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Featured researches published by Jingshou Liu.


Petroleum Science | 2018

Quantitative multiparameter prediction of fault-related fractures: a case study of the second member of the Funing Formation in the Jinhu Sag, Subei Basin

Jingshou Liu; Wen-Long Ding; Junsheng Dai; Yang Gu; Haimeng Yang; Bo Sun

In this paper, the analysis of faults with different scales and orientations reveals that the distribution of fractures always develops toward a higher degree of similarity with faults, and a method for calculating the multiscale areal fracture density is proposed using fault-fracture self-similarity theory. Based on the fracture parameters observed in cores and thin sections, the initial apertures of multiscale fractures are determined using the constraint method with a skewed distribution. Through calculations and statistical analyses of in situ stresses in combination with physical experiments on rocks, a numerical geomechanical model of the in situ stress field is established. The fracture opening ability under the in situ stress field is subsequently analyzed. Combining the fracture aperture data and areal fracture density at different scales, a calculation model is proposed for the prediction of multiscale and multiperiod fracture parameters, including the fracture porosity, the magnitude and direction of maximum permeability and the flow conductivity. Finally, based on the relationships among fracture aperture, density, and the relative values of fracture porosity and permeability, a fracture development pattern is determined.


Energy Sources Part A-recovery Utilization and Environmental Effects | 2018

Study on pressure sensitivity of tight sandstone and its influence on reservoir characteristics

Yang Gu; Wenlong Ding; Min Yin; Jingshou Liu; Zikang Xiao; Baocheng Jiao; Haoran Shen

ABSTRACT The rocks with low permeability have a strong sensitivity to pressure. By changing the size of confining pressure, we can realize the effective stress change of rocks and calculate the permeability change under different effective stress to evaluate the stress sensitivity of the reservoir. We analyzed the factors affecting the stress sensitivity of tight sandstone reservoir, including material composition, fracture development, and pore structure of rock. The results show that the stress sensitivity of microfractured core is very weak, and the permeability change rate is less than 20%. The sensitivity curve is divided into two stages: the permeability decline rate in the first stage is more than 30%, mainly due to the pseudoplastic deformation of the fracture under compression. In the second stage, the decrease of permeability is less than 30%. At this stage, the elastic deformation mainly depends on the compression of the rock skeleton particles, and the net stress of the actual reservoir is mostly at this stage. Therefore, the application of the second stage to evaluate the stress sensitivity of reservoirs is more practical, and the stress sensitivity of microfracture cores is higher than that of matrix cores. Through the analysis of pressure-sensitive mechanism and experimental data, it is concluded that the main controlling factors affecting rock stress sensitivity are fracture development and pore structure of rock, while rock material composition is a relatively minor factor.


Petroleum Science and Technology | 2017

The methane adsorption characteristics of marine shale

Yang Gu; Wenlong Ding; Jingshou Liu; Zikang Xiao; Changcheng Lin

ABSTRACT The marine shale gas in South China has great exploration potential, and exploration in the Sichuan Basin has been successful, but the degree of exploration is low in Guizhou Province. We used organic geochemical analyses, X-ray diffraction (XRD) analysis, and CH4 adsorption experimental methods to study pore structures and their effects on the methane adsorption capacity of organic-rich shales. According to the measured isothermal adsorption data, and based on the theory of adsorption potential, the calculation model of shale adsorption gas under the influence of temperature and pressure is established, and the model is validated and applied by the measured isothermal adsorption data. The results show that the adsorption performance of shale samples is better, with the average adsorption capacity of 4.38 ml/g. The Langmuir model fits well with the adsorption curves. The adsorption capacity of shale samples increases as total organic carbon (TOC) increases and temperature decreases. The adsorption potential theory was used to explain the influence of shale adsorption factors.


Tectonophysics | 2017

3D geomechanical modeling and numerical simulation of in-situ stress fields in shale reservoirs: A case study of the lower Cambrian Niutitang formation in the Cen'gong block, South China

Jingshou Liu; Wenlong Ding; Haimeng Yang; Ruyue Wang; Shuai Yin; Ang Li; Fuquan Fu


Marine and Petroleum Geology | 2017

Simulation of paleotectonic stress fields and quantitative prediction of multi-period fractures in shale reservoirs: A case study of the Niutitang Formation in the Lower Cambrian in the Cen'gong block, South China

Jingshou Liu; Wenlong Ding; Ruyue Wang; Shuai Yin; Haimeng Yang; Yang Gu


Journal of Petroleum Science and Engineering | 2018

Methodology for quantitative prediction of fracture sealing with a case study of the lower Cambrian Niutitang Formation in the Cen'gong block in South China

Jingshou Liu; Wenlong Ding; Ruyue Wang; Haimeng Yang; Xinghua Wang; Ang Li


Journal of Asian Earth Sciences | 2018

Quantitative prediction of fractures using the finite element method: A case study of the lower Silurian Longmaxi Formation in northern Guizhou, South China

Jingshou Liu; Wenlong Ding; Haimeng Yang; Kai Jiu; Zhe Wang; Ang Li


Journal of Petroleum Science and Engineering | 2018

The developmental characteristics of natural fractures and their significance for reservoirs in the Cambrian Niutitang marine shale of the Sangzhi block, southern China

Xinghua Wang; Wenlong Ding; Long Cui; Ruyue Wang; Jianhua He; Ang Li; Yang Gu; Jingshou Liu; Zikang Xiao; Fuquan Fu


Tectonics | 2018

Quantitative Prediction of Lower Order Faults Based on the Finite Element Method: A Case Study of the M35 Fault Block in the Western Hanliu Fault Zone in the Gaoyou Sag, East China

Jingshou Liu; Wenlong Ding; Junsheng Dai; Zhonghu Wu; Haimeng Yang


Engineering Geology | 2018

Methodology for predicting reservoir breakdown pressure and fracture opening pressure in low-permeability reservoirs based on an in situ stress simulation

Jingshou Liu; Wenlong Ding; Yang Gu; Zikang Xiao; Junsheng Dai; Peng Dai; Xiaoshan Chen; Gang Zhao

Collaboration


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Wenlong Ding

China University of Geosciences

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Yang Gu

China University of Geosciences

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Ang Li

China University of Geosciences

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Junsheng Dai

China University of Petroleum

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Zikang Xiao

China University of Geosciences

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Shuai Yin

Xi'an Shiyou University

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Xinghua Wang

China University of Geosciences

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Baocheng Jiao

China University of Geosciences

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