New Mexico Bureau of Mines and Mineral Resources
Open File Report No. OF 194
HYDROCARBON SOURCE-ROCK EVALUATION STUDY,
SUNRAY MID-CONTINENT NO. 1 FEDERAL R WELL,
LUNA COUNTY, NEW MEXICO
by L. Paul Tybor
GeoChem Laboratories, Inc.
Houston, Texas
March 5, 1982
GEOCHEMlCAL ANALYSES
SOURCE ROCK EVALUATION
olL"souRcE ROCK CORRELATION
1143-C BRllTMOORE ROAD
CRUDE OIL CHARACTERIZATION
GEOCHEMICAL PROSPECTING
HOUSTON, TEXAS 77043-5094
713/467-7011
March 5, 1982
?&:
Mr. Clayton S. Valder
Lordsburg Exploration Group
Marshall R. Young OilCo.
750 West Fifth St.
Ft. Worth, Texas 76102
Dear
Mr.
Valder:
of the organiiAeochemica1 analyses performed
Enclosed please find the results
on well cuttings samples from the Sunray
No. leico-Federal R. Well 1Ebated
in Sec. 27-285-5W Luna County,
New Mexico.
Upon arrival at GeoChem the samples were assigned the GeoChem Job Number
2243, and were submitted to the following analytical program:
Table
Analysis Type of
.............. I
analysis
............................. I1
Total organic carbon determination
& brief lithological description.
Pyrolysis
Visual
kerogenassessment......................III
Vitrinite reflectance..........................IV
The averaged mean geochemical data values, along with the hydrocarbon source
rock characteristic interpretations for each stratigraphic unit analyzed from
the wellis presented in Summary Table 1.
Mr. ClaytonValder
-2-
March 5 , 1982
DISCUSSION OF TRE RESULTS
A.
Thermal Maturity of
Sediments
The thermal maturity of the sediments analyzed
from t h i s w e l l r a n g e s
from a mature Maturation Index Stage
2+ t o 3- a t 2710k f e e t , w i t h i n a n
u n d i f f e r e n t i a t e d s e c t i o n , t o a s e v e r e l y altered MaturationIndexStage
3+ t o 4- a t 6520+ f e e t , w i t h i n t h e Cambrian Bliss dolomite. The r o c k s
from 2710' t o 2830' a r e a t a m a t u r e m a t u r a t i o n l e v e l , which i s cons i d e r e dt ob ew i t h i nt h eo i l - g e n e r a t i n g
window. From 4420' t o 6300'
t h e t h e r m a l m a t u r i t y i n c r e a s e s t o a very mature maturation level a t
which m a t u r i t y , o n l y wet g a s and condensate would be expected t o have
beengenerated.
Below 6300' t h et h e r m a lm a t u r i t yo ft h es e d i m e n t s
increase to severely altered maturation levels, wherein only thermallyderived methane gas could have been generated.
-
These m a t u r i t y i n t e r p r e t a t i o n s a r e based on t h e c o l o r a t i o n of t h e
kerogenisolated
from thesamplesanalyzed(Table111).Vitrinite
r e f l e c t a n c e a n a l y s i s wasperformed on onesample (2243-001) from t h e
Fusselman,howeverno
v i t r i n i t e was observed.
B.
HydrocarbonSourceCharacterization
of
Sediments
The rocks within the Fusselman,
Montoya, El Paso and dolomites i n t h e
Bliss sandstone are organic-lean (Table
I) withpoorhydrocarbon
generating characteristics.
The c l a s t i c s e c t i o n of t h e Simpson from 4355' t o 4450' i s a l s o o r g a n i c l e a n and i s r a t e d a s a poorhydrocarbonsourceunit.
However, t h e
4450' t o 4 8 7 0 ' , c o n t a i n s
carbonatesectionwithinthe
Simpson,from
f a i r t o good c a r b o n a t eo r g a n i cr i c h n e s s( T a b l e
I). As a r e s u l t , t h i s
t o possible
carbonate interval is characterized as a very mature, fair
gas-condensate
hydrocarbon
source
unit.
r
e
s
u
l
t s of t h e
The
good wet
analyses
performed
on
these
carbonate
i
n
d
i
c
a
te that
r
o
c
k
s
pyrolysis
theyarehydrocarbon-lean.This
i s probablydue t o t h e fact t h a t
these rocks are generating light hydrocarbons
(C -C ), which a r e some2 7
times n o t r e c o r d e d i n t h i s a n a l y s i s .
Mr. Clayton Valder
-3-
March 5, 1982
W i t h i n t h e s a n d s and s i l t s a t well i n t e r v a l 2700' t o 2830'. above
t h e Fusselman, good S1 and S v a l u e s were r e c o r d e d i n t h e p y r o l y s i s
a n a l y s i s .S i n c es a n d s
and s2il l t s are nonhydrocarbonsourcerocks,
we
interpret this high concentration
of hydrocarbon t o r e p r e s e n t e i t h e r
reservoir, out-of-place hydorcarbon, or
else some formofcontamination
A t t h i s time we are u n a b l e t o d e t e r m i n e
(oil-base mud, pipedope).
whichof t h e above two are r e s p o n s i b l e f o r t h e s e h i g h p y r o l y s i s v a l u e s ,
however by e x t r a c t i o n , l i q u i d chromatographyand CI5+ paraffin-naphthene
gas chromatography w e would b e a b l e t o g i v e a n i n t e r p r e t a t i o n of t h e
n a t u r e of t h i s hydrocarbon.
Should you h a v e a n y q u e s t i o n s c o n c e r n i n g t h i s d a t a , o r i f
further service please feel free
t o c o n t a c t us.
we may b
bee ofof
Sincerely,
P a u l Tybor
GEOCHEM LABORATORIES, INC.
st
Enclosures
kAL49
SUMMARY TABLE 1
Orqanlc Rlchness
Agc
Stratlgrrphlc
Unl t
Tvp
(Feet)
Lltholow
SILURIAN
Fusselman
Percent
Drganlc
Carbon
ROCK-EVAL
PYROLYSIS
Mean
kan
&
S1
.
Predomlnant
Kerogen Type
Ulsual
Assessment
5,
Mean
Thermal Maturity
Kerogen
Vltrinltc
Alteratlon
Reflectance
(1-5 Scale)
( I Ro)
Mean
27004015
Dolanite, l i g h t
to medium gray,
sand, s i l t , and
dolomite frm
(16)
2700' to 2830'. 1.770.13
40154335
Oolmite,light
t o medium gray.
(5)
0.03
n.a.
n.a.
4335-
Shale, (1)
sand,
dolomite.
(1)
0.28
0.09
(1)
0.18
(11
Am(A1);-;-
(1)
3
(6)
0.19
(21)
(2)
Ani(Ai);-;-
(2)
0.08
(2)
0.09
(18)
0.04
n.a.
n.a.
(2)
Am(A1) ,-;n.a.
(2)
(1)
0.07 n.a.
n.a.
(2)
2.85
(2)
#%I;-;-
either
2+ t o
"CTER
kan
-
reser-
(2)
H V O R ~ B O HWRCE
No
Vti itor inn.i t e
3
Mature, poorhydrocarbon
source. High pyrolysis
values r e f l e c t
v o i r hydrocarbon i n the
c l a s t i c s o r e l s e contamina-
OROOVICIAN
Montoya
4450Simpson
Simpson
4450Dark Lime
4870
Limestone,
shale,
dolomite.
E l Paso
48706390
Dolomite, medium dark
gray.
Bliss
Dolomite
Dolomite, s i l i 6490cious, medium
6530gray. dark
Very mature,poor
(1)
n.a.
(1)
Am(Al)-I;-;-
n.a. bon
3
bon
n.a.
n.a.
n.a.
poor
Very mature,
source.
hydrocar-
Very mature, f a i r t o p o s s i b l e
good w e t gas-condensate
source.
Very mature,poorhydrocarbon
source.
3
3+ t o 4-
hydrocar-
source.
n.a.
Verymature,poor
source.
hydrocarbon
Table I
SCREEN ANALYSIS SUMMARY
GeoChem
Samp1e
Number
We1 1
Interval
(Feet)
2243-001
2700-2710
Composite:
2243-002
2760-2770
Siltstone, slightly dolomitic, grayish purple.
0.32
2243-003
2820-2830
Siltstone, slightly dolomitic,
gray.
l i g h t blush
0.36
2243-DO4
3000-3010
Anhydrite.
2243-005
3060-3070
Composite: dolomite and anhydrite.
2243-006
3120-3130
Composite:
shale.
dolomite and limestone;trace
2243-007
3180-3190
Composite:
limestone and dolomite.
2243-008
3430-3440
Dolomite, l i g h t gray t o medium gray.
2243-009
3510-3520
Dolomite,very
l i g h t gray to medium light gray.
0.02
2243-010
3570-3580
Dolomite,very
l i g h t gray t o medium gray.
0.04
2243-011
3630-3640
Dolomite,very l i g h t gray to medium gray; trace
o f chert and anhydrite.
2243-012
3690-3700
Dolomite, white t o very l i g h t gray.
2243-013
3750-3760
Dolomite, white t o very l i g h t gray.
0.02
2243-014
3810-3820
Dolomite,white
t o very l i g h t gray.
0.02
2243-015
3870-3880
Dolomite,white
t o very l i g h t gray.
0.02
2243-016
3930-3940
Composite:
dolomite and chert;trace
2243-017
3990-4000
Composite:
dolomite and chert.
2243-018
4050-4060
Composite:
anhydrite.
dolomite and chert;trace
2243-Dl9
4110-4120
Composite:
dolomite and chert.
0.04
2243-020
4200-4210
Composite:
dolomite and chert.
0.02/0.02
2243-021
4260-4270
Composite:
dolomite and chert.
0.03
Total Organic
Carbon
(% of Rock)
Brief Lithological
Description
sand,siltstone,
and dolomitic.
No sample given.
0.92
no sample
0.05/0.05
of
0.10
0.03
.
0.03
0.03
0.03/0.02
o f shale.
0.03
0.01
of
0:02
Tablp I:
SCREEN ANALYSIS SUMMARY
GeoChem
We1
Sample
Number
1
Interval
(Feet)
Brief
Lithological
Description
Total Organic
Carbon
(%o f Rock)
2243-022
4320-4330
Composite: dolomite and chert.
0.02
2243-023
4410-4420
Composite: shale, sand,and dolomite.
0.28
2243-024
4480-4490
Composite: shale, dolomite,and sand; trace
o f limestone.
0.29
2243-025
4540-4550
Composite: limestone, dolomite,and shale.
0.18
2243-026
4610-4620
Composite: limestone, shale,and dolomite.
0.30
2243-027
4680-4690
Composite: limestone, shale,and dolomite.
0.13
2243-028
4750-4760
Composite: limestone, shale, and dolomite.
0.11
2243-029
4820-4830
Composite: limestone, shale, dolomite and
chert.
0.10/0.10
2243-030
4940-4950
Composite: limestone, shale, dolomite and
chert.
0.11
2243-031
5010-5020
Composite: dolomite, shale, and chert.
0.09
2243-032
5070-5080
Composite: dolomite, limestone, shale and
chert.
0.06
2243-033
5160-5170
Composite: dolomite, limestone, shale and
chert.
0.07
2243-034
5270-5280
Composite: dolomite, limestone, shale and
chert.
0.05
2243-035
5330-5340
Composite: dolomite, limestone, shale and
chert.
0.05
2243-036
5390-5400
Dolomite, brownish gray.
2243-037
5450-5460
Composite: dolomite and limestone.
0.03
2243-038
5510-5520
Composite: dolomite and limestone.
0.03
2243-039
5590-5600
Composite: dol omi
te and 1imestone.
0.05
2243-040
5650-5660
Composite: dolomite and limestone.
0.01
0.04/0.03
Table I
SCREEN ANALYSIS SUMMARY
1
GeoChem
Samp1e
Number
Organic
Total
Lithological
Interval
Brief
Description
Carbon
( X of Rock)
~~~~~
~~
2243-041
5750-5760
Dolomite: medium dark gray; traceof chert.
0.03
2243-042
5820-5830
Composite: dolomite and limestone.
0.03
2243-043
5900-5910
Composite: dolomite and limestone.
0.01
2243-044
5970-5980
Composite: dolomite and shale.
0.04f0.04
2243-045
6030-6040
Composite: dolomite and shale.
0.02
2243-046
6130-6140
Composite: dolomite and chert.
0.02
2243-047
6290-6300
Composite: dolomite and igneous? Trace of
chert.
0.07
2243-048
6510-6520
Dolomite, silicified, medium dark gray.
0.07
700-2710
T.O.C.
s1
s2
s3
PC*
Hydrogen
Index
mysen
Index
TABLE r I
RESULTS OF ROCK-EVAL PYROLYSIS
2243-001
2243-003
2243-023
332
2243-025
2243-026
3.85
407
354
255
2820-2830
4410-4420
4540-4550
4610-4620
362
3.18
0.35
0.09
0.06
0.09
0.16
1.85
0.18
0.09
0.03
0.79
0.57
0.76
0.39
0.51
0.45
0.35
0.43
0.50
PI
Tmx
0.58
0.18
0.02
0.01
0.01
= Totalorganic
carbon, ut. S
Free hydrocarbons. .B HClg cP rock
:Residual hydrocarbon potential
(as HClg c t rock)
= C02 produced From kerogen pyrolysis
(mg COZ/g or rock)
= 0.083 (SI + S 2 )
e
.8 HC/g organic carbon
i
ag C02/g organic carbon
= SI/S1+S2
= Temperature Indu,
degrees
0.92
0.36
0.28
0.18
0.30
418
513
C.
85
158
TABLE
VlTRlNlTE
GEOCHEM
SAMPLE
NUMBER
2243-001
DEPTH
(ld)
2710
REFLECTANCE
rYPE
NUMBER
OF
POPULATION
OF
SAMPLE
READINGS
CrG
IV
No VITRINITE
SUMMARY
MINIMUM
MAXIMUM
MEAN
REFLECTANCE REFLECTANCE REFLECTANCE
STD.
DEV.
( % Ro)
( % Ro)
( %o Ro)
(70R o )
REMARKS