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《Science Technology and Engineering》 2015-36
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Research on Petroleum Geological Conditionsand Prediction of Favorable Exploration Zone in Hari Sag of Yingen-Ejinaqi Basin

WANG Xiao-duo;LIU Hu-chuang;YU Jun;CHEN Zhi-jun;HE Xiao;LI Ke-she;LIU Tao;HAN Chang-chun;Research Institute of Shaanxi Yanchang Petroleum Corporation;  
Hari sag,one of secondary structure units in Suhongtu depression in the north central of Yingen-Ejinaqi basin,has lower level of exploration and unacceptable result of exploration. Depending on comprehensive analysis of its petroleum geological conditions-oil source,reservoir,cap rock,traps,it shows that hydrocarbon source rocks occurs in the layers of Lower Cretaceous and Permian mudstone,but Permian hydrocarbon source rocks is poor in the abundance. Effective source rocks are not found yet. Considering the organic type,abundance and maturity,Suhongtu source rocks is better for oil and gas exploration focused on potential strata,and the layers of yingen and Bayingebi are the second layer system. The degree of development of hydrocarbon source rocks is the best in the center of lake. Reservoirs of the lower Cretaceous are mainly shallow lake sand bar,sand delta and nearshore subaqueous fan sand body. Capping overall condition is good,with the same characteristics of hydrocarbon source rocks. The more the degree of development of hydrocarbon source rocks in the basin center area best,seal condition better,more depressed edge to seal condition worse. Traps are mainly structural traps and lithologic traps,structural traps are mainly fault block and broken nose traps. Oil and gas shows indicates the main target group of the hari sag is Suhongtu depression,followed Bayingebi,based on the establishment of hydrocarbon accumulation mode and elements of reservoir superimposition,the favorable exploration areas of Suhongtu group are predicted,they lies in the western steep belts of YHC1 well,coving the overlapping area is 23. 9 km~2.
【Fund】: 陕西延长石油(集团)有限责任公司科技攻关项目(ycsy2015ky-A-06)资助
【CateGory Index】: P618.13
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Chinese Journal Full-text Database 3 Hits
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