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GEOREF RECORD

Fractured tight sandstone oil and gas reservoirs; a new play type in the Dongpu Depression, Bohai Bay Basin, China

Zeng Lianbo, Su Hui, Tang Xiaomei, Peng Yongmin and Gong Lei
Fractured tight sandstone oil and gas reservoirs; a new play type in the Dongpu Depression, Bohai Bay Basin, China
AAPG Bulletin (March 2013) 97 (3): 363-377

Abstract

Although conventional reservoirs dominate the Bohai Basin, China, a new type of sandstone reservoir also exists in the Dongpu depression that has a low matrix porosity (tight) in which natural fractures govern both permeability and porosity. These fractured sandstones are located on a structurally modified buried hill underlying Paleogene mudstones, and are truncated along an angular unconformity. The fractured sandstone oils of the Triassic Liujiagou, Heshanggou, and Ermaying Formations are derived from the Paleogene Shahejie Formation, which reached peak oil generation and expulsion during the Oligocene to early Miocene (32.8-15.6 Ma). Gas was generated primarily during the Paleogene from Carboniferous and Permian coals. Petrographic evidence suggests that oil and gas emplacement followed the compaction and cementation of the Triassic sandstone reservoirs. Fluid inclusion evidence and burial history analysis suggest that fractures developed before oil emplacement but may have coincided with peak gas generation, which suggests that oil and gas mainly migrated and accumulated in fractures.


ISSN: 0149-1423
EISSN: 1558-9153
Coden: AABUD2
Serial Title: AAPG Bulletin
Serial Volume: 97
Serial Issue: 3
Title: Fractured tight sandstone oil and gas reservoirs; a new play type in the Dongpu Depression, Bohai Bay Basin, China
Affiliation: China Petroleum University, Laboratory of Petroleum Resource and Prospecting, Beijing, China
Pages: 363-377
Published: 201303
Text Language: English
Publisher: American Association of Petroleum Geologists, Tulsa, OK, United States
References: 50
Accession Number: 2013-030582
Categories: Economic geology, geology of energy sources
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. chart, sect., 4 tables, sketch maps
N38°00'00" - N40°00'00", E117°00'00" - E119°00'00"
Secondary Affiliation: China Petroleum and Chemical Corporation, CHN, ChinaSINOPEC, CHN, China
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by American Association of Petroleum Geologists, Tulsa, OK, United States
Update Code: 201319
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