List of Figures ............................................... xiv
List of Plates ............................................... xxix
Preface ...................................................... xxxi
Introduction ............................................... xxxiii
Chapter 1 The Nature of Gas and Oil ............................. 1
Petroleum ....................................................... 1
Chemical Composition ............................................ 1
Crude Oil ....................................................... 2
Natural Gas ..................................................... 8
Reservoir Hydrocarbons ......................................... 13
Chapter 2 The Earth's Crust - Where We Find It ................. 15
Rocks and Minerals ............................................. 15
Types of Rocks ................................................. 16
Structure of the Earth's Crust ................................. 22
Chapter 3 Identification of Common Rocks and Minerals .......... 27
Identification of Minerals ..................................... 27
Minerals ....................................................... 29
Identification of Rocks ........................................ 31
Rocks .......................................................... 31
Chapter 4 Geological Time ...................................... 35
Radioactive Age Dating ........................................ 35
Relative Age Dating ........................................... 38
The Geological Time Scale ..................................... 45
Earth History ................................................. 45
Chapter 5 Deformation of Sedimentary Rocks .................... 49
Weathering, Erosion, and Unconformities ........................ 49
Anticlines and Synclines ....................................... 55
Domes .......................................................... 57
Homoclines ..................................................... 60
Fractures ...................................................... 60
Chapter 5 Sandstone Reservoir Rocks ........................... 73
Dune Sandstones ............................................... 73
Shoreline Sandstones .......................................... 75
River Sandstones .............................................. 78
Delta Sandstones .............................................. 83
Chapter 7 Carbonate Reservoir Rocks ............................ 91
Reefs ......................................................... 91
Limestone Platforms ........................................... 97
Karst Limestone .............................................. 100
Chalk ........................................................ 102
Dolomite ..................................................... 102
Chapter 8 Sedimentary Rock Distribution ...................... 107
Basin Formation .............................................. 107
Sedimentary Rock Facies ...................................... 112
Subsurface Rock Layers ....................................... 114
Chapter 9 Mapping ............................................ 119
Topographic Maps ............................................. 119
Geologic Maps ................................................ 121
Base Maps .................................................... 124
Subsurface Maps .............................................. 124
Chapter 10 Ocean Environment and Plate Tectonics .............. 129
Ocean Topography ............................................. 129
Ocean Sediments .............................................. 136
Earth's Interior ............................................. 136
Continental Drift ............................................ 137
Seafloor Spreading ........................................... 137
Plate Tectonics .............................................. 142
Failed Arm Basins ............................................ 144
Middle East Oil Fields ....................................... 147
Chapter 11 Source Rocks, Generation, Migration,
and Accumulation of Petroleum ...................... 149
Source Rocks ................................................. 149
Generation ................................................... 150
Migration .................................................... 152
Accumulation ................................................. 153
Age .......................................................... 156
Reservoir Rocks .............................................. 156
Saturation ................................................... 163
Oil Shales ................................................... 164
Tar Sands .................................................... 165
Chapter 12 Petroleum Traps .................................... 167
Description .................................................. 167
Structural Traps ............................................. 169
Stratigraphic Traps .......................................... 181
Combination Traps ............................................ 186
Chapter 13 Petroleum Exploration—Geological
and Geochemical ....................................... 195
Seeps ........................................................ 195
Geological Techniques ........................................ 198
Geochemical Techniques ....................................... 206
Plays and Trends ............................................. 207
Chapter 14 Petroleum Exploration—Geophysical .................. 209
Gravity and Magnetic Exploration ............................. 209
Seismic Exploration .......................................... 213
Chapter 15 Drilling Preliminaries ............................. 233
Land and Leasing ............................................. 233
Foreign Contracts ............................................ 235
Authority for Expenditure .................................... 236
Drilling Contracts ........................................... 237
Joint Operating Agreements and Support Agreements ............ 238
Site Preparation ............................................. 239
Types of Wells ............................................... 241
Government Regulations ....................................... 242
Cable Tool Rigs .............................................. 243
Chapter 16 Drilling a Well—the Mechanics ...................... 247
Power ........................................................ 247
Hoisting System .............................................. 250
Rotating System .............................................. 252
Circulating System ........................................... 262
Drilling Operations .......................................... 270
Chapter 17 Drilling Problems .................................. 273
Risk ......................................................... 273
Subsurface Conditions ........................................ 273
Problems while Drilling ...................................... 275
Chapter 18 Drilling Techniques ................................ 285
Straight Hole ................................................ 285
Directional Drilling ......................................... 285
Air and Foam Drilling ........................................ 295
Chapter 19 Testing a Well ..................................... 297
Sample or Lithologic Log ..................................... 297
Drilling Time Log ............................................ 301
Mud Log ...................................................... 302
Wireline Well Logs ........................................... 303
Measurements and Logging-While-Drilling ...................... 328
Drillstem Test ............................................... 330
Repeat Formation Tester ...................................... 332
Chapter 20 Completing a Well .................................. 333
Casing ....................................................... 343
Bottomhole Completions ....................................... 342
Tubing ....................................................... 345
Wellhead ..................................................... 347
Chokes ....................................................... 348
Surface Equipment ............................................ 348
Multiple Completions ......................................... 358
Intelligent Wells ............................................ 360
Chapter 21 Surface Treatment and Storage ...................... 361
Flowlines .................................................... 361
Separators ................................................... 363
Gas Treatment ................................................ 368
Storage and Measurement ...................................... 370
Chapter 22 Offshore Drilling and Production ................... 375
Preliminaries ................................................ 375
Top Drive .................................................... 377
Offshore Crews ............................................... 378
Exploratory Drilling ......................................... 378
Spudding an Offshore Exploratory Well ........................ 383
Developmental Drilling and Production ........................ 385
Subsea Work .................................................. 389
Subsea Completions and Wells ................................. 390
Unstable Sea Bed ............................................. 391
Chapter 23 Workover ........................................... 393
Equipment .................................................... 393
Well Intervention on Offshore Wells .......................... 396
Preparing the Well ........................................... 398
Well Problems ................................................ 398
Chapter 24 Reservoir Mechanics ................................ 405
Reservoir Drives ............................................. 405
Maximum Efficient Rate ....................................... 412
Chapter 25 Petroleum Production ............................... 413
Well and Reservoir Pressures ................................. 413
Well Testing ................................................. 414
Cased-Hole Logs .............................................. 416
Production Logs .............................................. 417
Decline Curves ............................................... 418
Bypassing and Coning ......................................... 420
Cycling ...................................................... 421
Well Stimulation ............................................. 422
Oilfield Brine and Solution Gas Disposal ..................... 426
Surface Subsidence ........................................... 427
Corrosion .................................................... 429
Production Maps .............................................. 429
Stranded Gas ................................................. 430
Chapter 26 Reserves ........................................... 431
Recovery Factor Shrinkage Factor and Formation ............... 431
Volume Factor ................................................ 431
Reserves Calculations ........................................ 434
Types of Reserves ............................................ 438
Chapter 27 Improved Oil Recovery ............................. 439
Waterflood ................................................... 439
Enhanced Oil Recovery ........................................ 443
Efficiency ................................................... 448
Unitization .................................................. 448
Plug and Abandon ............................................. 448
Glossary ..................................................... 451
Figure References ............................................ 551
Unit Conversions ............................................. 557
Oil and Gas Records .......................................... 559
Index ......................................................... 563
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