Southwest Petroleum University

China University of Geosciences (wuhan)

China University of Petroleum

University of Electronic Science and Technology of China

Binsong Zheng

Lei Chen

Kun Zhang

Xinyang He

Bin Li

Xueying Wang

Fengli Han

Yipeng Liu

Xuefei Yang

Jingru Ruan

Hengfeng Gou

Shu Jiang

Xiong Ding

Jun Peng

Jinhua Liu

Weishi Tang

Yi Zhang

Lintao Li

Yan Song

Hulin Niu

Ping Liu

Chengzao Jia

Yi Shu

Jiayi Liu

Lu Lu

Yi Xiao

Xuri Huang

Yiting Qiao

Laiting Ye

Meijia Wu

Xuejiao Yuan

Pei Liu

Zhenxue Jiang

Zeyun Wang

Lin Jiang

Hong Liu

Xiangyu Fan

Hu Zhao

A method for quantitative evaluation of self-sealing property of organic-rich shale includes: S1, selecting geological parameters for evaluating the self-sealing property of the organic-rich shale; S2, taking organic-rich shale samples, and measuring the geological parameters of each sample; S3, calculating a weight coefficient w; of each geological parameter; S4, calculating a self-sealing evaluation coefficient S, and correcting the S to obtain a corrected self-sealing evaluation coefficient S'; S5, establishing a self-sealing evaluation standard of the organic-rich shale according to the S′, wherein if S′≥0.6, the self-sealing grade is excellent, if 0.45≤S′<0.6, the self-sealing grade is good, if 0.3≤S′<0.45, the self-sealing grade is medium, and if S′<0.3, the self-sealing grade is poor. According to the method, the self-sealing property of the shale is quantitatively evaluated, and the preservation condition of the shale gas in the shale formation can be more accurately predicted.

Method for quantitative evaluation of self-sealing property of organic-rich shale

Provided is an analysis method for determining gas-bearing situation of an unknown shale reservoir, includes: S, selecting a shale reservoir of a target interval of a place; and collecting data of parameters of cores of each of a known gas-bearing shale reservoir A and a known water-bearing shale reservoir B; S, calculating average values of the parameters of each of the reservoirs A and B respectively; S, calculating average differences of the parameters of each of the reservoirs; S, calculating covariance values of the parameters of each of the reservoirs; S, establishing, according to the covariance values, an equation group and resolving discriminant coefficients; S, establishing a discriminant equation according to the discriminant coefficients and solving a discriminant index; and S, obtaining values of parameters of cores of a sample of the unknown shale reservoir, calculating a discriminant value, and determining gas-bearing situation of the unknown shale reservoir.

Analysis method for determining gas-bearing situation of unknown shale reservoir

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Chengdu, China

Binsong Zheng