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《Petroleum Geology & Experiment》 2015-02
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Mechanism and quantitative evaluation method of the petroleum migrationn system

Lin Yuxiang;Sun Ningfu;Guo Fengxia;Yan Xiaoxia;Meng Cai;Li Xiaofeng;Liu Hu;Li Xiuqin;College of Earth Science and Engineering,Shandong University of Science and Technology;  
A classification scheme for the petroleum migration system was proposed through the analysis and summary of the migration systems of the main petroliferous basins in China in order to reduce the multiple solutions and make more objective and accurate evaluation possible. The migration elements were classified into three types. The first type was the necessary elements,which included transportation space,power and fluid.The second type was a variety of elements that described the significant features of the migration system,including direction and capability. The third type was the elements that complemented the migration system,such as the scale and hierarchy as well as the formation and function period of the migration system. Based on the migration mechanism,a new nomenclature of the system was proposed: the scale and hierarchy of the migration system+ the period of formation and function + fluid transport direction + the capability of transporting fluid + migration power + migration space. Moreover,according to the contribution of elements on oil and gas migration and accumulation,this article systematically summarized the quantitative evaluation criterion and the assignment principle of the merits of each migration element. The restoration methods and steps of ancient migration system were determined. The recovery of paleo-pores and paleo-structure was the key to migration system recovery during the accumulation period. The method paved the way for the quantitative evaluation of migration,and made it possible to predict potential oil and gas reservoirs better and to improve the exploration success ratio.
【Fund】: 国家自然科学基金面上项目(41172108);; 国家油气专项“十二五”课题(2011ZX05033-04 2011ZX05004-01);; 中国石油“十二五”科技攻关课题(2011A-0203)资助
【CateGory Index】: P618.13
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