U.S. Department of the Interior

U.S. Geological Survey

Open-File Report 2020–1126

Structure Contour and Isopach Maps of the Wolfcamp Shale 

and Bone Spring Formation of the Delaware Basin, Permian 

Basin Province, New Mexico and Texas

Structure Contour and Isopach Maps of 

the Wolfcamp Shale and Bone Spring 

Formation of the Delaware Basin, Permian 

Basin Province, New Mexico and Texas

By Stephanie B. Gaswirth

Open-File Report 2020–1126

U.S. Department of the Interior

U.S. Geological Survey
U.S. Department of the Interior

DAVID BERNHARDT, Secretary

U.S. Geological Survey

James F. Reilly II, Director

U.S. Geological Survey, Reston, Virginia: 2020

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Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials 

as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.

Suggested citation:

Gaswirth, S.B., 2020, Structure contour and isopach maps of the Wolfcamp shale and Bone Spring Formation of the 

Delaware Basin, Permian Basin Province, New Mexico and Texas: U.S. Geological Survey Open-File Report 2020–

1126, 37 p., https://doi.org/ 10.3133/ ofr20201126.

ISSN 2331-1258 (online)
iii

Contents

Abstract...........................................................................................................................................................1

Introduction.....................................................................................................................................................1

Geologic Background....................................................................................................................................1

Method Used to Generate Contour Maps .................................................................................................1

References Cited............................................................................................................................................2

Figures .............................................................................................................................................................3

Figures

1. Map showing the Delaware Basin, Permian Basin Province, New Mexico 

and Texas, and the extent of the two Wolfcamp shale continuous gas 

assessment units. ........................................................................................................................4

2. Map showing the Delaware Basin, Permian Basin Province, New Mexico and 

Texas, and the extent of the four Wolfcamp shale continuous oil assessment units .......5

3. Map showing the Delaware Basin, Permian Basin Province, New Mexico 

and Texas, and the extent of the five Bone Spring Formation continuous oil 

assessment units ..........................................................................................................................6

4. Type log from southeast Eddy County, New Mexico, showing the stratigraphic 

column of the Wolfcamp shale and Bone Spring Formation of the Delaware Basin ........7

5. Structure contour map of the top of the Wolfcamp D of the Wolfcamp shale, 

Delaware Basin, Permian Basin Province, New Mexico and Texas ...................................8

6. Structure contour map of the top of the Wolfcamp C of the Wolfcamp shale, 

Delaware Basin, Permian Basin Province, New Mexico and Texas ...................................9

7. Structure contour map of the top of the Wolfcamp B of the Wolfcamp shale, 

Delaware Basin, Permian Basin Province, New Mexico and Texas .................................10

8. Structure contour map of the top of the Wolfcamp A of the Wolfcamp shale, 

Delaware Basin, Permian Basin Province, New Mexico and Texas .................................11

9. Structure contour map of the top of the Third Bone Spring sand interval (Bone 

Spring 3rd sand) of the Bone Spring Formation, Delaware Basin, Permian Basin 

Province, New Mexico and Texas ...........................................................................................12

10. Structure contour map of the top of the Third Bone Spring carbonate interval 

(Bone Spring 3rd Carbonate) of the Bone Spring Formation, Delaware Basin, 

Permian Basin Province, New Mexico and Texas ................................................................13

11. Structure contour map of the top of the Second Bone Spring sand interval 

(Bone Spring 2nd Sand) of the Bone Spring Formation, Delaware Basin, 

Permian Basin Province, New Mexico and Texas ................................................................14

12. Structure contour map of the top of the Second Bone Spring carbonate interval 

(Bone Spring 2nd Carbonate) of the Bone Spring Formation, Delaware Basin, 

Permian Basin Province, New Mexico and Texas ................................................................15

13. Structure contour map of the top of the First Bone Spring shale interval of the 

Bone Spring Formation, Delaware Basin, Permian Basin Province, New Mexico 

and Texas .....................................................................................................................................16

14. Structure contour map of the top of the First Bone Spring sand interval (Bone 

Spring 1st sand) of the Bone Spring Formation, Delaware Basin, Permian Basin 

Province, New Mexico and Texas ...........................................................................................17
iv

15. Structure contour map of the top of the Avalon lower shale interval of the Bone 

Spring Formation, Delaware Basin, Permian Basin Province, New Mexico 

and Texas .....................................................................................................................................18

16. Structure contour map of the top of the Avalon upper shale interval of the Bone 

Spring Formation, Delaware Basin, Permian Basin Province, New Mexico 

and Texas .....................................................................................................................................19

17. Structure contour map of the top of the Leonard shale interval of the Bone 

Spring Formation, Delaware Basin, Permian Basin Province, New Mexico 

and Texas .....................................................................................................................................20

18. Isopach map of the Wolfcamp D, which is the interval from the top of the 

Strawn Formation to the top of the Wolfcamp D of the Wolfcamp shale, 

Delaware Basin, Permian Basin Province, New Mexico and Texas .................................21

19. Isopach map of the Wolfcamp C, which is the interval from the top of the 

Wolfcamp D to the top of the Wolfcamp C of the Wolfcamp shale, Delaware 

Basin, Permian Basin Province, New Mexico and Texas ....................................................22

20. Isopach map of the Wolfcamp B, which is the interval from the top of the 

Wolfcamp C to the top of the Wolfcamp B of the Wolfcamp shale, Delaware 

Basin, Permian Basin Province, New Mexico and Texas ....................................................23

21. Isopach map of the Wolfcamp A, which is the interval from the top of the 

Wolfcamp B to the top of the Wolfcamp A of the Wolfcamp shale, Delaware 

Basin, Permian Basin Province, New Mexico and Texas ....................................................24

22. Isopach map of the Third Bone Spring sand interval (Bone Spring 3rd Sand), 

which is the interval from the top of the Wolfcamp A to the top of the Third 

Bone Spring sand interval of the Bone Spring Formation, Delaware Basin, 

Permian Basin Province, New Mexico and Texas ................................................................25

23. Isopach map of the Third Bone Spring carbonate interval (Bone Spring 3rd 

Carbonate), which is the interval from the top of the Third Bone Spring sand 

interval to the top of the Third Bone Spring carbonate interval of the Bone 

Spring Formation, Delaware Basin, Permian Basin Province, New Mexico 

and Texas .....................................................................................................................................26

24. Isopach map of the Third Bone Spring, which is the interval from the top of 

the Wolfcamp A to the top of the Third Bone Spring carbonate interval of the 

Bone Spring Formation, Delaware Basin, Permian Basin Province, New Mexico 

and Texas .....................................................................................................................................27

25. Isopach map of the Second Bone Spring sand interval, which is the interval 

from the top of the Third Bone Spring carbonate interval to the top of the 

Second Bone Spring sand interval of the Bone Spring Formation, Delaware 

Basin, Permian Basin Province, New Mexico and Texas ....................................................28

26. Isopach map of the Second Bone Spring carbonate interval, which is the 

interval from the top of the Second Bone Spring sand interval to the top of 

the Second Bone Spring carbonate interval of the Bone Spring Formation, 

Delaware Basin, Permian Basin Province, New Mexico and Texas .................................29

27. Isopach map of the Second Bone Spring, which is the interval from the top of 

the Third Bone Spring carbonate interval to the top of the Second Bone Spring 

carbonate interval of the Bone Spring Formation, Delaware Basin, Permian 

Basin Province, New Mexico and Texas ................................................................................30

28. Isopach map of the First Bone Spring shale interval, which is the interval from 

the top of the Second Bone Spring carbonate interval to the top of the First 

Bone Spring shale interval of the Bone Spring Formation, Delaware Basin, 

Permian Basin Province, New Mexico and Texas ................................................................31
v

29. Isopach map of the First Bone Spring sand interval, which is the interval from 

the top of the First Bone Spring shale interval to the top of the First Bone Spring 

sand interval of the Bone Spring Formation, Delaware Basin, Permian Basin 

Province, New Mexico and Texas ...........................................................................................32

30. Isopach map of the First Bone Spring interval, which is the interval from the 

top of the Second Bone Spring carbonate interval to the top of the First Bone 

Spring sand interval of the Bone Spring Formation, Delaware Basin, Permian 

Basin Province, New Mexico and Texas ................................................................................33

31. Isopach map of the Avalon lower shale interval, which is the interval from 

the top of the First Bone Spring sand interval to the top of the Avalon lower 

shale interval of the Bone Spring Formation, Delaware Basin, Permian Basin 

Province, New Mexico and Texas ...........................................................................................34

32. Isopach map of the Avalon upper shale interval, which is the interval from 

the top of the Avalon middle carbonate interval to the top of the Avalon upper 

shale interval of the Bone Spring Formation, Delaware Basin, Permian Basin 

Province, New Mexico and Texas ...........................................................................................35

33. Isopach map of the Leonard shale interval, which is the interval from the top of 

the Avalon upper shale interval to the top of the Leonard shale interval of the 

Bone Spring Formation, Delaware Basin, Permian Basin Province, New Mexico 

and Texas .....................................................................................................................................36

34. Isopach map of the Avalon upper shale interval and the Leonard shale interval, 

which is the interval from the top of the Avalon middle carbonate interval to 

the top of the Leonard shale interval of the Bone Spring Formation, Delaware 

Basin, Permian Basin Province, New Mexico and Texas ....................................................37

Structure Contour and Isopach Maps of the Wolfcamp 

Shale and Bone Spring Formation of the Delaware Basin, 

Permian Basin Province, New Mexico and Texas

By Stephanie B. Gaswirth

Abstract

A series of structure contour and isopach maps for 

the Wolfcamp shale and the Bone Spring Formation of the 

Delaware Basin, Permian Basin Province, were generated in 

support of the U.S. Geological Survey 2018 assessment of 

undiscovered continuous oil and gas resources. The interpreted 

formation tops used to generate the maps are from the IHS 

Markit® PRODFitTM database, a commercial proprietary database. The maps in this report are reflective of the stratigraphic 

units on the IHS Markit type log from southeast Eddy County, 

New Mexico.

Introduction

A series of structure contour and isopach maps for 

the Wolfcamp shale and the Bone Spring Formation of the 

Delaware Basin, Permian Basin Province, were generated 

from the PRODFitTM database (IHS Markit®, 2018). This is 

a proprietary database to which the U.S. Geological Survey 

(USGS) subscribes. These maps were generated in support 

of the USGS 2018 assessment of undiscovered continuous 

oil and gas resources in the Wolfcamp shale and Bone Spring 

Formation (Gaswirth and others, 2018). That study was the 

first USGS assessment of continuous resources for these units 

in the Delaware Basin (figs. 1–3; Gaswirth and others, 2018). 

The structure contour and isopach maps incorporate interpreted formation tops data from PRODFit as of November 1, 

2018 (IHS Markit, 2018). Maps published herein are for the 

intervals that were assessed for oil and gas resources in the 

Delaware Basin by the USGS.

Geologic Background

The USGS National and Global Assessment of Petroleum 

Resources Project completed a geology-based resource assessment of undiscovered, technically recoverable continuous oil 

and gas resources in the Pennsylvanian-Permian Wolfcamp 

shale (informal name; age follows Hamlin and Baumgardner, 

2012) and the early Permian Bone Spring Formation of the 

Delaware Basin in the Permian Basin Province of southeast 

New Mexico and west Texas (Gaswirth and others, 2018). The 

Delaware Basin is the western subbasin of the Permian Basin 

Province and is separated from the Midland Basin to the east 

by the uplifted Central Basin Platform.

PRODFit subdivides both the Wolfcamp shale and the 

Bone Spring Formation into stratigraphic units based on petrophysical log signatures and landing zones for horizontal wells. 

The maps in this publication are reflective of the stratigraphic 

units on the type log from southeast Eddy County, New 

Mexico, shown in figure 4 (IHS Markit, 2018).

Method Used to Generate Contour 

Maps

Elevation data for the top of the Wolfcamp and Bone 

Spring horizons, as defined in figures 5–34, were obtained 

from PRODFit (IHS Markit, 2018). In the database, records 

for 15,052 wells in the Delaware Basin contain depth to the 

top of the Wolfcamp and Bone Spring units; however, the 

number of data points available varied for each of the surfaces 

mapped. Data points were put into ArcGIS and contoured 

using the Kriging contour method for the structure contour 

maps and the isopach maps. Data points are not shown on 

the maps because of the proprietary nature of the IHS Markit 

PRODFit database. Contour maps were clipped to the extent 

of the data points that were used to create the contour lines. 

Isopach thickness maps for the units of the Wolfcamp shale 

and Bone Spring were calculated using elevation data from the 

tops of units. Fewer data points were available for the isopach 

maps because data points from two surfaces were necessary to 

calculate unit thickness.
References Cited

Gaswirth, S.B., French, K.L., Pitman, J.K., Marra, K.R., 

Mercier, T.J., Leathers-Miller, H.M., Schenk, C.J., 

Tennyson, M.E., Woodall, C.A., Brownfield, M.E., Finn, 

T.M., and Le, P.A., 2018, Assessment of undiscovered 

continuous oil and gas resources in the Wolfcamp shale and 

Bone Spring Formation of the Delaware Basin, Permian 

Basin Province, New Mexico and Texas, 2018: U.S. 

Geological Survey Fact Sheet 2018–3073, 4 p. [Also available at https://doi.org/10.3133/fs20183073.]

Hamlin, H.S., and Baumgardner, R.W., Jr., 2012, Wolfberry 

(Wolfcampian-Leonardian) deep-water depositional systems 

in the Midland Basin—Stratigraphy, lithofacies, reservoirs and source rocks: Austin, Tex., The University of 

Texas at Austin, Bureau of Economic Geology, Report of 

Investigations No. 277, 61 p.

IHS Markit®, 2018, PRODFitTM database: Englewood, 

Colo., IHS Markit, accessed November, 1, 2018, at 

https://www.ihsmarkit.com. [Available from IHS Markit, 15 

Inverness Way East, Englewood, CO 80112.]

Klett, T.R., Ahlbrandt, T.S., Schmoker, J.W., and Dolton, 

G.L., 1997, Ranking of the world’s oil and gas provinces 

by known petroleum volumes: U.S. Geological Survey 

Open-File Report 97–463, 1 CD–ROM. [Also available at 

https://pubs.usgs.gov/of/1997/ofr-97-463/97463.html.]

2 Structure Contour and Isopach Maps of the Wolfcamp Shale and Bone Spring Formation
Figures

Figures 3
4 Structure Contour and Isopach Maps of the Wolfcamp Shale and Bone Spring Formation

Base map from U.S. Department of the Interior, National Park Service

D ai blo Platform

Northwest Shelf

Central Basin Platform

NEW MEXICO

TEXAS

YOAKUM

LINCOLN

EDDY LEA

HUDSPETH

GAINES

ECTOR

OTERO

CHAVES

LOVING

CRANE

CULBERSON

TERRY

WARD

WINKLER

JEFF DAVIS

ANDREWS

REEVES

BREWSTER

PECOS

TERRELL

PRESIDIO

UNITED STATES

MEXICO

Permian Basin Province boundary

is shown in plum.

TX

MEXICO

NM

OK

AZ

CO KS

AR

LA

UT MO

GULF OF

MEXICO

Map

area

0 15 30 KILOMETERS

0 15 30 MILES

31°

32°

105°

33°

104° 103°

EXPLANATION

Delaware Basin Wolfcamp C Continuous 

 Gas AU

Permian Basin Province boundary (part)

Delaware Basin Wolfcamp D Continuous 

 Gas AU

UNITED STATES

Figure 1. Map showing the Delaware Basin, Permian Basin Province, New Mexico and Texas, and the extent of the two Wolfcamp 

shale continuous gas assessment units (AUs). Province boundary is from Klett and others, 1997. (From Gaswirth and others, 2018)
Figures 5

Base map from U.S. Department of the Interior, National Park Service

D ai blo Platform

Northwest Shelf

Central Basin Platform

NEW MEXICO

TEXAS

YOAKUM

LINCOLN

EDDY LEA

HUDSPETH

GAINES

ECTOR

OTERO

CHAVES

LOVING

CRANE

CULBERSON

TERRY

WARD

WINKLER

JEFF DAVIS

ANDREWS

REEVES

BREWSTER

PECOS

PRESIDIO

UNITED STATES

MEXICO

TERRELL

31°

32°

105°

33°

104° 103°

EXPLANATION

Delaware Basin Wolfcamp B Lower Continuous 

 Oil AU

Delaware Basin Wolfcamp B Upper Continuous 

 Oil AU

Delaware Basin Wolfcamp C Continuous Oil AU

Permian Basin Province boundary (part)

Delaware Basin Wolfcamp A Continuous Oil AU Permian Basin Province boundary

is shown in plum.

TX

MEXICO

NM

OK

AZ

CO KS

AR

LA

UT MO

GULF OF

MEXICO

Map

area

0 15 30 KILOMETERS

0 15 30 MILES UNITED STATES

Figure 2. Map showing the Delaware Basin, Permian Basin Province, New Mexico and Texas, and the extent of the four Wolfcamp 

shale continuous oil assessment units (AUs). Province boundary is from Klett and others, 1997. (From Gaswirth and others, 2018)
6 Structure Contour and Isopach Maps of the Wolfcamp Shale and Bone Spring Formation

0 15 30 KILOMETERS

0 15 30 MILES

Base map from U.S. Department of the Interior, National Park Service

D ai blo Platform

Northwest Shelf

Central Basin Platform

OCI XE M

WEN

S A

XET YOAKUM

LINCOLN

EDDY LEA

HUDSPETH

GAINES

ECTOR

OTERO

CHAVES

LOVING

CRANE

CULBERSON

TERRY

WARD

WINKLER

JEFF DAVIS

ANDREWS

REEVES

BREWSTER

PECOS

PRESIDIO

UNITED STATES

MEXICO

TERRELL

32°

105°

33°

104° 103°

31°

EXPLANATION

Second Bone Spring Continuous 

 Oil AU

Third Bone Spring Continuous 

 Oil AU

Permian Basin Province 

 boundary (part)

First Bone Spring Continuous 

 Oil AU

Lower Avalon Shale Continuous 

 Oil AU

Upper Avalon Shale Continuous 

 Oil AU

Permian Basin Province boundary

is shown in plum.

TX

MEXICO

NM

OK

AZ

CO KS

AR

LA

UT MO

GULF OF

MEXICO

Map

area

UNITED STATES

Figure 3. Map showing the Delaware Basin, Permian Basin Province, New Mexico and Texas, and the extent of the five Bone Spring 

Formation continuous oil assessment units (AUs). The First, Second, and Third Bone Spring continuous oil AUs have the same extent. 

Province boundary is from Klett and others, 1997. (From Gaswirth and others, 2018)
Figures 7

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

LOVING WINKLER

GAINES

OTERO

HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 10 20 30 40 KILOMETERS

Ross Draw #7

Delaware Basin boundary

Permian Basin boundary (part)

US

MX

RKI Exp Ross Draw #7

36-24S-29E

Eddy Co., NM

30015228100000

Spud 2-25-79

7,500

7,000

8,000

8,500

9,000

9,500

10,000

10,500

11,000

11,500

12,000

12,500

13,000

13,500

14,000

14,500

Log Depth (ft) GR RES

Delaware Mtn. Group

Bone Spring Carbonate

Leonard Shale

Avalon Upper Shale

Avalon Middle Carbonate

Avalon Lower Shale

Bone Spring 1st Sand

First Bone Spring Shale (FBS)

Bone Spring 2nd Carbonate

Bone Spring 2nd Sand

Bone Spring 3rd Carbonate

Bone Spring 3rd Sand

Wolfcamp (aka: Wolfcamp A)

Wolfcamp B

Wolfcamp C

Wolfcamp D

Strawn

Figure 4. Type log from southeast Eddy County, New Mexico, showing the stratigraphic column of the Wolfcamp shale and Bone 

Spring Formation of the Delaware Basin (from IHS Markit®, 2018). Formation and unit tops are based on the PRODFitTM database (IHS 

Markit®, 2018).
8 Structure Contour and Isopach Maps of the Wolfcamp Shale and Bone Spring Formation

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

9,500

9,000

8,500

11,500

11,000

12,000

10,500

10,000

12,500

13,000

13,500

14,000

8,000

15,000

14,500

15,500

7,500

16,000 16,500

16,000

10,500

12,000

11,000 12,000

13,000

11,500

14,500

13,500

12,500 13,000

15,000

10,000

12,500

14,000

14,000

15,500

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 10 20 30 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

12,000

11, 500

10,500

12,500

8,000

MEXICO

11,500

13,500

13,000

7000

UNITED

STATES

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

Figure 5. Structure contour map of the top of the Wolfcamp D of the Wolfcamp shale, Delaware Basin, Permian Basin Province, New 

Mexico and Texas. Contour interval is 500 feet, and 719 data points (wells with Wolfcamp D tops) from PRODFitTM (IHS Markit®, 2018) 

were used to generate the contour map.
Figures 9

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 10 20 30 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

9,500

8,500

9,000

7,000

6,500

11,000

10,500

12,000

12,500

13,000

13,500

13,000

11,000

12,500

6,000

11,500

12,500

11,500

7,500

8,000

10,000

11,500

6,000

5,500

9,000

7,500

12,000

7,000

9,000

9,500

8,500

10,500

10,500

8,000

9,500

10,000

11,000

9,500

8,500

9,500

10,000

6,500

5,500

10,000

Figure 6. Structure contour map of the top of the Wolfcamp C of the Wolfcamp shale, Delaware Basin, Permian Basin Province, New 

Mexico and Texas. Contour interval is 500 feet, and 840 data points (wells with Wolfcamp C tops) from PRODFitTM (IHS Markit®, 2018) 

were used to generate the contour map.
10 Structure Contour and Isopach Maps of the Wolfcamp Shale and Bone Spring Formation

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 10 20 30 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

9,500

9,000

8,500

10,000

10,500

12,000

12,500

7,500

6,000

7,000

6,500

8,000

11,000

7,500

7,000

11,500

6,500

6,000

5,500

5,000

4,500

4,000

9,500

11,000

11,500

9,500

8,000

9,000

8,500

Figure 7. Structure contour map of the top of the Wolfcamp B of the Wolfcamp shale, Delaware Basin, Permian Basin Province, New 

Mexico and Texas. Contour interval is 500 feet, and 846 data points (wells with Wolfcamp B tops) from PRODFitTM (IHS Markit®, 2018) 

were used to generate the contour map.
Figures 11

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 20 30 10 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

9,500

9,000

8,500

8,000

7,000

6,500

10,000

10,500

11,500

11,000

5,500

10,000

6,000

9,000

7,500

6,000

5,500

12,000

12,500

5,000

4,500

4,000

3,500

8,000

8,500

7,500

9,500

8,000

9,000

10,500

8,500

9,000

6,5005,500

7,500

7,000

6,000

Figure 8. Structure contour map of the top of the Wolfcamp A of the Wolfcamp shale, Delaware Basin, Permian Basin Province, 

New Mexico and Texas. Contour interval is 500 feet, and 1,213 data points (wells with Wolfcamp A tops) from PRODFitTM (IHS Markit®, 

2018) were used to generate the contour map.
12 Structure Contour and Isopach Maps of the Wolfcamp Shale and Bone Spring Formation 

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 20 30 10 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

9,000

8,500

8,000

7,500

7,000

6,500

9,500

6,000

5,500

10,000

5,000

4,500

4,000

11,500

10,500

11,000

3,500

12,000

9,500

7,500

3,500

9,000

8,500

7,000

6,500

9,500

8,000

5,500

9,000

8,500

5,000

7,500

7,500

8,000

10,000

8,000

8,500

4,500

9,000

Figure 9. Structure contour map of the top of the Third Bone Spring sand interval (Bone Spring 3rd sand) of the Bone Spring Formation, 

Delaware Basin, Permian Basin Province, New Mexico and Texas. Contour interval is 500 feet, and 7,917 data points (wells with Third 

Bone Spring sand interval tops) from PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
Figures 13

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

105°W 104°W 103°W

32°N

31°N

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

9,000

8,500

8,000

7,500

7,000

6,500

5,500

6,000

5,000

4,500 4,000

9,500

10,000

3,500

10,500

11,000

3,000

2,500

11,500

3,500

7,500

9,500

8,500

7,500

7,000

9,000

9,000

7,000

8,500

6,500

6,500

8,000

10,000

8,000

7,500

6,000

5,500

8,000

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

0 10 20 30

0 20 30 10 40 KILOMETERS

County boundary

State boundary

EXPLANATION

40 MILES

Figure 10. Structure contour map of the top of the Third Bone Spring carbonate interval (Bone Spring 3rd Carbonate) of the Bone 

Spring Formation, Delaware Basin, Permian Basin Province, New Mexico and Texas. Contour interval is 500 feet, and 1,231 data points 

(wells with Third Bone Spring carbonate interval tops) from PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
14 Structure Contour and Isopach Maps of the Wolfcamp Shale and Bone Spring Formation 

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 20 30 10 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

8,000

7,500

7,000

6,500

6,000

10,000

9,500

8,500

10,500

11,000

2,500

8,500

6,500

9,500

3,000

7,500

8,500

9,000

5,500

4,500

5,000

4,5004,000

9,000

3,500

3,000

2,500

8,000

3,000

7,000

8,500

3,500

4,000

3,000

Figure 11. Structure contour map of the top of the Second Bone Spring sand interval (Bone Spring 2nd Sand) of the Bone Spring 

Formation, Delaware Basin, Permian Basin Province, New Mexico and Texas. Contour interval is 500 feet, and 7,963 data points (wells 

with Second Bone Spring sand interval tops) from PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
Figures 15

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 20 30 10 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

7,500

5,000

9,500

9,000

10,500

6,500

8,500

3,000

4,000

2,500

5,500

8,000

8,500

7,500

5,000

9,000

7,000

5,500

4,500

3,500

8,000

8,500

6,500

7,000

6,000

5,500

4,500

10,000

4,000

3,500

3,000

2,500

2,000

5,000

2,500

5,500

7,000

6,000

7,000

8,000

6,500

7,500

6,500

Figure 12. Structure contour map of the top of the Second Bone Spring carbonate interval (Bone Spring 2nd Carbonate) of the Bone 

Spring Formation, Delaware Basin, Permian Basin Province, New Mexico and Texas. Contour interval is 500 feet, and 1,232 data points 

(wells with Second Bone Spring carbonate interval tops) from PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
16 Structure Contour and Isopach Maps of the Wolfcamp Shale and Bone Spring Formation

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 10 20 30 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

7,500

8,000

00 ,0 7

6,500

6,000

5,500

5,000

4,500

3,500

4,000

8,500

9,500

9,000

3,000

2,500

10,000

2,000

10,500

2,500

8,000

3,500

6,000

3,000

7,500

7,000

8,000

8,500

6,500

7,500

9,000

2,500

Figure 13. Structure contour map of the top of the First Bone Spring shale interval of the Bone Spring Formation, Delaware Basin, 

Permian Basin Province, New Mexico and Texas. Contour interval is 500 feet, and 906 data points (wells with First Bone Spring shale 

interval tops) from PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
Figures 17

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 20 30 10 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

8,000

8,500

7,500

9,000

000,7

6,500

6,000

005,9

5,500

5,000

4,500

4,000

10,000

3,500

3,000

2,500

10,500

9,500

7,000

9,000

005,9

5,500

Figure 14. Structure contour map of the top of the First Bone Spring sand interval (Bone Spring 1st sand) of the Bone Spring Formation, 

Delaware Basin, Permian Basin Province, New Mexico and Texas. Contour interval is 500 feet, and 8,021 data points (wells with First 

Bone Spring sand interval tops) from PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
18 Structure Contour and Isopach Maps of the Wolfcamp Shale and Bone Spring Formation

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 10 20 30 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

6,500 7,000

10,000

9,000

6,000

5,500

8,000

7,500

8,500

9,000

9,500

5,500

4,500

6,500

7,000

6,500

4,500

5,000

4,500

4,000

3,500

3,000

2,500

4,000

10,000

8,000

7,500

7,000

Figure 15. Structure contour map of the top of the Avalon lower shale interval of the Bone Spring Formation, Delaware Basin, Permian 

Basin Province, New Mexico and Texas. Contour interval is 500 feet, and 780 data points (wells with Avalon lower shale interval tops) 

from PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
Figures 19

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 10 20 30 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

7,500

7,000

6,500

6,000

8,000

8,500

00 ,5 5

9,000

5,000

4,000

4,500

3,500

3,000

2,500

2,000

1,500

9,500

7,000

7,500

1,500

6,000

8,000

6,500

7,000

5,000

7,000

7,500

8,500

6,500

7,500

5,500

8,000

7,500

Figure 16. Structure contour map of the top of the Avalon upper shale interval of the Bone Spring Formation, Delaware Basin, Permian 

Basin Province, New Mexico and Texas. Contour interval is 500 feet, and 877 data points (wells with Avalon upper shale interval tops) 

from PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
20 Structure Contour and Isopach Maps of the Wolfcamp Shale and Bone Spring Formation 

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 10 20 30 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

6,500

6,000

5,500

5,000

4,500

7,500

7,000

4,000

8,000

3,500

3,000

2,000

2,500

9,000

1,500

9,000

4,500

6,500

4,500

2,000

3,000

4,000

6,500

4,000

8,000

7,500

7,000

6,000

3,500

2,500

7,000 7,500

5,500

Figure 17. Structure contour map of the top of the Leonard shale interval of the Bone Spring Formation, Delaware Basin, Permian 

Basin Province, New Mexico and Texas. Contour interval is 500 feet, and 812 data points (wells with Leonard shale interval tops) from 

PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
Figures 21

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 10 20 30 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

400

300

500

600

800

700

200

900

1,000

1,100

1,200

1,300 1,400

1,000

400

200

500

600

500

900

800

800

400

300

300

700

200

300

300

700

600

600

400

300

200

900

Figure 18. Isopach map of the Wolfcamp D, which is the interval from the top of the Strawn Formation to the top of the Wolfcamp D of 

the Wolfcamp shale, Delaware Basin, Permian Basin Province, New Mexico and Texas. Contour interval is 100 feet, and 686 data points 

(wells with Strawn Formation and Wolfcamp D tops) from PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
22 Structure Contour and Isopach Maps of the Wolfcamp Shale and Bone Spring Formation

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 10 20 30 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

2,000 1,900

1,800

2,100

1,700 1,500

1,300

2,200

2,300

2,400

2,500

2,600

2,700

2,800

2,900

3,000

3,100

3,200

3,300

3,400

3,500

3,600

3,700

3,800

3,900

4,000

4,100

3,100

900

2,700

1,600

1,300

1500

3,000

1,000

1,100

2,100

2,000

2,800

1,700

1,800

2,600

1,400

1,900

1,200

2,900

600

500

700

800

900

1,100

1,600

1,400

1,200

1,000

400

300

200

400

300

300

Figure 19. Isopach map of the Wolfcamp C, which is the interval from the top of the Wolfcamp D to the top of the Wolfcamp C of the 

Wolfcamp shale, Delaware Basin, Permian Basin Province, New Mexico and Texas. Contour interval is 100 feet, and 625 data points 

(wells with Wolfcamp C and D tops) from PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
Figures 23

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 10 20 30 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

500 600 700

800

900

400

300

1,000

1,100

1,200

200

1,300

100

1,400

1,500

1600

1,700

1,800

900

600

500

1,100

900

1,200

700

1,100

500

700

400

200

500

1,100

1,300

1,000

1,500

700

700

1,600

1,200

1,400

300 1,300

800

1,400

400

500

1,400

400

600

500

800

300

600

400

1,300

300

700

700

900

400

1,000

200

800

800

1,000

900

400

1,200

600

200

1,400

Figure 20. Isopach map of the Wolfcamp B, which is the interval from the top of the Wolfcamp C to the top of the Wolfcamp B of the 

Wolfcamp shale, Delaware Basin, Permian Basin Province, New Mexico and Texas. Contour interval is 100 feet, and 680 data points 

(wells with Wolfcamp B and C tops) from PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
24 Structure Contour and Isopach Maps of the Wolfcamp Shale and Bone Spring Formation 

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 10 20 30 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

400

300

500

500

500

400

400

300

300

300

400

400

500

500

Figure 21. Isopach map of the Wolfcamp A, which is the interval from the top of the Wolfcamp B to the top of the Wolfcamp A of the 

Wolfcamp shale, Delaware Basin, Permian Basin Province, New Mexico and Texas. Contour interval is 100 feet, and 846 data points 

(wells with Wolfcamp A and B tops) from PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
Figures 25

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 20 30 10 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

340

300

380

400

420

440

180

160

480

460

280 260

420

320

240

400

360

400

360

260

220

300

300

300

240

200

360

320

280

340

220

200

340

380

240

180

460

280

400

440

240

240

280

260

260

240

320

340

280

260

240

220

340

220

180

290

280 240

260

200

380

380

180

360

360

400

320

340

340

320

420

200

340

240

180

220

240

280

320

300

300

260

200

180

280

340

360

320

Figure 22. Isopach map of the Third Bone Spring sand interval (Bone Spring 3rd Sand), which is the interval from the top of the 

Wolfcamp A to the top of the Third Bone Spring sand interval of the Bone Spring Formation, Delaware Basin, Permian Basin 

Province, New Mexico and Texas. Contour interval is 20 feet, and 1,118 data points (wells with Wolfcamp A and Third Bone Spring 

sand interval tops) PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
26 Structure Contour and Isopach Maps of the Wolfcamp Shale and Bone Spring Formation 

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 20 30 10 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

700

600

500

800

900

400

1,000

1,100

1,200

1,300

300

1,400

1,500

1,600

700

300

800

500

700

800

400

700

600

400

400

Figure 23. Isopach map of the Third Bone Spring carbonate interval (Bone Spring 3rd Carbonate), which is the interval from the top 

of the Third Bone Spring sand interval to the top of the Third Bone Spring carbonate interval of the Bone Spring Formation, Delaware 

Basin, Permian Basin Province, New Mexico and Texas. Contour interval is 100 feet, and 1,181 data points (wells with Third Bone Spring 

sand and Third Bone Spring carbonate tops) from PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
Figures 27

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 20 30 10 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

1,100

1,300

1,600

1,700

1,800

1,900

700

1,700

900

800

1,200

1,000

1,600

500

1,000

1,200

600

1,400

1,500

1,000

900

800

700

500

400

500

800

600

1,000

700

600

1,100

Figure 24. Isopach map of the Third Bone Spring, which is the interval from the top of the Wolfcamp A to the top of the Third Bone 

Spring carbonate interval of the Bone Spring Formation, Delaware Basin, Permian Basin Province, New Mexico and Texas. Contour 

interval is 100 feet, and 1,170 data points (wells with Wolfcamp A and Third Bone Spring carbonate interval tops) from PRODFitTM 

(IHS Markit®, 2018) were used to generate the contour map.
28 Structure Contour and Isopach Maps of the Wolfcamp Shale and Bone Spring Formation

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 20 30 10 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

280

300

260

320

340

360 380

380

240

220

400

200

420

180

440

160

460

480 500

140

520

240

400

380

180

340

480

440

220

280

220

460

260

180

200

340

400

440

360

380

300

180

360

200

380

420

320

180

160

Figure 25. Isopach map of the Second Bone Spring sand interval, which is the interval from the top of the Third Bone Spring carbonate 

interval to the top of the Second Bone Spring sand interval of the Bone Spring Formation, Delaware Basin, Permian Basin Province, 

New Mexico and Texas. Contour interval is 20 feet, and 1,204 data points (wells with Third Bone Spring carbonate interval and Second 

Bone Spring sand interval tops) from PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
Figures 29

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 20 30 10 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

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MEXICO

UNITED

STATES

Figure 26. Isopach map of the Second Bone Spring carbonate interval, which is the interval from the top of the Second Bone Spring 

sand interval to the top of the Second Bone Spring carbonate interval of the Bone Spring Formation, Delaware Basin, Permian Basin 

Province, New Mexico and Texas. Contour interval is 10 feet, and 1,191 data points (wells with Second Bone Spring sand interval and 

Second Bone Spring carbonate interval tops) from PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
30 Structure Contour and Isopach Maps of the Wolfcamp Shale and Bone Spring Formation

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 20 30 10 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

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600

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Figure 27. Isopach map of the Second Bone Spring, which is the interval from the top of the Third Bone Spring carbonate interval to 

the top of the Second Bone Spring carbonate interval of the Bone Spring Formation, Delaware Basin, Permian Basin Province, New 

Mexico and Texas. Contour interval is 20 feet, and 1,176 data points (wells with Third Bone Spring carbonate interval and Second Bone 

Spring carbonate interval tops) from PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
Figures 31

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 20 30 10 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

70

80

30

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Figure 28. Isopach map of the First Bone Spring shale interval, which is the interval from the top of the Second Bone Spring carbonate 

interval to the top of the First Bone Spring shale interval of the Bone Spring Formation, Delaware Basin, Permian Basin Province, New 

Mexico and Texas. Contour interval is 10 feet, and 839 data points (wells with Second Bone Spring carbonate interval and First Bone 

Spring shale interval tops) from PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
32 Structure Contour and Isopach Maps of the Wolfcamp Shale and Bone Spring Formation 

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 20 30 10 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

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Figure 29. Isopach map of the First Bone Spring sand interval, which is the interval from the top of the First Bone Spring shale interval 

to the top of the First Bone Spring sand interval of the Bone Spring Formation, Delaware Basin, Permian Basin Province, New Mexico 

and Texas. Contour interval is 20 feet, and 861 data points (wells with First Bone Spring shale interval and First Bone Spring sand interval 

tops) from PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
Figures 33

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 20 30 10 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

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360

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Figure 30. Isopach map of the First Bone Spring interval, which is the interval from the top of the Second Bone Spring carbonate 

interval to the top of the First Bone Spring sand interval of the Bone Spring Formation, Delaware Basin, Permian Basin Province, New 

Mexico and Texas. Contour interval is 20 feet, and 1,131 data points (wells with Second Bone Spring carbonate interval and First Bone 

Spring sand interval tops) from PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
34 Structure Contour and Isopach Maps of the Wolfcamp Shale and Bone Spring Formation 

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 20 30 10 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

30

40

20

60

50

40

30

40

30

60

Figure 31. Isopach map of the Avalon lower shale interval, which is the interval from the top of the First Bone Spring sand interval to 

the top of the Avalon lower shale interval of the Bone Spring Formation, Delaware Basin, Permian Basin Province, New Mexico and 

Texas. Contour interval is 10 feet, and 669 data points (wells with First Bone Spring sand interval and Avalon lower shale interval tops) 

from PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
Figures 35

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 20 30 10 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

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Figure 32. Isopach map of the Avalon upper shale interval, which is the interval from the top of the Avalon middle carbonate interval 

to the top of the Avalon upper shale interval of the Bone Spring Formation, Delaware Basin, Permian Basin Province, New Mexico and 

Texas. Contour interval is 10 feet, and 797 data points (wells with Avalon middle carbonate interval and Avalon upper shale interval 

tops) from PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
36 Structure Contour and Isopach Maps of the Wolfcamp Shale and Bone Spring Formation 

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON

REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 20 30 10 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

30

40

20

60

50

40

30

40

30

60

Figure 33. Isopach map of the Leonard shale interval, which is the interval from the top of the Avalon upper shale interval to the top 

of the Leonard shale interval of the Bone Spring Formation, Delaware Basin, Permian Basin Province, New Mexico and Texas. 

Contour interval is 10 feet, and 957 data points (wells with Avalon upper shale interval and Leonard shale interval tops) from PRODFitTM 

(IHS Markit®, 2018) were used to generate the contour map.
Figures 37

Map Area

Delaware Basin

TX

MEXICO

NM OK

Province boundary UNITED

STATES

EDDY LEA

CULBERSON REEVES

PECOS

JEFF DAVIS

WARD

WINKLER

LOVING

GAINES

OTERO HUDSPETH

ANDREWS

CHAVES

BREWSTER PRESIDIO

T E X A S

N E W M E X I C O

Extent of data points for contouring

Permian Basin Province boundary (part)

Delaware Basin boundary

105°W 104°W 103°W

32°N

31°N

0 10 20 30 40 MILES

0 20 30 10 40 KILOMETERS

County boundary

State boundary

EXPLANATION

Base map from U.S. Department of the Interior, National Park Service

MEXICO

UNITED

STATES

250

240

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Figure 34. Isopach map of the Avalon upper shale interval and the Leonard shale interval, which is the interval from the top of the 

Avalon middle carbonate interval to the top of the Leonard shale interval of the Bone Spring Formation, Delaware Basin, Permian 

Basin Province, New Mexico and Texas. Contour interval is 10 feet, and 819 data points (wells with Avalon middle carbonate interval 

and Leonard shale interval tops) from PRODFitTM (IHS Markit®, 2018) were used to generate the contour map.
Gaswirth—Structure Contour and Isopach Maps of the Wolfcamp Shale and Bone Spring Formation—Open-File Report 2020–1126

ISSN 2331-1258 (online)

https://doi.org/10.3133/ofr20201126