枯竭气藏型储气库CO2作垫层气的可行性研究

Reservoir Evaluation and Development ›› 2018, Vol. 8 ›› Issue (5): 56-59.

• Petroleum Engineering • Previous Articles Next Articles

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

Hu Shuyong¹,Hu Xinrui¹,Li Yongkai²,Ma Junxiu³

^1. State Key Laboratory of Oil & Gas Reservoir Geology Exploitation Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
^2. CCDC Sulige Project Management Department, Ordos, Inner Mongolia 017000, China
^3. Engineering technology research institude, Xinjiang Oilfield Company,PetroChina, Karamay, Xinjiang 834000, China

Received:2017-08-10 Online:2018-12-05 Published:2018-10-26

Abstract

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 CO₂ and natural gas show that taking CO₂ as the cushion gas for gas storage rebuilt upon the depleted gas reservoirs is feasible, because CO₂ 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.

Key words: depleted gas reservoirs, underground natural gas storage, cushion gas, feasibility analysis

CLC Number:

TE822

Shuyong Hu,Xinrui Hu,Yongkai Li, et al. Feasibility analysis about taking CO₂ as cushion gas for gas storage rebuilt upon depleted gas reservoirs[J]. Reservoir Evaluation and Development, 2018, 8(5): 56-59.

Figures/Tables 5

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

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