Simulation research on carbon dioxide as cushion gas in gas underground reservoirs
TAN Yu-fei, Lin Tao
School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090,China
Abstract:
Aimed at the problem of mixing working gas and cushion gas in carbon sequestration technology, the feasibility of using carbon dioxide as the cushion gas in reservoirs is discussed firstly. At the usual condition of reservoirs, carbon dioxide is a kind of supercritical fluid with high condensability, high viscosity and high density. Secondly, this article studies the laws of formation and development of mixing zone by numerical simulation and analyses the impact on mixing zone brought by different injection modes and rational ratios of cushion gas in reservoirs. It is proposed that the appropriate injection ratio of cushion gas is 20%-30%. Using carbon dioxide as cushion gas in gas reservoirs is able to make the running of natural gas reservoirs economical and efficient.
Key words: carbon dioxide gas reservoir cushion gas carbon sequestration
DOI：10.11916/j.issn.1005-9113.2009.01.018
Clc Number:TE972
Fund:
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Simulation research on carbon dioxide as cushion gas in gas underground reservoirs
本站小编 哈尔滨工业大学/2019-10-23
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