Geological Conditions And Resource Potential Of Permian Shale Gas In Renminzhen Area Of Songliao Basin

Shale gas reserves are huge,and now it has become the focus of unconventional oil and gas research at home and abroad.In this paper,the thickness,buried depth,distribution,geological conditions of shale gas enrichment,favorable areas and resource potential of Permian shale in renminzhen area of Songliao basin are systematically studied by using the integrated seismic geological geochemical evaluation method,in order to provide geological basis for finding favorable areas of shale gas.The main conclusions are as follows:Based on the newly compiled thickness map of Permian Linxi formation and Zhesi formation in renminzhen area,the thickness,buried depth and distribution characteristics of Permian in renminzhen area are determined.The average thickness of Linxi formation is 1261.52m,and the average thickness of Zhesi formation is 531.65m.The formation thickness is very thick and widely distributed in the whole area;The burial depth of the top surface of the Permian Linxi formation is-800～-2600m,and that of the Zhesi formation is-1450～-3750m,which is moderate.The geological conditions of shale gas in Renmin town are systematically summarized.The average thickness of shales in Zhemin area is 393.03m,and the average thickness of shales in Zhemin West formation is shown in Zhemin West formation;Organic carbon content>1.0%;Ro has a thermal evolution stage of 1.3%～2.5%maturity high maturity;The burial depth is moderate and has good conditions for shale gas enrichment.Through TOC,Ro,thickness,buried depth,gas bearing property and other factors of dark shale of Linxi formation and Zhesi formation in renminzhen area,the favorable area for shale gas enrichment is optimized,with an area of 614.19km~2,which provides a new field and points out a new direction for Permian shale gas exploration in renminzhen area.