【摘要】 随着“西气东输”等全国性供气管网系统的形成,城市季节性用气调峰矛盾日益突出,建立适合我国国情的天然气地下储气库新技术理论、新方法,使储气库经济高效运行,是目前迫切需要解决的具有重要前瞻意义和经济价值的预研性应用基础研究课题。采用CO2作地下储气库垫层气,既可节省沉积资金,又可实现碳隔离储存,减少温室效应。为此,对以CO2作为垫层气的最佳热力学条件及来源,CO2在不同工况下与天然气扩散混合的混沌特性,以及CO2替代气所占垫层气比例,最佳注采井位置、注采量、注采时间等问题研究的可行性进行了分析。研究成果不仅对创新和完善渗流扩散耦合理论、填补储气系统理论空白有重要学术价值,而且为今后我国碳隔离储存和储气库建设运行提供了理论依据和技术支持。更多还原

【Abstract】 As the national gas delivering system consisted of “West-east gas transmission” pipeline etc. appears, the season’s peak shaving problem of city gas supply becomes severe day by day. It is the important basic research subject with predictive and economic significance to develop new technology, theory and method of underground gas storages that fit Chinese situation to make the gas storages economically and efficiently operating. It can save the aggradations cost, realize the deposits of carbon sequestration and reduce the greenhouse effect to use CO₂ as the cushion gas of underground gas storage. Therefore, the issues such as the optical thermodynamic conditions and the source of CO₂ as cushion gas; the chaos characteristics of diffuse of carbon dioxide in natural gas under different working conditions; the proportion of carbon dioxide in the cushion gas; the optical positions of injection/recovery wells; the optical injection/recovery volume and time are studied. The study results not only innovate and improve the diffuse coupling theory of percolation, fill the blank of gas-storing system theory, but also provide the theoretical basis and technical support for deposits of carbon sequestration and gas storage building and operating. （Financed by the Projects of National Post-Doctor Fund）更多还原