JIANG, JIANQUN, China University of Geosciences, Dept. of Petroleum, Wuhan, China

ABSTRACT: The Organic-fluid Evolution Dynamics, Migration and Entrapment Mechanism in the East Sag of Liaohe Basin, China

The East Sag of Liaohe basin locates in the northeast of China, which is a part of Bohai gulf basinone of the greatest petroleum provinces in China. Its complicated geology condition (a rifty basin developed in Cenozoic experienced early extension and late strike-slip activity) and well-developed volcanic rocks make it a multi-sources, multi-productions, extremely unbalanced distribution petroleum area.

A lot of works have been done on the static elements such as structure, sedimentation and the essential elements of reservoir. Many bore holes, however, turned out to be dry wells while some neighbor bore holes in the similar geology condition are high productive. So the simple static description can't meet the exploration demand. I turn to organic-fluid evolution, migration and accumulation mechanism study based on petroleum system and dynamics of petroleum accumulation theory. This research focuses on the analysis of temperature, pressure, fluid and chemical field based on the source rock determination and conduit net creation. Finally petroleum migration and accumulation model in different geology background is created by static description and dynamic analysis through comprehensively making use of geologic, geophysics, and geochemical data. By this research, the dominated conduit theory of petroleum migration will be advanced and petroleum distribution rule in this rifty basin will be ascertained.

AAPG Search and Discovery Article #90909©2000 AAPG Foundation Grants-in-Aid