渤海海域渤中凹陷源控油气作用及有利勘探区域预测

doi:10.11743/ogg20090402

Abstract

Abstract:

According to the geological theory of "source-control" (i.e.,hydrocarbon accumulations are under the control of source rocks),we made geostatistics on distributions of source rocks and reservoirs in China's eastern basins.Based on these statistical data,we brought forward a concept of "hydrocarbon distribution threshold" ,which lays the foundation for concepts such as "probability of hydrocarbon pooling","probability of reserve distribution" and "maximum size of reservoir".A multivariate nonlinear mathematical model was established by using the geostatistics and regression discrimination approaches.We made a comprehensive prediction on the hydrocarbon distribution in the Bozhong depression of the Bohai Sea waters according to the hydrocarbon expulsion threshold,hydrocarbon pooling threshold and hydrocarbon distribution threshold.The results show that,the favorable plays are the Shijiutuo pooling system and the Bodong pooling system.Favorable exploration targets will be traps which are adjacent to the boundary of hydrocarbon expulsion and have an over 80% probability of hydrocarbon pooling.

Key words: hydrocarbon expulsion threshold, hydrocarbon pooling threshold, distribution threshold, source-control theory, source rock, Bozhong Depression, Bohai Sea waters

CLC Number:

TE132.1

Xia Qinglong, Pang Xiongqi, Jiang Fujie, Ma Xingzhi. Control of source rock on hydrocarbon accumulation and prediction of favorable plays in the Bozhong Depression of the Bohai Sea waters[J]. Oil & Gas Geology, 2009, 30(4): 398-404,411.

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Control of source rock on hydrocarbon accumulation and prediction of favorable plays in the Bozhong Depression of the Bohai Sea waters

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