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

被引：0

作者：

Li J. ^{[1
,2
]}

Zhao G. ^{[1
,2
]}

Qi Z. ^{[1
,2
]}

Yin B. ^{[1
,2
]}

Xu X. ^{[3
]}

Fang F. ^{[1
,2
]}

Yang S. ^{[1
,2
]}

Qi G. ^{[3
]}

机构：

[1] The Key Laboratory of Complex Oil and Gas Field Exploration and Development of Chongqing Municipality, Chongqing

[2] School of Petroleum Engineering, Chongqing University of Science and Technology, Chongqing

[3] Exploration and Development Research Institute of Sinopec Zhongyuan Oilfield Company, Puyang

来源：

Shiyou Kantan Yu Kaifa/Petroleum Exploration and Development | 2021年 / 48卷 / 04期

关键词：

Gas storage layer selection; Gas storage rebuilt from gas reservoirs; Injection and production capacity; Multi-cycle injection and production; Reservoir stress sensitivity;

D O I：

10.11698/PED.2021.04.16

中图分类号：

学科分类号：

摘要：

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. Low permeability gas zones 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. © 2021, The Editorial Board of Petroleum Exploration and Development. All right reserved.

引用

页码：835 / 842

页数：7

共 21 条

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