Significant role of structural fractures in Renqiu buried-hill oil field in eastern China

Journal Article · Wed Aug 01 04:00:00 EDT 1984 · Am. Assoc. Pet. Geol., Bull.; (United States)

OSTI ID:6373940

Qi, Fei; Wang, Xie-Pei

Renqiu oil field is in a buried hill of Sinian (late Precambrian) rocks located in the Jizhong depression of the western Bohai Bay basin in eastern China. The main reservoir consists of Sinian dolomite. The buried hill is a fault block bounded on the west side by a large growth fault that trends north-northeast and has throws of up to 1 km (3,300 ft). The source rocks for the oil are Tertiary sediments that overlie the Sinian dolomite. Structural fractures are the main factor forming the reservoir of the buried-hill oil field. Three dominant structural trends-northeast, north-northeast, and northwest-form the regional fracture system. The fractures are best developed along the north-northeast fault zones and at the intersections of other structural trends. Because the regional stress field altered during the late Mesozoic, the mechanical properties of north-northeast fault zones were changed from compressional shear to extensional shear. Consequently, the enlargement of the structural fractures provided good channels for the circulation of meteoric water.

• Research Organization: Petroleum Geology Section, Beijing Graduate School, Wuhan College of Geology, Beijing
• OSTI ID: 6373940
• Journal Information: Am. Assoc. Pet. Geol., Bull.; (United States), Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States) Vol. 68:8; ISSN AAPGB
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
ALKALINE EARTH METAL COMPOUNDS
ASIA
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
CENOZOIC ERA
CHINA
DOLOMITE
FRACTURED RESERVOIRS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGY
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MECHANICAL PROPERTIES
MINERAL RESOURCES
MINERALS
OIL FIELDS
OXYGEN COMPOUNDS
PETROLEUM DEPOSITS
RESERVOIR ROCK
RESOURCES
SOURCE ROCKS
TERTIARY PERIOD