盐穴天然气地下储气库运行过程的关键技术问题

Critical Technology Problems in Operation of Natural Gas Storage Caverns in Salt Formation

在具有岩盐矿床地质构造的地区,将天然气储存在地下含盐岩层内,实现在短期内提供高容量的储备,是目前各国普遍采用的方法。结合国外相关技术文献及部分研究成果,对盐穴储库运行过程的关键技术问题,主要包括:如何在运行过程减少溶腔的收敛性,防止水化物的形成,溶腔建腔过程形成的冷带和残留盐水对运行过程的影响;垫层气技术、运行的稳定性及注采循环中应注意的问题。文中分别进行了较详细的论述,为今后国内盐穴储库的运行研究提供依据和技术支持。

It is the general method used by many countries that natural gas is stored in underground salt formation for providing high capability in area with the deposits of rock salt. In this paper, combined with correlative technology literatures and research fruits in foreign countries, the critical technology questions in operation of gas storage caverns in salt formation were discussed. The issues include reducing the constringency of caverns in operation, avoiding forming of hydrate, the influence of cool zone and rudimental brine in caverns forming process on operation, cushion gas technology, stability of operation and noticed questions in injection and production. It prorides experiences and technology for the studies of natural gas storage caverns in salt formation in China.