Time-temperature effect on cavity stability during gas injection and production in gas storage with salt caves

被引：0

作者：

Li W. ^{[1
,2
]}

Jiang Y. ^{[3
]}

Shan B. ^{[4
]}

Yu X. ^{[5
]}

Wang C. ^{[1
]}

机构：

[1] School of Mechanical and Storage Engineering, China University of Petroleum, Beijing

[2] State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, Hubei

[3] School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi

[4] Jiangsu Gas Storage Branch, PetroChina Huabei Petroleum Administration, Zhenjiang, 212004, Jiangsu

[5] Sinopec Sichuan to Eastern China Natural Gas Transmission Pipeline Co., Ltd., Wuhan, 430020, Hubei

来源：

Shiyou Xuebao/Acta Petrolei Sinica | 2020年 / 41卷 / 06期

关键词：

Cavity stability; Gas injection and production; Gas storage with salt caves; Numerical simulation; Thermal stress;

D O I：

10.7623/syxb202006011

中图分类号：

学科分类号：

摘要：

Changes in the injection and production cycle of the underground gas storage with salt caves will cause periodic changes in the temperature and pressure of gas in the cavity, which will cause thermal stress in the surrounding rocks, endangering the safe operation during injection and productionin gas storage. Based on the theory of variable mass thermodynamics, the paper derives the differential equations of the gas temperature and pressure in the cavity changing with timeat avariable injection-production ratio, which are further verified by the existing research examples. Based on the thermal-solid coupling model of single cavity, a study is performed on the impacts of thermal effect, injection-production ratio, and thermal conductivity of salt rock on cavity stability during gas injection and production, respectively. For the process of gas injection, the thermal effect, and an increase in the gas injection rate and the thermal conductivity of salt rock help to avoid tensile damage in surrounding rocks and maintain the stability of the cavity. For the process of gas production, the thermal effect, and an increase in the gas injection rate and the thermal conductivity of salt rock will aggravate tensile damage in surrounding rocks, which is not conducive to cavitystability. © 2020, Editorial Office of ACTA PETROLEI SINICA. All right reserved.

引用

页码：762 / 776

页数：14

共 20 条

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