Hydrocarbon charge modeling, Balingian Province, Sarawak, Malaysia
- Sarawak Shell Berhad (Malaysia)
- KSEPL, Rijswijk (Netherlands)
- Petronas Carigali, Kuala Lumpur (Malaysia)
Generation, expulsion, and migration of oil and gas from Tertiary coal beds was modeled for a 2700 km[sup 2] area offshore Sarawak with Shell's integrated basin modeling software. The modeling was undertaken in response to the difficulty of predicting gas:oil, particularly in recent exploration wells. In the Balingian Province, oil and gas are produced from Miocene coastal plain clastics. Although all the hydrocarbons are thought to be sourced from the same type of land plant source rock, the gas:oil ratio varies considerably among the three producing fields and several undeveloped discoveries. Geochemical analyses of source-rock samples and oils strongly indicate that oils in the Balingian Province are sourced by coals and coaly shales found in the Oligocene and early Miocene coastal plain sequences. For these source rocks the main phase of oil generation is in the maturity range 0.8-1.1% VR equivalent. The burial history is well constrained by mapping regionally dated horizons and erosional surfaces. The temperature history suggests that from the late Oligocene to present, the heat flow was basically constant and fairly high due to sustained wrenching.
- OSTI ID:
- 6749870
- Report Number(s):
- CONF-940803--
- Journal Information:
- AAPG Bulletin (American Association of Petroleum Geologists); (United States), Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (United States) Vol. 78:7; ISSN 0149-1423; ISSN AABUD2
- Country of Publication:
- United States
- Language:
- English
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GEOLOGIC DEPOSITS
GEOLOGIC HISTORY
GEOLOGIC MODELS
MALAYSIA
MINERAL RESOURCES
NATURAL GAS DEPOSITS
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