Feasibility analysis about taking CO<sub>2</sub> as cushion gas for gas storage rebuilt upon depleted gas reservoirs

Hu Shuyong; Hu Xinrui; Li Yongkai; Ma Junxiu

doi:10.13809/j.cnki.cn32-1825/te.2018.05.009

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Feasibility analysis about taking CO₂ as cushion gas for gas storage rebuilt upon depleted gas reservoirs

更新时间：2025-12-11

- Feasibility analysis about taking CO₂ as cushion gas for gas storage rebuilt upon depleted gas reservoirs
- Petroleum Reservoir Evaluation and Development Vol. 8, Issue 5, Pages: 56-59(2018)
- 作者机构：
  
  1. 西南石油大学油气藏地质及开发工程国家重点实验室,四川,成都,610500
  2. 中国石油川庆钻探工程有限公司苏里格项目经理部,内蒙古,鄂尔多斯,017000
  3. 中国石油新疆油田分公司工程技术研究院,新疆,克拉玛依,834000
- 作者简介：
- 基金信息：
- DOI：10.13809/j.cnki.cn32-1825/te.2018.05.009
  CLC： TE822
- Published：2018
- 稿件说明：
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Hu Shuyong, Hu Xinrui, Li Yongkai, et al. Feasibility analysis about taking CO₂ as cushion gas for gas storage rebuilt upon depleted gas reservoirs[J]. Petroleum Reservoir Evaluation and Development, 2018, 8(5): 56-59.
DOI：

Hu Shuyong, Hu Xinrui, Li Yongkai, et al. Feasibility analysis about taking CO₂ as cushion gas for gas storage rebuilt upon depleted gas reservoirs[J]. Petroleum Reservoir Evaluation and Development, 2018, 8(5): 56-59. DOI： 10.13809/j.cnki.cn32-1825/te.2018.05.009.

摘要

天然气地下储气库是当今世界最主要的天然气储存方式和调峰手段。天然气地下储气库需要用垫层气来保持储层压力、防止水体侵入和保证储气库工作的稳定性。垫层气量一般占储气库总量的30 %~70 %。若采用天然气本身作垫层气

当一个储气库废弃时

相当数量的天然气不能被开采出来

浪费了大量的天然气资源。通过对热力学性质研究及CO

与天然气混气实验研究发现

在储气库的运行压力及温度条件下

处于临界状态附近

其“高密度”、“高黏度”的物理特性使得CO

与天然气呈现出分层而不是混合的状态

这表明CO

作枯竭气藏型储气库的垫层气是可行的。

Abstract

The underground gas storage is one of the major storage and peak-shaving means in the world. It needs the cushion gas to keep the reservoir pressure

prevent the water intrusion and ensure the stability of the gas storage. The cushion gas volume generally accounts for 30 % to 70 % of the total volume of the gas storage. If we just took the natural gas as the cushion gas

a considerable amount of natural gas would not be mined when the storage was abandoned

and a large amount of natural gas would be wasted. The study of thermodynamic properties and the mixed experiments of CO

and natural gas show that taking CO

as the cushion gas for gas storage rebuilt upon the depleted gas reservoirs is feasible

becau

se CO

is in the critical state under the operating pressure and temperature. Its physical properties of “high density” and “high viscosity” make itself separate from the natural gas

rather than mix.

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Feasibility analysis about taking CO2 as cushion gas for gas storage rebuilt upon depleted gas reservoirs

DOI：10.13809/j.cnki.cn32-1825/te.2018.05.009

摘要

Abstract

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Feasibility analysis about taking CO₂ as cushion gas for gas storage rebuilt upon depleted gas reservoirs