2009•Tianranqi diqiu kexueRequires access

Development Characteristics of Pearl River Mouth Basin and Its Geological Conditions for Oil and Gas Accumulation

Cui Sha-sha

Abstract

Integrative and multidisciplinary analyses of the development and evolvement and the geologic functions of Pearl River Mouth Basin reveal that it is filled with two types of source rocks that are Eocene Wenchang Formation middle-deep lacustrine facies and Lower Oligocene fluviolacustrine paludal facies. It had Upper Oligocene Zhuhai Formation facies and Middle-Upper Miocene sandstone reservoirs and the associated caprocks at the stage of faulting-depression. A lot of NWW faults caused by intense tectonic and faulting activities not only controlled the tectonic framework of the basin but also supplied tunnels for the deep oil and gas migration and accumulation. It has reservoirs characterized by lower oil generation and upper oil accumulation as well as continent oil generation and marine accumulation.

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Key concepts: Geology, Facies, Structural basin, River mouth, Source rock, Pearl, Tectonics, Stage (stratigraphy)