Expelling of hydrocarbon in undercompacted oil-source rocks

Conference · Mon Aug 01 00:00:00 EDT 1994 · AAPG Bulletin (American Association of Petroleum Geologists); (United States)

OSTI ID:6750266

Zhou, Guojun ^[1]; Chen, Fajing ^[2]

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1. West Virgina Univ., Morgantown, WV (United States)
2. China Univ. of Geosciences, Beijing (China)

The clay of source rocks below a certain depth is generally undercompacted. Historical analysis of undercompacted EK2 mudstone in the Huang Hua depression, North China basin, has shown that the peak of the undercompacted zone decreases under a certain depth, mainly due to development of a microfracture caused by abnormally high pressure. Based on the compaction history of mudstones and the hydraulic fracturing condition in this area, the depth of the microfracture developed in the EK2 undercompacted zone is calculated at 2900 m, which is also verified by fluorescence data. Geochemical evidence has also shown that many hydrocarbons are expelled under 2900 m.

• OSTI ID: 6750266
• Report Number(s): CONF-940988-; CODEN: AABUD2
• Journal Information: AAPG Bulletin (American Association of Petroleum Geologists); (United States), Vol. 78:8; Conference: Annual meeting of the Eastern Section of the American Association of Petroleum Geologists (AAPG), East Lansing, MI (United States), 18-21 Sep 1994; ISSN 0149-1423
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
CHINA
PETROLEUM DEPOSITS
CLAYS
COMPACTIFICATION
SOURCE ROCKS
FRACTURING
ASIA
GEOLOGIC DEPOSITS
MINERAL RESOURCES
RESOURCES
020200* - Petroleum- Reserves
Geology
& Exploration