收稿日期: 2009-04-08
修回日期: 2009-05-04
网络出版日期: 2009-12-10
基金资助
中国海洋石油公司重大课题(编号:SC06TJ\|TQL-004)资助.
Forming Mechanism of Abnormally Overpressure in the Partial Jinzhou 27 Structure Area, Liaodong Bay
Received date: 2009-04-08
Revised date: 2009-05-04
Online published: 2009-12-10
邓津辉, 武强, 魏刚, 徐长贵, 柴永波 . 辽东湾海域锦州27构造区局部异常超压成因机制[J]. 天然气地球科学, 2009 , 20(6) : 930 -934 . DOI: 10.11764/j.issn.1672-1926.2009.06.930
The Jinzhou 27 structure area lies in the north of the Liaodong Bay nearby the Liaozhong hydrocarbon-generation over\|pressured sag and has a strong charging ability. Near-source fan delta is developed in this area, and its sandstone is litharenite. There is some porosity in litharenite while permeability is comparatively bad. From the main body of the fan delta front to its distal end, permeability becomes worse with increase of shale content. Hydrocarbons made from the Liaozhong sag charged into higher positions of the structure area driven by overpressure, but the fluids in the pores could not escape freely because of bad permeability. As a result, overpressure was formed in the distal end of the fan delta reservoir.
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