Log-Derived Regional Source-Rock 

Characteristics of the Woodford Shale, 

Anadarko Basin, Oklahoma

U.S..GEOLOGICAL SURVEY BULLETIN 1866-D

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Chapter D

Log-Derived Regional Source-Rock 

Characteristics of the Woodford Shale, 

Anadarko Basin, Oklahoma

By TIMOTHY C. HESTER, JAMES W. SCHMOKER, 

and HOWARD L SAHL

A multidisciplinary approach to research studies of sedimentary 

rocks and their constituents and the evolution of sedimentary 

basins, both ancient and modern

U.S. GEOLOGICAL SURVEY BULLETIN 1866 

EVOLUTION OF SEDIMENTARY BASINS ANADARKO BASIN
DEPARTMENT OF THE INTERIOR 

MANUEL LUJAN, JR., Secretary

U.S. GEOLOGICAL SURVEY 

Dallas L Peck, Director

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For sale by the

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Library of Congress Cataloging-in-Publication Data

Hester, Timothy C.

Log-derived regional source-rock characteristics of the Woodford Shale, 

Anadarko Basin, Oklahoma / by Timothy C. Hester, James W. Schmoker, and 

Howard L. Sahl.

p. cm. (Evolution of sedimentary basins Anadarko Basin ; ch. 

D) (U.S. Geological Survey bulletin ; 1866)

"A multidisciplinary approach to research studies of sedimentary rocks and 

their constituents and the evolution of sedimentary basins, both ancient and 

modern."

Supt. of Docs, no.: I 19.3: 1866D

1. Shale Oklahoma. 2. Geology, Stratigrahic Devonian. 3. Geology, 

Stratigraphic Mississippian. 4. Geology Oklahoma. 5. Anadarko Basin.

I. Schmoker, J.W. II. Sahl, Howard L III. Title. IV. Series. V. Series: 

U.S. Geological Survey bulletin ; 1866. 

QE75.B9 no. 1866-D 

[QE471.15.S5] 

557.3 s dc20

[552'.5] 89-600220

CIP
CONTENTS

Abstract Dl

Introduction Dl

Geologic setting D2

Data set D3

Depositional patterns D3

Total organic carbon D7

Mass of organic carbon D8

Summary DIG

References cited D26

Appendix 1. List of wells used in study D28

2. Tabulation of data D30

FIGURES

1. Map showing location of study area, lines of cross sections, locations of 

wells, and major structural features, Anadarko basin, Oklahoma D2

2. Diagram showing characteristic log signatures of lower, middle, and upper

members of Woodford Shale D3 

3-4. Maps showing:

3. Depth below sea level of top of Woodford Shale D4

4. Vitrinite reflectance of Woodford Shale D5

5. Crossplot of laboratory analyses of total organic carbon versus log-derived 

average formation density of equivalent interval for lower and upper shale 

members of the Bakken Formation of the Williston basin, Appalachian 

Devonian shales, and the Woodford Shale D6 

6-9. Maps showing thickness of:

6. Woodford Shale D7

7. Lower member of Woodford Shale D8

8. Middle member of Woodford Shale D9

9. Upper member of Woodford Shale DIG 

10-11. Histograms showing distributions of thickness of:

10. Lower, middle, and upper members of Woodford Shale Dll

11. Southwest and northeast regions of lower, middle, and upper

members of Woodford Shale Dll 

12-13. Cross sections of Woodford Shale:

12. Southwest-northeast (A-A', B-B', and C-C') D12

13. Northwest-southeast (D-Dr , E-E, F-F', and G-G') D13 

14. Histograms showing distributions of total organic carbon of lower, middle,

and upper members of Woodford Shale D14 

15-18. Maps showing total organic carbon of:

15. Woodford Shale D15

16. Lower member of Woodford Shale D16

17. Middle member of Woodford Shale D17

18. Upper member of Woodford Shale D18

Contents III
19. Crossplots of total organic carbon versus thickness for lower, middle, and 

upper members of Woodford Shale D19

20. Histograms showing distributions of total organic carbon of southwest and 

northeast regions of lower, middle, and upper members of Woodford 

Shale D19

21. Crossplots of total organic carbon versus burial depth for lower, middle,

and upper members of Woodford Shale D20 

22-25. Maps showing mass of organic carbon per unit surface area for:

22. Woodford Shale D21

23. Lower member of Woodford Shale D22

24. Middle member of Woodford Shale D23

25. Upper member of Woodford Shale D24

26-27. Histograms showing distributions of mass of organic carbon per unit 

surface area of:

26. Lower, middle, and upper members of Woodford Shale D25

27. Southwest and northeast regions of lower, middle, and upper 

members of Woodford Shale D25

TABLE

1. Mass of organic carbon in lower, middle, and upper members of Woodford 

Shale in study area D25

CONVERSION FACTORS FOR SOME SI METRIC AND U.S. UNITS OF MEASURE

____To convert from__________To______________Multiply by_________ 

Feet (ft) Meters (m) 0.3048 

Miles (mi) Kilometers (km) 1.609 

Pounds (Ib) Kilograms (kg) 0.4536 

Degrees Fahrenheit (°F) Degrees Celsius (°C) Temp °C = (temp °F-32)/1.8

IV Contents
EVOLUTION OF SEDIMENTARY BASINS-ANADARKO BASIN

Log-Derived Regional Source-Rock 

Characteristics of the Woodford Shale, 

Anadarko Basin, Oklahoma

By Timothy C. Hester, James W. Schmoker, and Howard L Sahl

Abstract

The Woodford Shale is an organic-rich, highly 

compacted, "black" shale of Late Devonian and Early 

Mississippian age that is widely regarded as a major 

hydrocarbon source rock in the Anadarko basin of 

Oklahoma. The Woodford is divided here, on the basis of log 

character, into three informal stratigraphic units: the lower, 

middle, and upper members of the Woodford Shale. Higher 

kerogen content of the middle member is the physical basis 

for this subdivision. Because source-rock properties of each 

member differ, geochemical and other data are best 

considered in view of internal Woodford stratigraphy.

Isopachs of the Woodford and its three members reveal 

a positive structural feature, parallel with and about 75 miles 

(120 kilometers) north of the Wichita Mountains front, that 

divided the Woodford into northeast and southwest depocenters and was a hinge line separating areas of regional 

basement flexure during Woodford time. Lower and middle 

members of the Woodford thicken to the southwest into the 

now-eroded central trough of the southern Oklahoma aulacogen. The upper member thickens to the northeast toward 

Kansas, reflecting initial development of the Sedgwick basin 

of south-central Kansas.

Total organic carbon (TOC, in weight percent) is 

calculated here from log-derived formation density (pb, 

g/cm3) using the equation: TOC = (156.956/pb)-58.272. TOC 

of the lower, middle, and upper members of the Woodford 

Shale averages 3.2,5.5, and 2.7 weight percent, respectively. 

TOC does not correlate with formation thickness, but does 

decrease with increasing thermal maturity in response to the 

progressive generation and expulsion of hydrocarbons.

The total amount of organic carbon in the Woodford 

Shale of the study area is evenly divided between the lower, 

middle, and upper members. Of the 73 trillion kilograms of

Manuscript approved for publication, June 14, 1989.

organic carbon mapped here, some 54 trillion kilograms are 

in thermally mature areas characterized by vitrinite 

reflectance (R0) greater than 0.6 percent. Most of the hydrocarbons sourced by the Woodford Shale of the study area 

were generated from the lower and middle members, in that 

these two members contain 74 percent of the thermally 

mature organic carbon.

INTRODUCTION

The Woodford Shale is one of several organic-rich 

"black" shales of Late Devonian and Early Mississippian 

age present in basins of the North American craton. 

Other examples of similar age include the Antrim Shale 

of the Michigan basin, the New Albany Shale of the 

Illinois basin, the lower and upper members of the 

Bakken Formation of the Williston basin, the Exshaw 

Formation of the Alberta basin, and the "Devonian" 

shales of the Appalachian basin. Where thermally 

mature, these black shales are economically important as 

hydrocarbon source rocks.

The Woodford Shale is widely regarded as a major 

source rock in the Anadarko basin (Cardott and Lambert, 1985). This report describes regional depositional 

trends and organic-carbon content of the Woodford 

Shale as evidenced by wire-line logs in the Oklahoma 

portion of the Anadarko basin (fig. 1). The relation 

between depositional patterns and organic-carbon 

content is discussed, and the mass and distribution of 

organic carbon in thermally immature and mature areas 

of the Woodford Shale is estimated. To better document 

variations and regional trends within the Woodford 

Shale, the formation is considered here in terms of three

Source-Rock Characteristics, Woodford Shale, Anadarko Basin, Oklahoma D1
100

Approximate bounda 

of Anadarko basin

AMARILLO-WICHITA ' UPLIFT

36°-

0 10 20 30 40 50 60 MILES

0 10 20 30 40 50 60 KILOMETERS

Figure 1. Location of study area, lines of cross sections, locations of wells used in study, and major structural features, 

Anadarko basin, Oklahoma. Shaded zone separates southwest and northeast regions of figures 11, 20, and 27. Wells are 

identified by number in appendix 1.

informal members (Hester and others, 1988) analogous 

to those described by Ellison (1950) for the Woodford 

Shale in the Permian basin of west Texas and southeast 

New Mexico.

GEOLOGIC SETTING

The Late Devonian and Early Mississippian age 

Woodford Shale is present throughout most of the 

Oklahoma portion of the Anadarko basin. The Woodford is deposited on a major regional unconformity 

developed in the Late Devonian (Amsden, 1975) and is 

conformably overlain by shales and limestones of Early 

Mississippian (Kinderhookian) age. Total thickness 

ranges from near zero to about 125 ft (40 m) on the 

extensive northern shelf areas and increases to more than 

900 ft (270 m) in limited parts of the deep Anadarko

basin (Amsden, 1975). Maximum thickness in the area of 

this study (fig. 1) is about 300 ft (90 m).

The Woodford is a highly radioactive, carbonaceous and siliceous, dark-gray to black shale. In 

most areas of the basin, total organic carbon (TOC) of 

the Woodford Shale exceeds a commonly accepted shale 

source-rock minimum of 0.5 weight percent (Tissot and 

Welte, 1984). Organic matter in the Woodford is thought 

to be a mixture of type II and type III kerogens preserved 

as a result of deposition in anoxic (but not necessarily 

extremely deep) waters (Heckel, 1972; Cluff, 1981). 

Large areas of the Woodford Shale have attained the 

maturation levels required for hydrocarbon generation 

(Schmoker, 1986).

In terms of wire-line character, the Woodford 

Shale can be generally described as two similar shales 

separated by a less dense, more radioactive, and often 

more resistive middle member (Hester and others,

D2 Evolution of Sedimentary Basins Anadarko Basin
1988). For this reason, the Woodford is considered here 

to consist of three informal stratigraphic units: the lower, 

middle, and upper members of the Woodford Shale. The 

typical log character of these three members is illustrated 

in figure 2. The Woodford and its members were 

identified in the 99 wells of this study (fig. 1) by Hester 

and others (1988).

The Anadarko basin is a Paleozoic basin that 

formed in two stages. The Woodford Shale was deposited 

upon the predominantly carbonate sediments of the 

first-stage southern Oklahoma aulacogen (Feinstein, 

1981). The present-day configuration of the basin, 

reflected by structure on top of the Woodford (fig. 3), 

developed primarily in a post-Woodford (Pennsylvanian 

and Permian), second-stage foreland-style basin.

The Woodford Shale dips into the Anadarko basin 

from subsea depths of roughly 4,000 ft (1,200 m) near the 

Kansas-Oklahoma border to more than 25,000 ft (7,600 

m) near the Amarillo-Wichita uplift (fig. 3) and thus 

encompasses an unusually broad range of thermal maturities. Vitrinite reflectance (R0 ) ranges from slighty less 

than 0.5 percent on the northern shelf to well over 2.0 

percent in the deep basin (fig. 4). Thermal maturity 

trends are generally similar to structural trends, although 

vitrinite-reflectance contours cut those of present-day 

structure in parts of the central and northeastern study 

area.

GAMMA-RAY DENSITY RESISTIVITY

Upper member

Middle member 

Lower member

Figure 2. Characteristic log signatures of lower, middle, 

and upper members of Woodford Shale (well 75, appendix 

1). Modified from Hester and others (1988).

DATA SET

Data of this report, collected from 99 wells 

distributed throughout the study area (fig. 1, appendix 1), 

are tabulated in appendix 2. In each well, depth, 

thickness, and average formation density are taken 

directly from wire-line logs. Total organic carbon is 

calculated from average formation density (equation 1), 

and the mass of organic carbon per unit surface area is 

calculated using equation 2. Vitrinite reflectance at each 

well location is picked from contoured data of Cardott 

and Lambert (1985) and B.J. Cardott (Oklahoma 

Geological Survey, written commun., 1987).

Because the specific gravity of kerogen is low 

relative to that of shale matrix minerals (Smith and 

Young, 1964; Kinghorn and Rahman, 1983), variations in 

the formation density of organic-rich, low-porosity shales 

such as the Woodford can be equated to changes in 

organic-matter content (Schmoker, 1979; 1980; Hashmy 

and others, 1982). Total organic carbon (weight percent) 

is calculated here according to the equation (Schmoker 

and Hester, 1983, equation 7):

TOC =(A/pb )-B, (1)

where pb is average formation density (g/cm3 ), A = 

156.956 and B = 58.272.

A and B are empirically derived constants 

incorporating shale and organic-matter properties and 

interactions. These constants are determined from the 

least-squares fit to the crossplot of 148 pairs of 

laboratory TOC analyses and log-derived formation 

densities (fig. 5). The calibration data represent four 

organic-rich black shales of Late Devonian and Early 

Mississippian age of which the Woodford is a typical 

example. The least-squares fit to the data of figure 5 has 

a correlation coefficient of -0.97.

TOC is independent of thickness and thus does not 

reflect the total amount of kerogen in a formation. To 

better characterize source-rock properties of the Woodford Shale, the mass of organic carbon per unit surface 

area (OC/cm2) is introduced:

OC/cm2 =(TOC/100)(pb )(DZ), (2)

where DZ is formation or member thickness (cm) and 

OC is in grams.

DEPOSITIONAL PATTERNS

The total thickness of the Woodford Shale is less 

than 125 ft (40 m) over most of the study area (fig. 6) but 

increases rapidly to the south near the Amarillo-Wichita 

uplift. The Woodford isopach map of figure 6 depicts the 

northern shelf area of the southern Oklahoma aulacogen

Source-Rock Characteristics, Woodford Shale, Anadarko Basin, Oklahoma D3
37' 100° 99° 97°

36'

.KANSAS

OKLAHOMA

TEXAS

10 20 30 40 50 BO MILES

I I I I I 

0 10 20 30 40 50 BO KILOMETERS

Figure 3. Depth below sea level of top of Woodford Shale. Contour interval 1,000 ft (305 m); dots show well locations (fig. 

1, appendix 1).

prior to the rapid subsidence of Pennsylvanian and 

Permian time.

The heavy arrow of figure 6 marks the axis of a 

structural element that divides the study area into 

southwest and northeast regions. As seen in subsequent 

figures, this positive feature influenced deposition 

throughout Woodford time and was a hinge line 

separating areas of regional basement flexure and downwarping.

Local thickness variations of the lower member of 

the Woodford Shale (fig. 7) reflect the eroded and 

karsted surface on which it was unconformably 

deposited. The structural element marked in figure 6 

separates the lower member of the Woodford into two 

distinct depocenters (fig. 7). Maximum thickness in the 

northeast depocenter is only about 25 ft (8 m). Isopachs 

of the southwest depocenter do not close in the study 

area but show thickening into the (now eroded) deep axis 

of the southern Oklahoma aulacogen. Figure 7 indicates 

that during deposition of the lower member of the

Woodford the northeast region of the study area was 

quite stable, but the central trough of the southern 

Oklahoma aulacogen was actively subsiding.

Because the lower member tended to smooth and 

bury pre-Woodford topography, the thickness of the 

middle member of the Woodford Shale (fig. 8) varies 

more uniformly than that of the lower member. Like the 

lower member, maximum thickness in the northeast 

depocenter is about 25 ft (8 m). In the southwest 

depocenter, the middle member gradually thickens into 

the deep axis of the southern Oklahoma aulacogen (fig. 

8). Figure 8 indicates continued stability of the northeast 

depocenter and moderate subsidence of the central 

trough of the southern Oklahoma aulacogen during 

middle Woodford time.

In contrast to the lower and middle members, 

isopachs of the upper member of the Woodford Shale do 

not close in the northeast depocenter, but show 

thickening to the northeast into Kansas (fig. 9). Also in 

contrast to the lower and middle members, the upper

D4 Evolution of Sedimentary Basins Anadarko Basin
37' 100° 99° 98° 97°

36'

KANSAS 

OKLAHOMA

0 10 20 30 40 50 60 MILES

0 10 20 30 40 50 60 KILOMETERS

Figure 4. Vitrinite reflectance of Woodford Shale. Contour interval 0.1 percent R0. Contoured from data of Cardott and 

Lambert (1985) and B.J. Cardott (Oklahoma Geological Survey, written commun., 1987).

member does not thicken appreciably to the southwest 

near the Amarillo-Wichita uplift. Figure 9 indicates a 

shift in depositional pattern during upper Woodford time 

due to both initial development of the Sedgwick basin of 

south-central Kansas (Kelly and Merriam, 1964) and 

marked slowing of subsidence along the axis of the 

southern Oklahoma aulacogen.

Average thickness of both the lower and upper 

members of the Woodford Shale is about 30 ft (9 m), but 

thickness distributions of these two members appear 

quite different (fig. 10). The thickness distribution of the 

lower member (fig. 10) reflects deposition on an 

irregular, eroded and karsted surface that had greater 

topographic relief in the southwest region than in the 

northeast region (fig. 11). The bimodal thickness 

distribution of the upper member (fig. 10) reflects a 

significantly greater accumulation of sediment in the 

northeast region than in the southwest region (fig. 11).

The middle member has an average thickness of 

only 20 ft (6 m) (fig. 10). In the southwest region, the

thickness distribution of the middle member resembles 

that of the lower member, but with no outliers. In the 

northeast region, the middle member is thin and 

approximates a uniform blanket of sediment (fig. 11).

Depositional relationships between the three 

members of the Woodford Shale suggested by figures 

7-11 are more easily visualized in the smoothed regional 

cross sections of figures 12 and 13. The middle member 

generally onlaps the lower member. The upper member 

tends to offlap the middle member in the southwest 

region and to onlap the middle member in the northeast 

region, reflecting the shift of deposition to the northeast 

during late Woodford time. The series of basement 

movements indicated by figures 12 and 13 hinged along 

the northwest-trending axis identified in figure 6. Woodford depositional patterns (figs. 12, 13) depict the 

transition between the first-stage southern Oklahoma 

aulacogen and the second-stage Pennsylvanian and Permian foreland downwarping that together shaped the 

present-day Anadarko basin.

Source-Rock Characteristics, Woodford Shale, Anadarko Basin, Oklahoma D5
20

18

16

14

(J 

DC

CO 

DC

5

(J

Z

12

10-

6-

2.00

EXPLANATION

® Upper member, Bakken Formation 

A Lower member, Bakken Formation 

B Woodford Shale 

. Appalachian Devonian shales

2.10 2.20 2.30 2.40 2.50 2.60 

AVERAGE FORMATION DENSITY, IN GRAMS PER CUBIC CENTIMETER

2.70

Figure 5. Laboratory analyses of total organic carbon (TOC) versus log-derived average formation density (pb) 

of equivalent interval for lower and upper shale members of the Bakken Formation of the Williston basin (Schmoker 

and Hester, 1983), Appalachian Devonian shales (Schmoker, 1979), and the Woodford Shale (Hester and 

Schmoker, 1987).

D6 Evolution of Sedimentary Basins Anadarko Basin
37' 100° 99° 98° 97°

36'

KANSAS

TEXAS

60 MILES

0 10 20 30 40 50 60 KILOMETERS

Figure 6. Thickness of Woodford Shale; contour interval 25 ft. Arrow marks axis of structural feature that separates 

Woodford into northeast and southwest regions. Area where Woodford Shale is absent is hachured; dots show well 

locations (fig. 1, appendix 1).

TOTAL ORGANIC CARBON

Total organic carbon (TOC) of the lower, middle, 

and upper members of the Woodford Shale averages 3.2, 

5.5, and 2.7 weight percent, respectively (fig. 14), and is 

rarely less than a commonly accepted shale source-rock 

minimum of 0.5 weight percent (Tissot and Welte, 1984). 

As calculated from density logs, the middle member is 

significantly richer in organic carbon than the lower and 

upper members (fig. 14). Higher kerogen content 

accounts for the lower density, higher gamma-ray 

intensity, and moderately higher resistivity typical of the 

middle member (fig. 2) and is the physical basis for 

the subdivision of the Woodford Shale into three 

members according to log character.

Total organic carbon of the Woodford Shale and its 

three members is mapped in figures 15-18. Local 

variations in TOC probably relate to the accumulation

and preservation of kerogen early in the depositional 

history of the formation. The general grain of the 

contours, however, tends to parallel present-day 

structure (fig. 3) and thermal maturity (fig. 4) and 

probably reflects regional processes of kerogen 

maturation during burial. The lowest values of TOC 

occur along the western edge of the lower and upper 

members and are perhaps indicative of poor organicmatter preservation at the time of deposition. Other 

occurrences of thinning or pinchout are not 

characterized by unusually low TOC values (figs. 16-18). 

TOC does not decrease as thickness decreases to near 

zero (fig. 19), showing that organic matter was in general 

not anomalously degraded near depositional edges. At 

the other extreme, TOC does not decrease as thickness 

increases (fig. 19), showing that a fixed supply of organic 

matter was not diluted by varying rates of clastic 

sedimentation.

Source-Rock Characteristics, Woodford Shale, Anadarko Basin, Oklahoma D7
100'

36°-

0 10 20 30 40 50 60 KILOMETERS

Figure 7. Thickness of lower member of Woodford Shale; contour interval 25 ft. Areas where lower member is absent are 

hachured; dots show well locations (fig. 1, appendix 1).

Thermal maturity of the northeast region of the 

study area is significantly lower than that of the southwest 

region. TOC of each member of the Woodford Shale 

tends to be higher in the northeast region than in the 

southwest region (fig. 20). Lower TOC associated with 

higher thermal maturity is interpreted here to result from 

the progressive depletion of organic carbon by the 

conversion of kerogen to oil and gas and the subsequent 

expulsion of these hydrocarbons from the formation. The 

middle member, which is a better source rock in terms of 

TOC than the lower and upper members (fig. 14), also 

appears to be a better source rock in terms of generation 

potential and expulsion efficiency (fig. 20). An alternative 

but less likely explanation for the differences between 

northeast and southwest regions apparent in figure 20 is 

that the original, preserved quantity of organic matter 

decreased regionally from northeast to southwest.

Crossplots of TOC versus burial depth (fig. 21) 

show that maximum values of TOC decrease by 3-4 

weight percent in each member of the Woodford Shale as

D8 Evolution of Sedimentary Basins Anadarko Basin

depth increases to about 18,000 ft (5,500 m), or as 

vitrinite reflectance increases to about 2.0 percent. This 

decrease of maximum TOC with depth, like the decrease 

of average TOC from northeast to southwest regions (fig. 

20), is attributed here to the progressive loss of organic 

carbon from the formation as hydrocarbons are 

generated and expelled. At depths greater than 18,000 ft 

(5,500 m), maximum values of TOC no longer decline 

(fig. 21), suggesting that the potential for generation of 

additional hydrocarbons has been largely exhausted. 

About 40-50 percent of the organic carbon originally 

preserved in the Woodford Shale remains in the 

formation at high thermal maturities in the form of inert 

kerogen or unexpelled hydrocarbons (fig. 21).

MASS OF ORGANIC CARBON

(OC/cm

The mass of organic carbon per unit surface area 

cm2 ), calculated using equation 2, combines
0 10 20 30 40 50 60 KILOMETERS

Figure 8. Thickness of middle member of Woodford Shale; contour interval 25 ft. Area where middle member is absent 

is hachured; dots show well locations (fig. 1, appendix 1).

thickness and TOC and can be thought of as the grams of 

organic carbon that would be recovered in a 1-cm2 core 

through the formation. Maps of OC/cm2 for the Woodford Shale and its three members (figs. 22-25) are 

characterized by relatively smooth regional trends. These 

trends correlate with those of corresponding isopach 

maps (figs. 6-9), reflecting the fact that percent changes 

in thickness tend to exceed those of TOC or formation 

density.

For the Woodford as a whole, OC/cm2 in the 

northeast region ranges as high as 400 g/cm2 ; OC/cm2 in 

the southwest region is as high as 600 g/cm2 at the 

extreme southern edge of the mapped area (fig. 22). 

These values are of the same magnitude as those 

determined in similar fashion for the Bakken Formation 

of the Williston basin, in which OC/cm2 is as high as 350 

g/cm2 in the lower shale member and 150 g/cm2 in the 

upper shale member (Schmoker and Hester, 1983).

The distributions of OC/cm2 for the lower, middle, 

and upper members of the Woodford Shale have nearly

identical means of 77, 76, and 70 g/cm2, respectively, and 

are similar in general appearance for values of OC/cm2 

greater than the means (fig. 26). However, the mode of 

the lower- and upper-member distributions is 0-25 

g/cm2 , whereas only 5 percent of middle-member values 

fall in this range. The mode of the middle-member 

distribution is 50-75 g/cm2 (fig. 26).

The thermal maturity of the Woodford Shale in the 

southwest region is generally greater than that of peak oil 

generation, whereas the Woodford in the northeast 

region is generally immature to marginally mature. 

Distributions of OC/cm2 for the northeast depocenter 

reflect kerogen that has retained its potential to generate 

hydrocarbons, and distributions of OC/cm2 for the 

southwest depocenter reflect kerogen whose generative 

potential has been significantly depleted (fig. 27).

The total mass of organic carbon in each member 

of the Woodford Shale in the mapped area, estimated by 

planimetering the isopleths of figures 23-25, is measured 

in the tens of trillions of kilograms (table 1). Somewhat

Source-Rock Characteristics, Woodford Shale, Anadarko Basin, Oklahoma D9
100

36

0 10 20 30 40 50 60 KILOMETERS

Figure 9. Thickness of upper member of Woodford Shale; contour interval 25 ft. Areas where upper member is absent are 

hachured; dots show well locations (fig. 1, appendix 1).

surprisingly, the total amount of organic carbon in the 

Woodford Shale is evenly divided between its three 

members (table 1).

Of the 73 trillion kilograms of organic carbon in the 

Woodford Shale of the study area (table 1), some 54 

trillion kilograms are in thermally mature areas 

characterized by R0 >0.6 percent, and 38 trillion 

kilograms are in areas where R0 is > 1.3 percent. As a 

point of comparison, the two shale members of the 

Bakken Formation in North Dakota and Montana 

contain 126 trillion kilograms of organic carbon, of which 

102 trillion kilograms are in thermally mature areas 

(Schmoker and Hester, 1983).

Because the upper member is generally thicker in 

the low-maturity northeast region than the lower and 

middle members combined (fig. 12), geochemical 

analyses to establish baseline values for immature Woodford source rocks are likely to be analyses of the upper 

member. Table 1 shows, however, that most hydrocarbons sourced by the Woodford Shale of the study area 

were generated from the lower and middle members, in 

that these two members contain 74 percent of the 

thermally mature organic carbon. As illustrated by this 

example, geochemical data should be considered in view 

of the three members of the Woodford Shale.

SUMMARY

The Woodford Shale is present throughout most of 

the Anadarko basin of Oklahoma, and is thought to be a 

major source of the basin's hydrocarbons. The Woodford 

Shale is usually treated as a single depositional package, 

in the sense that its physical and chemical properties are 

not considered with respect to vertical stratigraphy. As a 

result, changes in depositional and environmental factors 

during Woodford time that affected the source-rock

D10 Evolution of Sedimentary Basins Anadarko Basin
UPPER MEMBER 

n=94

T T \ I 

MIDDLE MEMBER 

n=95

LOWER MEMBER 

n=78

120 140 160

THICKNESS, IN FEET

Figure 10. Distributions of thickness of lower, middle, and 

upper members of Woodford Shale. Data are from well 

locations of figure 1 (tabulated in appendix 2).

characteristics of the formation have been largely 

unexplored.

In this study, the Woodford Shale is subdivided into 

lower, middle, and upper members on the basis of log 

character. Differing kerogen concentrations account for 

the distinctive character of the three members and are 

the physical basis for this subdivision. Isopachs of the 

three members of the Woodford reveal a positive 

structural feature, parallel with and about 75 mi (120 

km) north of the Amarillo-Wichita uplift, that divided the 

Woodford into northeast and southwest depocenters and 

was a hinge line separating areas of regional basement 

flexure during Woodford time.

Lower and middle members of the Woodford 

Shale thicken to the southwest into the now-eroded 

central trough of the southern Oklahoma aulacogen. The 

upper member thickens to the northeast towards the 

Sedgwick basin of south-central Kansas. In the southwest 

region, present-day thermal maturity of the Woodford is 

generally greater than that of peak oil generation, 

whereas in the northeast region, the Woodford is

i i i i 

MIDDLE MEMBER

Southwest, n=36 

----- Northeast, n=33

UPPER MEMBER

Southwest, n=33 

Northeast, n=33

LOWER MEMBER

Southwest, n= 34 

Northeast, n=30

60 80 100 

THICKNESS, IN FEET

120 140 160

Figure 11. Distributions of thickness of southwest and 

northeast regions of lower, middle, and upper members of 

Woodford Shale. Data are from well locations of figure 1 

(tabulated in appendix 2); southwest and northeast regions 

shown in figure 1.

generally immature to marginally mature. As a result of 

these regional depositional and thermal-maturity trends, 

most hydrocarbons sourced by the Woodford Shale of 

the study area were generated from the lower and middle 

members.

The regional tripartite zonation of the Woodford 

Shale reveals depositional patterns and variations in 

organic-matter content that are obscured if the formation 

is treated as a single unit. Subdivision of the Woodford 

into three informal members, as suggested here, provides 

a framework for the planning and integration of detailed 

source-rock studies of the formation.

Source-Rock Characteristics, Woodford Shale, Anadarko Basin, Oklahoma D11
100-

150-

-100

100- -100

150-

200-

30 KILOMETERS

250-

300-

Figure 12. Southwest-northeast cross sections A-A ', B-B', and C-C' showing Woodford Shale in Anadarko basin. Datum 

is top of upper member. Lines of sections shown on figure 1.

D12 Evolution of Sedimentary Basins Anadarko Basin
50-

100 -I

50 -

100 J

en

C/3

50-

100 J

LOWER -50

-100

100 J

0 10 20

L-250

Figure 13. Northwest-southeast cross sections D-D', E-E', F-F', and G-G' showing Woodford Shale. Datum is top of 

upper member. Lines of section shown on figure 1.

Source-Rock Characteristics, Woodford Shale, Anadarko Basin, Oklahoma D13
0 2 4 6 8 10 

TOTAL ORGANIC CARBON, IN WEIGHT PERCENT

Figure 14. Distributions of total organic carbon (TOC) of 

lower, middle, and upper members of Woodford Shale. TOC 

is calculated from average formation density (see text, 

equation 1). Data are from well locations of figure 1 (tabulated 

in appendix 2).

D14 Evolution of Sedimentary Basins Anadarko Basin
0 10 20 30 40 50 60 MILES

I I I I I I 

0 10 20 30 40 50 60 KILOMETERS

Figure 15. Total organic carbon (TOC) of Woodford Shale; contour interval 1.0 weight percent. TOC is calculated from 

average formation density (see text, equation 1). Area where Woodford Shale is absent is hachured; dots show well 

locations (fig. 1, appendix 1).

Source-Rock Characteristics, Woodford Shale, Anadarko Basin, Oklahoma D15
37' 100° 99° 97°

36'

TEXAS

JKANSAS

OKLAHOMA

10 20 30 50 60 MILES

0 10 20 30 40 50 60 KILOMETERS

Figure 16. Total organic carbon (TOC) of lower member of Woodford Shale; contour interval 1.0 weight percent. TOC is 

calculated from average formation density (see text, equation 1). Areas where lower member is absent are hachured; dots 

show well locations (fig. 1, appendix 1).

D16 Evolution of Sedimentary Basins Anadarko Basin
37' 100° 99° 98° 97°

36'

KANSAS 

OKLAHOMA

TEXAS

0 10 20 30 40 50 60 MILES

0 10 20 30 40 50 60 KILOMETERS

Figure 17. Total organic carbon (TOC) of middle member of Woodford Shale; contour interval 1.0 weight percent. TOG 

is calculated from average formation density (see text, equation 1). Area where middle member is absent is hachured; dots 

show well locations (fig 1, appendix 1).

Source-Rock Characteristics, Woodford Shale, Anadarko Basin, Oklahoma D17
37' 100° 99° 97°

36'

TEXAS

KANSAS 

OKLAHOMA

0 10 20 30 40 50 60 MILES

0 10 20 30 40 50 60 KILOMETERS

Figure 18. Total organic carbon (TOC) of upper member of Woodford Shale; contour interval 1.0 weight percent. TOC is 

calculated from average formation density (see text, equation 1). Areas where upper member is absent are hachured; dots 

show well locations (fig. 1, appendix 1).

D18 Evolution of Sedimentary Basins Anadarko Basin
g

O

D>

w - o q o ~n "° ^ - 2J to

R B w; «~ i (5 U. A* ! * 

» a * n 53 

a

O ?

3 < CD COCO$ JB -, c o

CO (Q 3 ^ 9_= CD CD jg C

~ 6" ^_ (P 3 o ^ O-« IMS'"

3 O' O O- O W 3 ~^ -, 5i'

3 O =± y 

~ Crt ° in 

& « J-- a 8 5-

c < g1 « 3 ® 'w'a C OT 

® 3 o CD C/JCQ -* 

^ I W 3 O

***_ ^S - T-J p* CJ- CD w 0)S.CD ' O -~ 0) JD _| -t. 

O

^ ^ OO (Q

o" _. CD 2. 3 D co r> o

5 o1 Er 55

0) 3. O' CD

- y/ (D ^ (D rv r^* O 

| 1113 3_ CD (Q 3 an3 ^J X «**^ 0) CD - w °3.sB

~ CD C -^ CJ 5' w 

0 CD 3 

O

&£<& s-if ? =?

j* O CO O

8.9-5 3

TOTAL ORGANIC CARBON, IN WEIGHT PERCENT

-I 

o

7sZ m (/) (/)m m

CD CD

^BL ^o > > ' > ' 

i^ >5 > »

> > *%>» D. D.

- ^ fe|^> 0 "> >

>l>> ^ [> [>

> > > I >

> > ^ >

> > » > > >

> **

oo

> cx>

*$ 1ft

> > > 

>

h- > >> o

D> D> 0 0

S(D

ioI

o 

ao"

PERCENT OF OCCURRENCES

 > r-o co -b
fe ° 

w 10 

O 

cc

I 

CD

O 

£ 4

6

O

I 2

CD 

CC. 

O

£ °

P 8

 /> *& &

A A 

AM A

/&AAA ' A 

VA &AA5A AA

UPPER MEMBER

R0>2.0 percent _

A

A 

M

A A 

A A

A A 

A

£ J I A 1

MIDDLE MEMBER

R0>2.0 percent

LOWER MEMBER

R0> 2.0 percent

4 6 8 10 12 14 16 18 20 22 24 26 

DEPTH. IN THOUSANDS OF FEET

Figure 21. Total organic carbon (TOG), calculated from 

average formation density (see text, equation 1), versus burial 

depth for lower, middle, and upper members of Woodford 

Shale. Lines approximate maximum TOG values as a function 

of depth for each member. Data are from well locations of 

figure 1 (tabulated in appendix 2).

D20 Evolution of Sedimentary Basins Anadarko Basin
37' 100° 99° 98° 97°

36'

TEXAS

KANSAS 

OKLAHOMA

10 20 30 40 50 60 MILES

0 10 20 30 40 50 60 KILOMETERS

Figure 22. Mass of organic carbon of Woodford Shale per unit surface area (OC/cm2), calculated using equation 2 (see 

text); contour interval 100 g/cm2 . Area where Woodford Shale is absent is hachured; dots show well locations (fig. 1, 

appendix 1).

Source-Rock Characteristics, Woodford Shale, Anadarko Basin, Oklahoma D21
37' 100° 99° 97°

36'

TEXAS

_ JKANSAS

OKLAHOMA

10 20 30 50 60 MILES

0 10 20 30 40 50 60 KILOMETERS

Figure 23. Mass of organic carbon of lower member of Woodford Shale per unit surface area (OC/cm2), calculated using 

equation 2 (see text); contour interval 50 g/cm2 . Areas where lower member is absent are hachured; dots show well 

locations (fig. 1, appendix 1).

D22 Evolution of Sedimentary Basins Anadarko Basin
100'

36

0 10 20 30 40 50 60 MILES

0 10 20 30 40 50 60 KILOMETERS

Figure 24. Mass of organic carbon of middle member of Woodford Shale per unit surface area (OC/cm2), calculated using 

equation 2 (see text); contour interval 50 g/cm2 . Areas where middle member is absent is hachured; dots show well locations 

(fig. 1, appendix 1).

Source-Rock Characteristics, Woodford Shale, Anadarko Basin, Oklahoma D23
37' 100° 99° 97°

36'

TEXAS

KANSAS

10 20 30 40 50 60 MILES

! I I

0 10 20 30 40 50 60 KILOMETERS

Figure 25. Mass of organic carbon of upper member of Woodford Shale per unit surface area (OC/cm2), calculated using 

equation 2 (see text); contour interval 50 g/cm2 . Areas where upper member is absent are hachured; dots show well 

locations (fig. 1, appendix 1).

D24 Evolution of Sedimentary Basins Anadarko Basin
_

8

LL.

o

LOWER MEMBER 

n=69

20

10

0 50 100 150 200 250 

MASS OF ORGANIC CARBON PER UNIT 

SURFACE AREA, IN g/cm2

Figure 26. Distributions of mass of organic carbon per unit 

surface area (OC/cm2), calculated using equation 2 (see 

text), of lower, middle, and upper members of Woodford 

Shale. Data are from well locations of figure 1 (tabulated in 

appendix 2).

UPPER MEMBER

Southwest, n=30 

Northeast, n=31

MIDDLE MEMBER

Southwest, n= 3 5 

Northeast, n=33

LOWER MEMBER

Southwest, n=28 

Northeast, n= 30

100 150 200 250 300 

MASS OF ORGANIC CARBON PER UNIT 

SURFACE AREA, IN g/cm2

Figure 27. Distributions of mass of organic carbon per unit 

surface area (OC/cm2), calculated using equation 2 (see 

text), of southwest and northeast regions of lower, middle, 

and upper members of Woodford Shale. Data are from well 

locations of figure 1 (tabulated in appendix 2); southwest and 

northeast regions are shown in figure 1.

Table 1 . Mass of organic carbon in lower, middle, and upper members of Woodford Shale in 

study area, Anadarko basin, Oklahoma

19 [In kgxlO Study area is subdivided into northeast and southwest regions by axis of structural feature (fig. 6), and

into zones reflecting stages of hydrocarbon generation according to map of vitrinite reflectance (in percent) (fig. 4)]

Vitrinite reflectance

Upper member 

Middle member

Lower member

Total Woodford Shale

Total 

study area

24 

25

24

73

Region

Southwest

11 

17

18

46

Northeast

13 

8

6

27

<0.6

10 

5

4

19

>0.6<1.3 

(oil window)

5 

7

4

16

>1.3

9 

13

16

38

Source-Rock Characteristics, Woodford Shale, Anadarko Basin, Oklahoma D25
REFERENCES CITED

Amsden, T.W., 1975, Hunton Group (Late Ordovician, Silurian, and Early Devonian) in the Anadarko basin of 

Oklahoma: Oklahoma Geological Survey Bulletin 121, 

214 p.

Cardott, B.J., and Lambert, M.W., 1985, Thermal maturation 

by vitrinite reflectance of Woodford Shale, Anadarko 

basin, Oklahoma: American Association of Petroleum 

Geologists Bulletin, v. 69, no. 11, p. 1982-1998.

Cluff, R.M., 1981, Mudrock fabrics and their significance reply: Journal of Sedimentary Petrology, v. 51, no. 3, p. 

1029-1031.

Ellison, S.P., Jr., 1950, Subsurface Woodford black shale, west 

Texas and southeast New Mexico: University of Texas, 

Bureau of Economic Geology, Report of Investigations 

7, 20 p.

Feinstein, S., 1981, Subsidence and thermal history of southern 

Oklahoma aulacogen: implications for petroleum 

exploration: American Association of Petroleum 

Geologists Bulletin, v. 65, no. 12, p. 2521-2533.

Hashmy, K.H., Hefter, T., and Chicko, R., 1982, Computerized 

shale evaluation technique COMSET: Society of 

Professional Well Log Analysts, 23rd Annual Logging 

Symposium, p. CC1-CC15.

Heckel, P.H., 1972, Recognition of ancient shallow marine 

environments, in Rigby, J.K., and Hamblin, W.K., eds., 

Recognition of ancient sedimentary environments: 

Society of Economic Paleontologists and Mineralogists 

Special Publication 16, p. 226-286.

Hester, T.C., Sahl, H.L., and Schmoker, J.W., 1988, Cross 

sections based on gamma-ray, density, and resistivity logs 

showing stratigraphic units of the Woodford Shale, Anadarko basin, Oklahoma: U.S. Geological Survey 

Miscellaneous Field Studies Map MF-2054, 2 plates.

Hester, T.C., and Schmoker, J.W., 1987, Determination of 

organic content from formation-density logs, DevonianMississippian Woodford Shale, Anadarko basin, 

Oklahoma: U.S. Geological Survey Open-File Report 

87-20, 11 p.

Kelly, T.E., and Merriam, D.F., 1964, Structural development 

of the Sedgwick basin, south-central Kansas: 

Transactions of the Kansas Academy of Science, v. 67, 

no. 1, p. 111-125.

Kinghorn, R.R.F., and Rahman, M., 1983, Specific gravity as a 

kerogen type and maturation indicator with special 

reference to amorphous kerogens: Journal of Petroleum 

Geology, v. 6, no. 2, p. 179-194

Schmoker, J.W., 1979, Determination of organic content of 

Appalachian Devonian shales from formation-density 

logs: American Association of Petroleum Geologists 

Bulletin, v. 63, no. 9, p. 1504-1509.

____ 1980, Organic content of Devonian shale in western 

Appalachian basin: American Association of Petroleum 

Geologists Bulletin, v. 64, no. 12, p. 2156-2165.

1986, Oil generation in the Anadarko basin, Oklahama

and Texas: modeling using Lopatin's method: Oklahoma 

Geological Survey Special Publication 86-3, 40 p.

Schmoker, J.W., and Hester, T.C., 1983, Organic carbon in 

Bakken Formation, United States portion of Williston 

basin: American Association of Petroleum Geologists 

Bulletin, v. 67, no. 12, p. 2165-2174.

Smith, J.W., and Young, N.B., 1964, Specific-gravity to oil-yield 

relationships for black shales of Kentucky's New Albany 

Formation: U.S. Bureau of Mines Report of 

Investigations 6531, 13 p.

Tissot B.P., and Welte, D.H., 1984, Petroleum formation and 

occurrence (2nd ed.): New York, Springer-Verlag, 699 p.

D26 Evolution of Sedimentary Basins Anadarko Basin
Appendixes 1, 2
Appendix 1 . List of wells used in study

[Well numbers shown refer to figure 1 and appendix 2. Location (section, township, and range), operator, and well name

are as shown on well-log headers]

Well 

number

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

Location

Sec. 16, T. 18 N., R. 24 W.

Sec. 24, T. 17 N., R. 24 W.

Sec. 23, T. 17 N., R. 23 W.

Sec. 23, T. 17 N., R. 22 W.

Sec. 29, T. 17 N., R. 21 W.

Sec. 6, T. 16 N., R. 20 W.

Sec. 19, T. 16N..R. 19 W.

Sec. 6, T. 15 N., R. 18 W.

Sec. 29, T. 14N..R. 18W.

Sec. 35, T. 14N..R. 17 W.

Sec. 35, T. 13 N., R. 16 W.

Sec. 14, T. 11N..R. 15 W.

Sec.5,T.22N.,R.23W.

Sec. 18, T. 21 N., R. 22 W.

Sec. 20, T. 21 N., R. 21 W.

Sec.21,T.20N.,R.20W.

Sec. 22, T. 19 N., R. 19 W.

Sec. 20, T. 19 N., R. 17 W.

Sec. 13, T. 18 N., R. 17 W.

Sec. 16, T. 18 N., R. 16 W.

Sec. 19, T. 17 N., R. 14 W.

Sec. 10, T. 16 N., R. 12 W.

Sec. 34, T. 15 N., R. 12 W.

Sec. 8, T. 25 N., R. 21 W.

Sec. 9, T. 25 N., R. 21 W.

Sec. 1, T. 25 N., R. 20 W.

Sec. 28, T. 25 N., R. 19 W.

Sec. 36.T.24N..R. 18W.

Sec. 16, T. 23 N., R. 17 W.

Sec. 25, T. 23 N., R. 17 W.

Sec. 4, T. 22 N., R. 16 W.

Sec. 27, T. 22N..R. 15W.

Sec. ll.T. 21N..R. 14 W.

Sec. 30, T. 21 N., R. 13 W.

Sec. 1,T. 20N..R. 13 W.

Sec. 24, T. 20 N., R. 12 W.

Sec. 35, T. 20N..R. 11 W.

Sec. 12, T. 19N..R. 10 W.

Sec. 11, T. 18N..R.9W.

Sec. 10, T. 18 N., R. 8 W.

Sec. 8, T. 27 N., R. 17 W.

Sec. 19, T. 27N..R. 16 W.

Sec. 21, T. 27N..R. 15W.

Sec. 17, T. 27 N., R. 13 W.

Sec. 22, T. 27 N., R. 12 W.

Sec. 14, T. 27N..R. 11 W.

Sec.20,T.26N.,R. 10 W.

Sec. 21.T.26N..R.9W.

Sec.29,T.26N.,R.8W.

Sec. 7, T. 25 N., R. 6 W.

Operator

Ricks Exploration

Lone Star Production

Energy Reserves Group

Shell Oil

Arkla Exploration

Hoover & Bracken

GettyOil

J C Bames Oil

CFBraun

JMHuberCorp

RodenOil

Helmerich & Payne

Kennedy & Mitchell

Miami Oil Producers Lie

Ramsey Engineering

Superior Oil

Arco Oil & Gas

OFT Exploration Lie

Helmerich & Payne

Texas Oil & Gas

Arkla Exploration

Davis Oil

Coquina Oil

Cobra Oil & Gas

A R Dillard Lie

Woods Petroleum

Mesa Petroleum

Gulf Oil

Hadson Petroleum

Sunmark Exploration

Atlantic Richfield

Mich Wise Pipeline

TennecoOil

Hunt Oil

Anchorage Oil & Gas

French Petroleum

Mineral Resources

Energy Exchange

Energy Reserves Group

An-Son Corp

Shenandoah Oil

Cleary Petroleum Inc

Calvert Mid-America

Texaco Lie

Harper Oil

Michigan Oil

Mack Oil

Anadarko Production

Champlin Petroleum

TXO Production

Well name

16-A Gross

l-24Berryman

1 Eastham

2-23 Kennon

1-29 Harrell

1-6 Anderson

1-19 Hall

1 Cecil Rounds

1-29 Walker

1 Arapaho

35-1 Henry E Nickel

1 Brown Foundation

38-467 Latta

1 Driskell

IMcCaslin

1 Brace Unit

1 Emmett Buck

1-20 Irene Burgess

-13 Taloga Townsite

Dedrick 'B'

-19 Marshall

Pickett

Bah an

Kinney '8'

WRKinney

1 Schaefer

1-28 Janzen

2-36 Gulf -State

1-16 State

1 G A Whitlaw

2 Cora G Case Unit S P

IDyche

1-11 Edwards

1 Voth

1-1 Kay

1-24 Davis

3-A Reames

1 Leisher

2Gerber

1-10 Heller

1 Degeer

1 Davidson

2 Bloyd

1 Stuckey

1 Bouziden

1 Hodgson

1 Sayer

2-21 Tucker 'E'

1 Maxine Garrison

1 Hardiman 'A'

D28 Evolution of Sedimentary Basins Anadarko Basin
Appendix 1. Continued

Well 

number

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

%

97

98

99

Location

Sec. 4, T. 24 N., R. 5 W.

Sec. 21, T. 25N..R.4W.

Sec. 4,T. 16N..R. 26 W.

Sec. 4,T. 19N..R. 23 W.

Sec. 6, T. 20 N., R. 22 W.

Sec. 27, T. 22 N., R. 19 W.

Sec. 26, T. 23N..R. 18W.

Sec. 7, T. 23 N., R. 16 W.

Sec. 35, T. 24N..R. 16 W.

Sec. 1,T. 24N..R. 16 W.

Sec. 26, T. 25N..R. 15W.

Sec. 6, T. 25 N., R. 14 W.

Sec. 19.T.26N..R. 13W.

Sec. 23, T. 28N..R. 13 W.

Sec. 32, T. 11N..R.25W.

Sec. 9,T. 13N..R. 25 W.

Sec. 27, T. 14N..R.24W.

Sec. 27, T. 14 N., R. 23 W.

Sec. 8,T. 15N..R. 22 W.

Sec. 17, T. 16N..R.21 W.

Sec. 1, T. 17 N., R. 19 W.

Sec. 34, T. 18N..R. 18W.

Sec. 17, T. 20 N., R. 16 W.

Sec. 16, T. 20N..R. 16W.

Sec. 1, T. 20 N., R. 16 W.

Sec. 5, T. 20 N., R. 15 W.

Sec. 1.T.20N..R. 15 W.

Sec. 3, T. 21 N., R. 13 W.

Sec. 3, T. 22 N., R. 12 W.

Sec. 1, T. 23 N., R. 12 W.

Sec. 27, T. 24N.,R. 11W.

Sec. 19, T. 24 N., R. 10 W.

Sec. 33, T. 25 N., R. 10 W.

Sec. 12, T. 25N..R. 11 W.

Sec. 21.T.26N..R. 11 W.

Sec. 20, T. 28 N., R. 10 W.

Sec. 27, T. 29N..R. 11 W.

Sec. 21, T. 13N..R. 18W.

Sec.5,T. 14N..R. 16 W.

Sec. 10, T. 15N..R. 16 W.

Sec. 25, T. 18N..R. 11 W.

Sec. 33, T. 20 N., R. 9 W.

Sec. 7, T. 20 N., R. 8 W.

Sec. 6, T. 21 N., R. 8 W.

Sec. 16, T. 22 N., R. 8 W.

Sec. 8, T. 23 N., R. 7 W.

Sec. 8, T. 25 N., R. 5 W.

Sec. 5, T. 26 N., R. 5 W.

Sec. 6, T. 27 N., R. 4 W.

Operator

Bogert Oil

Worrall Engineering

Hoover & Bracken Inc

Ricks Exploration

Anadarko Land & Expl

Woods Petroleum

Apache Corp

Don Leeman

Clifford Resources

Natol-Kirkpatrick Oil

Amerada Petroleum

Calvert Funds Inc

Search Drilling

Damson Oil

Mesa Petroleum

El Paso Natural Gas

Tenneco Oil

El Paso Natural Gas

Clark -Canadian et al

Arkla Exploration et al

Exxon Corp

Dyco Petroleum

Southland Royalty

Reading & Bates et al

Texas Oil & Gas

Pioneer Production

Southport Exploration

Viersen & Cochran

MWJ

Vaughn Good

Vaughn Good

Rachalk Production

California Time Petroleum

Anadarko Productio

J M Huber Corp

Fuel Exploration

Conoco Inc

Arkla Exploration et al

Mcculloch Oil

Southern Union Prod

Seneca Oil

Rodman Corp

Thetis Energy

Harper Oil

Atlantic Richfield

Davis Oil

C E Dinsmore

Conoco Inc

Indian Wells

Well name

IDuffy

1 Mary Balzer

1-4 Cecil

4-A Eddie Max

1-6 Hamilton

1 Peach

1 Garvie Unit

1 W B Johnson

l-35Bouma

1 Tissue

Beard Estate

Wenzel

-19 Kirmse

Lee

-32 Crook

1 Pierce

l-27MCBradshaw

1 Maddux

1 Vierson

l-17Harrell

1 Sabine

1-34 Gore

1-17 England

1 Louthan

1-BJellison

1 -5 Rumsey

1 Mungold

1-3 Penner

IKelln

2Singree

1 Dupus A

1 Thomas

1 Ray Hartman

2-12NewlinA

1 Cherokee Methodist Church

1 Clark -Waggoner

27-1 Hadwiger

1 Beauchamp

l-5Schimmer

1 Jones Droke

l-25Meier

1-33 Maggie Malone

7-3 Montcastle

3 Munkres

2 State Of Oklahoma

1 Riff el

l-8Fothergill

5-2 Conoco

1-6-1 A Hein

Source-Rock Characteristics, Woodford Shale, Anadarko Basin, Oklahoma D29
Appendix 2. Tabulation of data

[Leaders (--) indicate no data available. Well number refers to figure 1 and appendix 1; member refers to

informally named members of the Woodford Shale and to total Woodford Shale; depth is burial depth (in feet)

o

to top of member; DZ is thickness of unit (in feet); pj, is average formation density (g/cm0) from wire-line logs;

TOC is total organic carbon (in weight percent) calculated from average formation density (see text, equation f\ 

1); OC/cm^ is mass of organic carbon per unit surface area calculated using equation 2 (see text); RQ is vitrinite

reflectance (in percent) of Woodford Shale]

Well 

number

1

2

3

4

5

6

7

8

9

10

11

Member

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Depth

15,530

15,534

15,544

16,596

16,602

16,612

16,390

16,394

16,406

16,228

16,238

16,254

16,238

16,242

16,262

16,686

16,690

16,716

16,614

16,622

16,660

15,222

15,238

15,284

18,670

18,690

18,750

17,374

17,410

17,470

18,024

18,072

18,140

DZ

4

10

48

62

6

10

68

84

4

12

48

64

10

16

6

32

4

20

28

52

4

26

16

46

8

38

32

78

16

46

30

92

20

60

44

124

36

60

44

140

48

68

64

180

Pb

2.65

2.59

2.65

2.64

2.54

2.48

2.58

2.57

2.50

--

-

2.65

2.54

2.63

2.59

..

2.53

-

-

2.70

2.57

2.60

2.59

2.61

2.52

2.57

2.55

2.61

2.56

2.62

2.59

2.62

2.55

2.60

2.58

2.60

2.54

2.57

2.56

2.67

2.57

2.59

2.60

TOC

0.96

2.33

0.96

1.18

3.52

5.02

2.56

2.92

..

4.51

--

-

0.96

3.52

1.41

2.32

-.

3.77

-

0.14

2.80

2.10

2.31

1.86

4.01

2.80

3.29

1.86

3.04

1.63

2.38

1.63

3.28

2.10

2.60

2.10

3.52

2.80

2.93

0.51

2.80

2.33

2.02

OC/cm2

3.09

18.38

37.09

58.56

16.36

37.92

137.09

191.37

-.

41.24

-

--

7.73

43.62

6.77

58.12

..

58.08

--

-

0.00

57.03

26.57

83.60

11.87

117.10

70.20

199.17

23.73

109.08

39.17

171.98

26.11

152.93

73.07

252.11

59.79

163.59

96.52

319.90

20.04

149.17

117.66

286.87

RO

1.52

2.00

2.00

2.00

2.00

2.00

2.00

2.00

2.00

2.00

2.00

D30 Evolution of Sedimentary Basins Anadarko Basin
Appendix 2. Continued

Well 

number

12

13

14

15

16

17

18

19

20

21

22

23

Member

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Depth

19,672

19,734

19,810

10,806

-

12,234

12,242

12,250

12,178

12,188

12,202

12,226

12,231

--

12,868

12,872

12,896

11,924

11,932

11,958

12,012

12,020

12,056

1 1,708

11,728

11,755

11,780

11,820

11,853

11,112

11,136

11,150

12,718

12,738

12,752

DZ

62

76

154

292

8

-

8

8

8

4

20

10

14

8

32

5

13

-

18

4

24

48

76

8

26

24

58

8

36

54

98

20

27

55

102

40

33

23

96

24

14

38

76

20

14

62

96

Pb

2.54

2.52

2.60

2.57

2.53

-

2.53

2.69

2.54

2.57

2.61

2.67

2.53

2.62

2.60

2.63

2.50

-

2.54

2.56

2.50

2.51

2.51

2.52

2.53

2.56

2.54

2.63

2.48

2.52

2.51

2.47

2.42

2.52

2.48

2.60

2.53

2.57

2.57

2.43

2.43

2.48

2.46

2.49

2.45

2.46

2.46

TOC

3.52

4.01

2.10

2.90

3.77

-

3.77

0.08

3.52

2.80

2.00

0.51

3.77

1.63

2.22

1.41

4.51

-

3.65

3.04

4.51

4.26

4.27

4.01

3.77

3.04

3.50

1.41

5.02

4.01

4.17

5.27

6.59

4.01

4.94

2.10

3.77

2.80

2.84

6.32

6.32

5.02

5.67

4.76

5.79

5.53

5.39

OC/cm2

169.04

234.21

255.76

659.01

23.23

-

23.23

0.50

21.81

8.77

31.08

4.18

40.66

10.44

55.28

5.64

44.68

-

50.32

9.48

82.49

156.45

248.42

24.65

75.51

56.91

157.07

9.02

136.52

166.41

311.95

79.40

131.16

169.49

380.05

66.43

95.83

50.45

212.71

112.33

65.52

144.10

321.95

72.29

60.55

257.14

389.98

RO

2.00

1.09

1.23

1.20

1.19

1.14

1.02

1.14

1.16

1.29

1.09

1.38

Source-Rock Characteristics, Woodford Shale, Anadarko Basin, Oklahoma D31
Appendix 2. Continued

Well 

number

24

25

26

27

28

29

30

31

32

33

34

35

Member

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Depth

8,438

-

8,510

8,128

8,382

8,124

8,134

-

8,454

8,464

8,476

8,554

8,578

8,590

8,330

8,358

8,600

8,634

8,465

8,502

-

8,666

8,704

8,714

8,792

8,812

8,826

DZ

2

~

2

30

-

30

6

6

8

8

10

8

-

18

10

12

12

34

24

12

60

96

28

12

-

40

34

16

50

37

12

-

49

38

10

4

52

20

14

6

40

Pb

-

-

--

2.65

2.65

2.65

-

-

2.65

2.60

2.60

2.57

2.51

-

2.54

2.60

2.48

2.65

2.58

2.61

2.50

--

2.62

2.44

-

2.57

2.52

2.39

2.48

2.60

2.45

2.56

2.58

2.42

--

-

2.57

2.47

--

TOC

-

-

0.96

-

0.96

0.%

0.%

2.10

~

2.10

2.80

4.26

-

3.45

2.10

6.32

0.96

2.73

1.86

4.51

--

--

1.63

6.05

-

2.96

4.01

7.40

5.09

2.10

5.79

3.00

2.56

6.59

-

-

2.80

5.27

--

OC/cm2

-

~

--

23.18

23.18

4.64

-

-

4.64

13.29

13.29

21.94

26.07

«

48.01

16.61

45.51

9.27

71.39

35.60

41.24

-

36.56

54.03

90.59

104.78

86.25

-

191.03

61.45

51.90

-

113.35

76.61

48.58

-

--

43.87

55.58

--

RO

0.79

0.78

0.73

0.74

0.71

0.70

0.70

0.70

0.71

0.84

0.90

0.87

D32 Evolution of Sedimentary Basins Anadarko Basin
Appendix 2. Continued

Well 

number

36

37

38

39

40

41

42

43

44

45

46

47

Member

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Depth

8,620

8,638

8,652

8,538

8,554

8,570

8,344

8,354

~

8,504

8,514

8,172

8,182

-

6,470

6,518

6,520

6,544

6,580

6,590

6,156

6,196

6,206

5,750

5,814

5,828

5,788

5,874

5,888

5,656

5,736

5,746

5,940

6,016

6,024

DZ

18

14

6

38

16

16

4

36

10

16

26

10

18

-

28

10

14

-

24

48

2

10

60

36

10

4

50

40

10

4

54

64

14

20

98

86

14

32

132

80

10

26

116

76

8

6

90

Pb

2.57

--

2.59

-

2.59

2.47

2.63

2.54

2.56

2.46

2.50

2.62

2.45

-

2.51

2.58

2.43

-

2.49

2.64

2.55

2.62

2.63

2.62

2.42

2.64

2.58

2.58

2.42

2.60

2.55

2.39

2.53

--

2.59

2.40

2.52

2.55

2.53

2.37

2.51

2.51

2.57

2.38

2.55

2.55

TOC

2.80

--

2.33

--

2.33

5.27

1.41

3.53

3.04

5.53

4.57

1.63

5.79

4.30

2.56

6.32

-

4.75

1.18

3.28

1.63

1.33

1.63

6.59

1.18

2.59

2.56

6.59

2.10

3.27

7.40

3.77

-

2.33

7.13

4.01

3.25

3.77

7.95

4.26

4.24

2.80

7.68

3.28

3.27

OC/cm2

39.49

--

11.03

-

29.41

63.52

4.51

97.44

23.71

66.36

90.07

13.06

77.85

90.91

20.16

65.52

-

85.68

45.62

5.10

13.06

63.78

47.00

48.58

3.80

99.38

80.64

48.58

6.64

135.86

75.47

58.08

-

158.10

72.98

98.61

329.69

232.33

57.46

84.74

374.53

166.72

44.55

15.29

226.56

RO

0.83

0.77

0.73

0.71

0.66

0.58

0.57

0.55

0.52

0.53

0.51

0.52

Source-Rock Characteristics, Woodford Shale, Anadarko Basin, Oklahoma D33
Appendix 2. Continued

Well 

number

48

49

50

51

52

53

54

55

56

57

58

59

Member

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Depth

5,986

6,062

6,070

5,952

6,022

6,032

6,100

6,152

6,172

6,204

6,242

6,255

5,886

5,926

5,940

..

17,844

17,866

13,610

13,614

13,620

_.

13,054

13,070

9,876

8,804

8,808

8,040

8,082

8,106

7,710

7,748

-

DZ

76

8

10

94

70

10

20

100

52

20

28

100

38

13

21

72

40

14

10

64

22

14

36

4

6

10

20

16

4

20

8

8

4

12

16

42

24

16

82

38

24

~

62

Pb

2.57

2.38

2.52

2.55

2.52

2.38

2.50

2.50

2.54

2.40

2.55

2.51

2.50

2.40

2.53

2.49

2.57

2.47

2.58

2.55

2.56

2.65

2.60

2.71

2.55

2.63

2.62

2.48

2.50

2.48

2.48

-

2.48

2.69

2.46

-

2.52

2.62

2.46

2.68

2.58

2.60

2.43

-

2.53

TOC

2.80

7.68

4.01

3.34

4.01

7.68

4.51

4.48

3.52

7.13

3.28

4.17

4.51

7.13

3.77

4.77

2.80

5.27

3.77

3.49

3.04

0.96

2.23

0.00

3.28

1.41

1.69

5.02

4.51

4.92

5.02

-

5.02

0.08

5.53

4.17

1.63

5.53

0.29

2.51

2.10

6.32

-

3.73

OC/cm2

166.72

44.55

30.82

242.09

215.72

55.68

68.74

340.14

141.78

104.26

71.37

317.41

130.60

67.77

60.69

259.06

87.75

55.58

20.16

163.49

52.17

10.82

62.99

00.00

15.29

11.28

26.57

60.67

13.75

74.42

30.34

-

30.34

0.25

49.77

-

50.02

54.83

99.54

3.84

158.21

63.11

112.33

175.44

RO

0.46

0.41

--

~

1.80

1.42

1.31

0.89

0.76

0.68

0.64

D34 Evolution of Sedimentary Basins Anadarko Basin
Appendix 2. Continued

Well 

number

60

61

62

63

64

65

66

67

68

69

70

71

Member

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Depth

7,362

7,406

7,422

7,144

7,198

7,214

6,724

6,772

6,787

6,400

6,450

6,462

5,432

5,510

5,518

24,490

24,548

24,574

22,400

22,436

22,468

20,890

20,930

20,964

21,274

21,314

21,356

18,738

18,750

18,780

17,286

17,314

14,256

14,264

14,292

DZ

44

16

18

78

54

16

24

94

48

15

21

84

50

12

34

96

78

8

16

102

58

26

124

208

36

32

82

150

40

34

52

126

40

42

40

122

12

30

54

96

28

20

48

8

28

24

60

Pb

2.57

2.40

2.41

2.50

2.61

2.40

2.46

2.54

2.59

2.46

2.54

2.55

2.54

2.42

2.52

2.52

2.58

2.35

2.53

2.55

2.56

2.50

2.53

2.53

2.58

2.51

2.60

2.58

2.58

2.52

2.57

2.56

2.61

2.54

2.60

2.58

2.60

2.52

-

--

--

-

-

2.55

2.52

2.58

2.55

TOC

2.80

7.13

6.85

4.62

1.86

7.13

5.53

3.69

2.33

5.53

3.52

3.20

3.52

6.59

4.01

4.08

2.56

8.52

3.77

3.22

3.04

4.51

3.77

3.66

2.56

4.26

2.10

2.67

2.56

4.01

2.80

3.05

1.86

3.52

2.10

2.51

2.10

4.01

--

--

--

-

--

3.28

4.01

2.56

3.33

OC/cm2

96.52

83.41

90.64

270.57

80.09

83.41

99.54

263.04

88.24

62.21

57.26

207.71

136.32

58.29

104.78

299.39

157.25

48.81

46.47

252.53

137.53

89.36

360.11

587.00

12.58

104.30

136.19

253.07

80.64

104.78

114.07

299.49

59.33

114.51

66.43

240.27

19.93

92.45

--

--

--

~

--

20.39

86.29

48.38

155.06

RO

0.61

0.59

0.57

0.54

0.50

2.00

2.00

2.00

2.00

2.00

2.00

1.35

Source-Rock Characteristics, Woodford Shale, Anadarko Basin, Oklahoma D35
Appendix 2. Continued

Well 

number

72

73

74

75

76

77

78

79

80

81

82

83

Member

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Depth

13,468

13,478

-

10,300

10,310

10,330

10,314

10,334

10,350

9,870

9,898

9,910

9,792

9,824

9,835

9,514

9,544

8,218

8,254

8,270

7,552

7,580

7,604

7,248

7,274

7,300

7,126

7,144

7,170

7,060

7,070

7,100

6,680

6,716

6,730

DZ

10

16

-

26

10

20

18

48

20

16

96

132

28

12

20

60

32

11

35

78

30

14

-

44

36

16

6

58

28

24

36

88

26

26

48

100

18

26

46

90

10

30

36

76

36

14

18

68

Pb

2.52

2.50

2.51

2.43

2.37

2.45

2.41

2.58

2.43

2.59

2.57

. 2.58

2.42

2.55

2.54

2.54

2.40

2.52

2.51

2.47

2.43

-

2.46

2.59

2.50

2.59

2.57

2.58

2.44

2.57

2.54

2.38

2.48

--

2.48

2.36

2.45

2.43

2.53

2.41

2.51

2.47

2.56

2.43

2.54

2.53

TOC

4.01

4.51

-

4.32

6.32

7.95

5.79

6.80

156

6.32

2.33

2.85

2.56

6.59

3.28

3.61

3.52

7.13

4.01

4.25

5.27

6.32

5.60

2.33

4.51

2.33

193

156

6.05

2.80

3.61

7.68

5.02

~

5.02

8.23

5.79

6.34

3.77

6.85

4.26

5.22

3.04

6.32

3.52

3.84

00cm2

30.82

54.99

85.81

46.80

114.92

77.85

239.57

40.32

74.88

176.49

291.69

56.45

58.29

50.98

165.72

87.25

57.34

107.86

252.45

119.09

65.52

-

184.61

66.18

54.99

11.03

132.20

56.45

108.06

78.97

243.48

_

144.78

182.02

~

68.26

154.01

198.95

421.22

29.04

151.06

117.34

297.44

85.36

65.52

49.08

199.96

RO

1.23

0.90

0.89

0.85

0.85

0.87

0.84

0.74

0.69

0.63

0.59

0.55

D36 Evolution of Sedimentary Basins Anadarko Basin
Appendix 2. Continued

Well 

number

84

85

86

87

88

89

90

91

92

93

94

95

Member

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Depth

6,236

6,284

-

5,990

6,064

6,078

5,386

5,474

5,480

5,214

5,302

5,308

20,106

20,122

20,178

15,634

15,660

15,712

14,506

14,542

14,580

9,370

9,396

9,414

8,100

8,110

7,934

7,946

7,970

7,448

7,468

7,492

7,166

7,214

7,234

DZ

48

16

-

64

74

14

10

98

88

6

30

124

88

6

22

116

16

56

22

94

26

52

32

110

36

38

20

94

26

18

14

58

10

16

26

12

24

30

66

20

24

24

68

48

20

20

88

Pb

2.56

2.38

-

2.52

2.60

2.42

2.56

2.57

2.54

2.37

2.52

2.53

2.57

2.33

2.55

2.55

2.58

2.55

-

-

2.55

2.48

-

--

2.53

2.51

2.54

2.52

2.55

2.48

2.56

2.53

2.58

2.50

2.53

._

2.41

2.42

--

2.52

2.43

2.48

2.47

2.53

2.43

2.52

2.51

TOC

3.04

7.68

-

4.20

2.10

6.59

3.04

2.84

3.52'

7.95

4.01

3.85

2.80

9.09

3.28

3.22

2.56

3.28

--

--

3.28

5.02

-

-

3.77

4.26

3.52

3.91

3.28

5.02

3.04

3.76

2.56

4.51

3.76

..

6.85

6.59

-

4.01

6.32

5.02

5.18

3.77

6.32

4.01

4.40

OC/cm2

113.82

89.09

-

202.91

122.90

68.01

23.71

214.62

239.93

34.48

92.45

366.86

193.04

38.74

56.07

287.85

32.26

142.74

-

--

66.27

197.19

--

--

104.55

123.85

54.53

282.93

66.27

68.26

33.20

167.73

20.16

54.99

75.15

120.85

145.73

-

61.63

112.33

91.01

264.97

139.40

93.60

61.63

294.63

RO

0.57

0.56

0.49

0.48

2.00

1.80

1.47

0.84

0.67

0.60

0.55

0.51

Source-Rock Characteristics, Woodford Shale, Anadarko Basin, Oklahoma D37
Appendix 2. Continued

Well 

number

96

97

98

99

Member

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Upper

Middle

Lower

Total

Depth

6,866

6,910

6,926

5,892

5,954

5,964

5,564

5,620

5,630

5,352

5,402

DZ

44

16

16

76

62

10

22

94

56

10

14

80

50

12

62

Pb

2.57

2.46

2.55

2.54

2.55

2.45

2.55

2.54

2.56

2.47

2.55

2.55

2.56

2.52

2.55

TOC

2.80

5.53

3.28

3.48

3.28

5.79

3.28

3.55

3.04

5.27

3.28

3.36

3.04

4.01

-

3.23

OC/cm2 R0

96.52

66.36

40.78

203.66 0.43

158.03

43.25

56.07

257.35

132.79

39.70

35.68

208.17

118.56

36.98

--

155.54

* U.S GPO: 1990 773-047/06036

D38 Evolution of Sedimentary Basins Anadarko Basin


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