58 133.4 5. i 442

J H N I S T I ME=

FID AT I V = 23

TCD HT

9 1984 1442 001 TENUATION= 4 TENUATIUN= 32

GEOCOM ROCK E V A L I 1

! 1 1 I

50% 350

I 1

96% 550

I ! !

T O C = 6.84 U T = 99.4 TIIHX = 332 DEGREES C

52= t6.511.E-81 SUM= +4.704E+03 t2.532E-01 SUM= +1.902E+03

c 7 - t5.555E-01 SUM= +7.391E+03 UNKNOLIN

JAN 13, 1334 TIME= 1511

F ID FITTENUATION= S T C D ATTENUATION= 3 2

GEOCOM ROCK EVAL I 1

ID= 23602

I I

902 550

! !

TOC = 1.21 WT = 1 9 . 4 T t k = i i 0 DEGREES C 51= t2.814E-61 SUM= +1.455E+03 52= +7.991E-01 SUM= +5.773E+03 53= t4.64'3E-01 SUM= +5.683E+63 u r.4 K N 0 w N

"

1 _"""""""""""""""""""""""""""""""""""""""-

!AN 189 1984 GEOCOM RUCK EVFIL 1.1

r Ir lE= 1540 I D = 23063 FID HTTENUATION= 16 rCD ATTENUATION= 32

oi: 1 e0

! 50% 350

! ! I I ! I I

9 0 i; 550

! I

IFID HTTENUATION= 128 T C U ATTENUHTION= 32

CiEUCOll ROCK EVAL I 1

If /. 108

- .. - 56% I I

356 I ! I I I !

96% 558

! I

TIllE= 0721 ' H N 19, 1934

GEbCOH ROCK EVHL I 1

GEPTH S I 52 53 TPlRX P I 52/52 T U U H I "_ ""_ """ ""_ "" ""_ ""_ iri -"" ""_ ""_ 081 80.26 900.65 01 c t w 00.28 ~ 8 . 8 ~ 0 1 063 80.26 081.63 01 QO4 80.74 008.73 01

3 . 3 . 3 . a .

L E G E t d D - = N E C H T I V E D H T A * = S I G N A L > A/G L I M I T + = O R T A > COLUPlN L I P I I T i t = I N V R L I ' O D H T R i R E S U L T S """"""""""""~

.56 332 0.29 01.: , e 0 440 e.28 91.1 .42 4 4 5 0.14 8 3 . : - 3 3 442 0.08 26.:

""_ """""""""

a . 1. I. 6 .

"_"""""""__

. .

BIOSTRATIGRAPHIC STUDY 01303 ( A D D C I J D U ~ )

LOCATION: Amoco Ra-)

PROBLEM: MOA, TAI and RoV analyses of four Pennsylvanian age well cuttinp samples for J. T. Jonas.

RESULTS: Organic MOA Kerogen Type % Yield Submitted

Sample No. Depth 1 IT 111 IV m1/10 grm RoV Pge/J.T. Jonas

P4420-1 6300 - 400' 0 20 40 40 Trace 2.7 No plug. Wolfcamp?- Penn.

2 6600 - 700' 0 15 45 40 Trace 2.7 No plug. 3 7500 - 600' 0 20 50 30 Trace 2.8-2.9 No plug. 4 7800 - 900' 0 20 40 40 Trace 2.7 No plug.

I ,

I t

,I

DISCUSSION:

MOA analysis of these samples by S . C. Teerman - COFRC (re memo to S . R. Jacobson, 3 / 2 5 / 8 5 ) and J. D. Saxton indicate the organic matter in these semples to be dominantly Type I11 vitrinitic "gas prone" kerogen. This determination is somewhat corroborated by pyrolysis results of four other samples within the samk over-all well interval, in which HI values range from 66.0 to 133.4 indicating gas proneness (i.e., 0-150).

This degree of corroboration became necessary because of the presence of a great deal of amorphous Type 111 ammp+me material which resembles Type I1 "oil prone" kerogen.

Md~W M. w. THOMPSON/J. J. t D. SAXTON

s . c. TEERMAN (COFRC) MWT:Uml

MR. S. R. JACOBSON Chevron-Central

Dear Steve: '

~. . ... - - .

MEMORANDUM

Box 446 La Habra, CA 90631 March 25, 1985

MOA ANALYSIS AMOCO BAKER #I.. NM AND IDENTIFICATION OF AMORPHOUS VITRINITE d4 -qd - 30&

Much of the amorphous fraction in the four &co baker #l samples (P-4420) consists of vitrinitic organic matter (OM). However, some oil-prone amorphous OM and degraded cutinite also occur in these samples (approximately 5-20%). This observation is based on microscopic analysis of sieved transmitted light slides only. Geochemica1,data are necessary to confirm the microscopic classification of amorphous organic matter. /#4NFr b*-L4mJ 3500- 7LOD

Identification of Amorphous Vitrinite

The following are some general comments and nricroscopic properties that can be used to help identify amorphous vitrinite:

1: Descending gradation of identifiable vitrinitic particles

will display a transition between amorphous and structured OM to amorphous-like OM. Often, amorphous vitrinitic material

amorphous edges or "coatings" are often a good clue that tke (Plates 1 and 2 ) . Vitrinitic particles that display

amorphous OM may be humic in origin. Remnants of vegetal or woody structure (incompletely altered hum3.c remains) in amorphous-looking particles also suggest a humic origin o f the OM (Plate 2 ) .

2. Appearance in reflected light. Amorphous vitrinite with a maturity less than about 0.8% vitrinite reflectance wi1L generally have higher "visual reflectivity" than oil-prone amorphous OM. However, .with increasing maturity, the hydrogen content of oil-prone amorphous OM. decreases; therefore, their reflectivity or ''gray level" increases an'l they develop a more consolidated texture resulting in an appearance similar to vitrinitic OM. Vitrinitic remnants in. amorphous clumps or particles are easier to recognize in reflected light. As shown in Plates 1 and 2. using a transmitted li ht slide and alternating between transmittejl

vitrinite remnants.

' bboo- L h + f 7800- 7909

and reflected f ight can be very useful to help recognize

2

humic amorphous OM will be a darker color (reddish brown or 3 . Color of amorphous OM in transmitted light. In general, dark brown) compared to oil-prone OM. This color difference is especially evident at the edges of amorphous particles. However, this is a subjective and maturation dependent property. The color of amorphous OM is somewhat dependent upon the Eh potential of the depositional enviroment, (Masran and Pockock, 1981). With increasing maturity, the color differences between differtint types of amorphous kerogens become less distinctive.

4. Fluorescence of amorphous OM. Although the fluorescence of oil-prone kerogens is often extremely weak, it can sometimes be used to help distinguish oi.1-prone and vitrinitic (non-fluorescent) amorphous OM. Immature oil-prone amorphous kerogens have a positive fading effect

which,can be u.sed to help identify the oil-prone amorphous (increase in fluorescent intensity with time of excitation), kerogen. However, fluorescence is subjective and also maturation dependent ‘and can not be used alone t o distinguish different types of amorphous kerogens.

display a more crystalline or ‘!grainy” texture in contrast to 5. Texture. Oil-prone amorphous kerogen wi’ll sometimes

amorphous vitrinite.

vitrinite include: (a) evidence of fungal breakdown such as 6. Other characteristics useful in detecting amorphous

woody remains permeated with fungal hyphae, (b) partial degradation, pitting, or patterned thinning of exinitic material, and (c) diagnostic microfossils, whFch provide information on the depositional environment.

As stated above, most of these microscopic properties that can be used to identify amorphous vitrinite are subjective and often difficult to detect. No single microscopic property will provide a conclusive answer. The problem is compounded with mature and post-mature samples. However, by piecing together as much information as possible by using the above criteria a decision can often be made on the type of amorphous OM. This decision needs to be confirmed with

more complete description (with photomicrographs) of the geochemical analyses. I hope in the near future to write a

microscopic properties and identification of amorphous humic material.

S. C . TEERMAN COFRC

SCT: ez

Attach: Plates 1-2 cc wlattach:

L. C . Bonham R. W. Jones

File-4th

REFERENCES

Masran, T. C. and Pockock, S., 1981. The classification of plant-derived ,particulate organic matter in sedimentary rocks. In: Brooks, J. (ed.). Organic maturation studies and fossil fuel exploration, pp. 145-175. Academic Press, New York.

PLATE 1

Figure 1.

Figure 2.

PLATE 2

Figure 1.

Figure 2 .

Amorphous vitrinitic particles in transmitted light (arrows). Note gradation of identifiable vitrinitic particles to amorphous-like organic matter. 750X

Amorphous vitrinitic particle in reflected ligt-t. Using transmitted light. Note the more vitrinitic appearance of particles in reflected light. Same field of view as Figure 1. 750X

Amorphous'vitrinitic particle in transmitted light. Note reddish-brown color of particle (arrow), which is transition between vitrinite and amorphous. 750X

Amorphous vitrinitic particle in reflected light. Note vitrinite relic in particle (arrow). Same field of view as Figure 1. 750X

- Total organic carbon. Y:. - Residual hydrocarbon potentlal - Free hydrocarbons, mg IIC/g \ ' D

- COZ produced from kerogen pyrolysis

*.

(mg HClg of rock)

(me CO2/g of rock)

- mg RClg organic carbon - SllSl + 52 - mg COZ/g organic carbon

- Temperature Index, degrees C.

nco Production Baker 81 -9N-30E ay Co.. NH

RESULTS OF ROCK-EVAL PYROLYSIS

T.O.C. SI s2

s 3

Hydrogen

Oxygen Index

lndex

Tmax PI

123-001 Depth 6400'-6500' 332 , 0.26 0.65 ?%;. lrdY/0.56 0 .29

123-002 Depth 7100'-7200' 440 . 0.20 0.807h&.40 0.20

123-003 Depth 770O'-780Ot' 445 0.26 1.63 ?& 0.42 0.14

123-004 Detph 8050'-8100' 442 0 .74 8.78 0 . 3 3 0.08

7 3

1.17 0.84 77.5 . 7

1.97 1.21 66 .0 33 .5

3 . 9 0 1 . 6 7 97 .5 25.0

2 6 . 2 2 ) r d 6 .58 133.4 5.1

66 .1 7 I;

. I . . ,

23

I) TABLE 1

GEOCHEMICAL PARAMETERS DESCRIBING SOURCE ROCK GENERATIVE POTENTIAL AND LEVEL OF THEREIAL MATURATION

Quantity TOC (wt. % ) S2 (mp, HC/g rock)

Poor ' 0-0.5 . Fai r 0.5-1

' G o o d 1-2 Very G o o d >2

0-3 3 -5 5-10 > l o

Quality HI:'t (mg H C I g Cor ) S 2 l S 3

Gas Gas and oil Oil

- 0-150

150-300, 0-3 3 -5 >5 >300

-1 PI ... Maturation [ S l l (Sl+S2) I T max ( " C ) Ro ( % )

Oil "birthline" -0.1 -435 Oil "deadline" ' 0 . 4 - 4 6 0

-0 .6

-1.2

tura . . . . . .~.. .- . ." .... .-

*Hydrogen Index, assuming a level of thermal ma organic matter equivalent to R = 0 . 6 x .

0

tion for the

AMDCB BAKER HI NEW MEXICO P442B

F ICURE ,1

FIGURE 2 AMUCO HAKE3 # 1 NEW MEX I.CO F'4420

75L IC