Dynamic Process of Hydrocarbon Accumulation in Low-Exploration Basins:A Case Study of Xihu Depression
Lei Chuang
Ye Jiaren
Wu Jingfu
Shan Chao
Tian Yang
Yin Shiyan
Abstract：This paper re-constructs and analyzes dynamic process of hydrocarbon accumulation in the central part of Xihu depression by using the geological data,geophysical and geochemical techniques of basin modeling in accordance with geological comparison principles. It is found that the depositional filling and tectonic subsidence experienced episodic evolution in study area with its sedimentation thick-ness and subsidence rate reaching the biggest value in Eocene.The organic matter evolution of source rock is characterized by short mat-uration,narrow zone of oil generation and broad zone of gas generation.The main source rock of Pinghu Formation reached oil thresh-old earlier with strong hydrocarbon generation-expulsion capacity,and the generation-expulsion process occurred in early Late Oligocene and Early-Miocene to Mid-Miocene.The petroleum migration and accumulation are controlled by the paleo-structure surface,and the confluence flowing mainly occurs in the Baochu gentle slope zone and Tianping fault steep slope zone while the planar flowing occurs in the central anticline belt.There are several favorable zones of petroleum accumulation in the study area,and the maj or accumulation of oil and gas occurred over the Longj ing movement (7 Ma).
Keywords：dynamic process of hydrocarbon accumulationbasin modelinggeological comparison principlelow-exploration basinpetroleum geologyXihu depression
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：11( 837-847 )