断-砂配置侧向输导油气能力研究方法的改进及应用

doi:10.11743/ogg20190510

Abstract

Abstract: In order to more precisely reveal the hydrocarbon distribution of fault zones in the upper source rock-lower reservoir assemblage,we present an improved method of quantifying the lateral transport capacity of the fault-sandstone configuration,considering both the effect of fault-sandstone contact length and physical property of sand bodies,and the effect of dip angles of sand bodies.Twelve faults in the middle-shallow layers were selected from five typical blocks in Nanpu Sag,Bohai Bay Basin,to quantitatively estimate and compare the lateral transport capacity of the configurations of the 12 faults and 67 sandstone layers in 16 wells by using the original and improved methods,respectively.The results show that:the parameter values obtained by using the improved method correlate positively with the height of oil-gas column in sand bodies,that is,the bigger the values are,the higher the oil-gas column becomes; and vice versa.When the parameter value is over 0.4,the sandstone reservoir contains oil or both oil and gas,while when its value is less than 0.4,the sandstone reservoir contains water or is dry,indicating the applicability of the improved method.The parameter values obtained with the improved method are remarkably lower than that worked out by the original method,indicating an overestimation by the original method and thus resulting in risks to oil-gas exploration.

Key words: fault-sandstone configuration, lateral transport, upper source rock-lower reservoir assemblage, fault, Nanpu Sag, Bohai Bay Basin

CLC Number:

TE122.1

Fu Hongjun, Jiang Hongfu, Wang Yunzeng, Li Ang, Fu Guang, Hu Huiting, Fan Zili. Improvement and application of the method for quantifying lateral transport capacity of fault-sandstone configuration[J]. Oil & Gas Geology, 2019, 40(5): 1048-1055.

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Improvement and application of the method for quantifying lateral transport capacity of fault-sandstone configuration

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