Cover image for Introduction to well logs and subsurface maps
Title:
Introduction to well logs and subsurface maps
Personal Author:
Publication Information:
Tulsa, Oklahoma : PennWell Corp., 2008
Physical Description:
xiii, 236 p. : ill. ; 23 cm.
ISBN:
9781593701383

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30000010178972 TN871.35 E94 2008 Open Access Book Book
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30000010254276 TN871.35 E94 2008 Open Access Book Book
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Summary

Summary

Subsurface mapping is a way to visualize various geologic and hydrologic features in any dimension from a 1-D cross section to a 4-D production map. All subsurface map types can be useful, but the key is to know what you are investigating and what map types are most appropriate.

This new book introduces different types of geophysical logs and subsurface maps that can be generated from basic well data, and subsurface problems that can be solved using geophysical logs and subsurface maps. "Hands-on" exercises reveal how each map type is generated and what applications they may have. Exercises at the end of each chapter introduce different types of wells and lithologies.


Table of Contents

List of Figuresp. ix
Acknowledgmentsp. xv
Prefacep. xvii
1 Introduction to Well Logs and Terminologyp. 1
Well Informationp. 2
API Numberingp. 5
State codep. 5
County codep. 6
Well numberp. 6
Sidetrack codep. 7
Event codep. 7
Subsurface Thicknessesp. 8
Exercisesp. 12
Questionsp. 15
2 Basic Well Logs and Log Signaturesp. 17
Basic Well Log Typesp. 17
Gamma Ray (GR)p. 18
Resistivityp. 20
Spontaneous Potential (SP)p. 20
Photoelectric (PE)p. 20
Neutronp. 21
Densityp. 21
Dipmeterp. 22
Caliperp. 22
Sonic (Acoustic)p. 22
Temperaturep. 23
Log Signature Patternsp. 23
Exercisep. 25
Questionsp. 31
3 Introduction to Subsurface Maps and Contouringp. 33
Contouringp. 34
Exercisesp. 37
Questionsp. 40
4 Structural and Stratigraphic Interpretationsp. 41
Picking Methodologyp. 41
Structural Interpretationsp. 43
Stratigraphic Interpretationsp. 45
Exercisesp. 47
Questionsp. 55
5 Structure Contour Mapsp. 57
Exercisesp. 60
Questionsp. 72
6 Thickness Mapsp. 73
Exercisesp. 78
Questionsp. 90
7 Facies Mapsp. 91
Exercisesp. 95
Questionsp. 106
8 Trend Surface Mapsp. 107
Three-Point Problemsp. 119
Exercisesp. 112
Questionsp. 117
9 Trend Surface Residual Anomaly Mapsp. 119
Making a TSRA Mapp. 121
Exercisesp. 124
Questionsp. 136
10 Hydrologic Maps and Injection Wellsp. 137
Hydrologic Mapsp. 137
Injection Wellsp. 140
Exercisesp. 143
Questionsp. 148
11 Formation Fluid Interpretation and Hydrocarbon Reserversp. 149
Water Saturation Calculationsp. 152
Calculating Hydrocarbon Reservesp. 154
Exercisesp. 158
Questionsp. 160
12 Mining Mapsp. 161
Calculating Mining Resources and Reservesp. 163
Exercisep. 165
Questionsp. 167
13 Cross Sectionsp. 169
Cross Section Typesp. 169
Contour slicingp. 172
Vertical exaggerationp. 174
Balanced cross sectionsp. 175
Exercisesp. 178
Questionsp. 184
Appendix Swan Creek Term Projectp. 185
Exercisep. 188
Questionsp. 209
Glossaryp. 211
List of Abbreviationsp. 221
Bibliographyp. 225
Indexp. 227