Stress sensitivity of formation during multi-cycle gas injection and production in an underground gas storage rebuilt from gas reservoirs

LI Jiqiang; ZHAO Guanqun; QI Zhilin; YIN Bingyi; XU Xun; FANG Feifei; YANG Shenyao; QI Guixue

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Stress sensitivity of formation during multi-cycle gas injection and production in an underground gas storage rebuilt from gas reservoirs

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Permeability sensitivity to stress experiments were conducted on standard core samples taken from Wen 23 Gas Storage at multi-cycle injection and production conditions of the gas storage to study the change pattern of stress sensitivity of permeability.A method for calculating permeability under overburden pressure in the multi-cycle injection and production process was proposed,and the effect of stress sensitivity of reservoir permeability on gas well injectivity and productivity in UGS was analyzed.Retention rate of permeability decreased sharply first and then slowly with the increase of the UGS cycles.The stress sensitivity index of permeability decreased with the increase of cycle number of net stress variations in the increase process of net stress.The stress sensitivity index of permeability hardly changed with the increase of cycle number of net stress variations in the decrease process of net stress.With the increase of cycle number of net stress variation,the stress sensitivity index of permeability in the increase process of net stress approached that in the decrease process of net stress.The lower the reservoir permeability,the greater the irreversible permeability loss rate,the stronger the cyclic stress sensitivity,and the higher the stress sensitivity index of the reservoir,the stronger the reservoir stress sensitivity.The gas zones with permeability lower than 0.3’10-3 mm2 are not suitable as gas storage regions.Stress sensitivity of reservoir permeability has strong impact on gas well injectivity and productivity and mainly in the first few cycles.

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《石油勘探与开发:英文版》 |2021年第4期|P.968-977|共10页
作者
LI Jiqiang; ZHAO Guanqun; QI Zhilin; YIN Bingyi; XU Xun; FANG Feifei; YANG Shenyao; QI Guixue;
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作者单位

The Key Laboratory of Complex Oil and Gas Field Exploration and Development of Chongqing Municipality Chongqing 401331 ChinaSchool of Petroleum Engineering Chongqing University of Science and Technology Chongqing 401331 China;

The Key Laboratory of Complex Oil and Gas Field Exploration and Development of Chongqing Municipality Chongqing 401331 ChinaSchool of Petroleum Engineering Chongqing University of Science and Technology Chongqing 401331 China;

The Key Laboratory of Complex Oil and Gas Field Exploration and Development of Chongqing Municipality Chongqing 401331 ChinaSchool of Petroleum Engineering Chongqing University of Science and Technology Chongqing 401331 China;

The Key Laboratory of Complex Oil and Gas Field Exploration and Development of Chongqing Municipality Chongqing 401331 ChinaSchool of Petroleum Engineering Chongqing University of Science and Technology Chongqing 401331 China;

Exploration and Development Research Institute of Sinopec Zhongyuan Oilfield Company Puyang 457000 China;

The Key Laboratory of Complex Oil and Gas Field Exploration and Development of Chongqing Municipality Chongqing 401331 ChinaSchool of Petroleum Engineering Chongqing University of Science and Technology Chongqing 401331 China;

The Key Laboratory of Complex Oil and Gas Field Exploration and Development of Chongqing Municipality Chongqing 401331 ChinaSchool of Petroleum Engineering Chongqing University of Science and Technology Chongqing 401331 China;

Exploration and Development Research Institute of Sinopec Zhongyuan Oilfield Company Puyang 457000 China;

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原文格式 PDF
正文语种 chi
中图分类矿床学;
关键词
gas storage rebuilt from gas reservoirs; multi-cycle injection and production; reservoir stress sensitivity; injection and production capacity; gas storage layer selection;

Stress sensitivity of formation during multi-cycle gas injection and production in an underground gas storage rebuilt from gas reservoirs

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