Page 15 - Petroleum Geology

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Summary .................................................. 303
Observations ............................................... 303
Interpretation of observations .................................... 306
The nature of the transition zone .................................. 310
Discussion ............................................... 313
Other possible causes of abnormal pressures ........................... 318
Reservoir geometry ......................................... 318
Clay-mineral diagenesis ....................................... 318
Tectonic ................................................ 319
Osmosis ................................................. 319
Petroleum generation ........................................ 320
References ................................................. 321

CHAPTER 15 . DIAPIRS. DIAPIRISM AND GROWTH STRUCTURES ......... 325
Summary .................................................. 325
Diapirs ................................................... 325
Salt diapirs ............................................... 327
Mudstone (shale) diapirs ...................................... 329
Generalizations ............................................ 330
Diapirism .................................................. 330
Discussion ................................................. 336
Growth structures and incipient diapirism ............................ 340
Gesa anticline, Waropen coast, Irian Jaya ........................... 341
Seria field, Brunei .......................................... 342
Miri field, Sarawak .......................................... 344
References ................................................. 346

CHAPTER 16 . SYNTHESIS ..................................... 349
Summary .................................................. 349
Introduction ................................................ 350
Deformation of sedimentary basins ................................. 351
Regressive sequences .......................................... 352
Rift basins ................................................. 361
References ................................................. 371

APPENDIX 1 . CONSTRUCTION AND USE OF SHALE-TRANSIT-TIME PLOTS . . 375
Operational uses of the method ................................... 378
Geological interpretation ....................................... 378
Example of pressure estimation and interpretation ....................... 380
References ................................................. 381
GLOSSARY ................................................ 383

AUTHORINDEX ............................................ 399
SUBJECT INDEX ............................................ 409