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《Fault-Block Oil & Gas Field》 2018-03
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Controlling factors of advantage reservoir and its model of mid-depth formation in No.3 Structure of Nanpu Sag

LI Liang;ZHANG Jingyi;ZHAO Xiaodong;LIU Xiao;QING Ying;QI Lixin;Research Institute of Exploration and Development,Jidong Oilfield Company,PetroChina;Evaluation Office,Jidong Oilfield Company,PetroChina;  
Based on core observation, thin section identification and laboratory data analysis, advantage mid-depth formation reservoir in No.3 Structure of Nanpu Sag was studied. The results show that the lithology of mid-depth reservoir in No.3 Structure of Nanpu Sag is arkose and lithic feldspathic. The lithology of advantage reservoir is mainly of the conglomeratic anisometric sandstone, sandy conglomerate and medium sandstone. The development of advantage reservoir is mainly controlled by sedimentary and structure and diagenesis. The underwater distributary channel sand body near provenance is best, which is the location of the most favorable reservoir development. Dissolution is the key factor for advantage reservoir formation, and the feldspar content is higher in the clastic components, which laid a good material basis for dissolution. Three zones of secondary porosity were developed from top to bottom in the most favorable reservoir. Southwest structure far from provenance and low-lying zone in the north of high potential area are the advantage reservoir sand body development zone controlled by the structure.
【Fund】: 国家科技重大专项课题“南堡凹陷油气富集规律与增储领域”(2016ZX05006-006);; 中国石油股份公司科技重大专项“南堡及外围第四次油气资源评价”(2014E-050211)
【CateGory Index】: P618.13
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