济阳坳陷前第三系油气勘探前景

doi:10.11743/ogg20050516

Abstract

Abstract:

Three pre-Tertiary source rock sequences are developed in Jiyang depression,including Lower Paleozoic carbonates,Upper Paleozoic coal measures and Mesozoic Jurassic coal measures,of which the Upper Paleozoic coal measures are the best.Therefore,gas reservoirs that have been generated and reservoired indigenously should be taken as the main targets of exploration in pre-Tertiary in Jiyang depression.Focus should be put on the Upper Paleozoic petroleum system,with considerations being given to Mesozoic petroleum system.The geologic features and reservoiring history of Gu-1 gas reservoir in Gubei area indicate that formation of gas reservoirs characterized by being generated and reservoired indigenously has largely depended on the development of the Upper Paleozoic source rocks,large anticlinal traps and good timing of source-reservoir-cap rocks in the deep sag area.Comprehensive evaluation of the distribution of favorable source rocks,reservoir and seal conditions and trap types indicates that there are 7 favorable exploration prospects in the Upper Paleozoic in Jiyang depression,including Gubei,Gunan,Luojia and Guojuzi in Zhanhua sag,Jinjia and Linfanjia in Dongying sag,and Chexi in Chezhen sag,and 4 less favorable prospects,including Chengdong and Yinan in Zhanhua sag and southern slopes of both Dongying and Huimin sags.

Key words: secondary hydrocarbon generation, effective reservoir, pre-Tertiary, exploration potential, Jiyang depression

CLC Number:

TE112.1

Hu Zongquan, Zhou Xinke, Zhang Yulan. Potential of petroleum exploration in pre-Tertiary in Jiyang depression[J]. Oil & Gas Geology, 2005, 26(5): 655-660.

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Potential of petroleum exploration in pre-Tertiary in Jiyang depression

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