Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Analysis of overpressure zones at the southern margin of the Baram Delta Province and their implications to hydrocarbon expulsion, migration, and entrapment

Conference · · AAPG Bulletin (American Association of Petroleum Geologists); (United States)
OSTI ID:7016866
; ;  [1]
  1. Idemitsu Oil Exploration Co., Ltd., Sarawak (Malaysia)
+ Show Author Affiliations
The Baram delta oil and gas province covers a major part of the onshore and offshore areas of northern Sarawak, Malaysia, and Brunei. Thick marine to deltaic sediments of late Eocene to Pleistocene age were rapidly deposited in the basin, resulting in widespread abnormal formation pressures. Overpressure zones are normally encountered within thick marine-deposited claystone intervals occurring below and/or just at the basal part of major oil and gas accumulations in the offshore areas of the Baram delta. Because of drilling hazards, the onset of overpressuring is regarded as an arbitrary economic limit for oil exploration. In onshore Sarawak, the southern margin of the Baram delta province contains thick late Eocene to Miocene (Cycle I-V) sediments deposited and uplifted in the latest Pliocene. Abnormal pressure zones have been encountered in three different settings viz.: (1) undercompacted claystone predominant intervals, (2) uplifted reservoir sands with hydrocarbons, and (3) hydrodynamically pressured shallow sand intervals. A unique overpressure zone, which occurs below stacks of hydrostatic and permeable coastal-deltaic sands, has been observed.
OSTI ID:
7016866
Report Number(s):
CONF-940803--
Conference Information:
Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (United States) Journal Volume: 78:7
Country of Publication:
United States
Language:
English

Similar Records

Overpressures in the Baram Field, offshore Sarawak, East Malaysia
Conference · Fri Jul 01 00:00:00 EDT 1994 · AAPG Bulletin (American Association of Petroleum Geologists); (United States) · OSTI ID:6812006
Tectonic evolution of the offshore Sarawak and Sabah Basins, Northwest Borneo
Conference · Fri Jul 01 00:00:00 EDT 1994 · AAPG Bulletin (American Association of Petroleum Geologists); (United States) · OSTI ID:6749916
Hydrocarbon distribution in Tertiary sandstones as a function of formation pressure and temperature
Conference · Tue May 01 00:00:00 EDT 1990 · AAPG Bulletin (American Association of Petroleum Geologists); (USA) · OSTI ID:6677255

Related Subjects

02 PETROLEUM
020200 -- Petroleum-- Reserves
Geology
& Exploration
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
030300 -- Natural Gas-- Drilling
Production
& Processing
ASIA
BRUNEI
DEVELOPING COUNTRIES
DRILLING
GEOLOGIC DEPOSITS
MALAYSIA
MINERAL RESOURCES
NATURAL GAS DEPOSITS
PETROLEUM DEPOSITS
RESERVOIR PRESSURE
RESOURCES
SAFETY
WELL DRILLING