利用地下含水层储存天然气应考虑的问题

在距离油气藏地区较远的大中城市，利用地下含水层储存天然气，是目前许多国家普遍采用的方法。我国还没有建设含水层地下储库的工程实践，其研究工作刚刚开始。为此，对利用地下含水层建造天然气储气库的选址、注采井布置、试注研究、对周围可能造成的影响、钻井完井对地层的损害、注采周期如何控制气体运移和水锥进、预防水化物沉积、确定储库气体泄漏量等一系列关键技术问题进行了阐述，并对其技术特性进行了分析，拓展了我国储气库科学研究的范围，以期为在我国开展含水层地下储气库的研究和建设工作提供理论依据和一些可借鉴的经验。

CRITICAL TECHNICAL PROBLEMS OF USING UNDERGROUND AQUIFER TO STORE NATURAL GAS

At present, in many countries it is a prevalent method that using underground aquifer to store natural gas in big or medium cities far away from oil-gas reservoirs. There has no engineering practice of constructing aquifer underground storages in China, where this research work is just under way. This article expounds a series of critical technical problems including selecting location of aquifer storages, disposal of gas wells, research of injection tests, potential impacts to entourage, damage to stratum while making and completing gas wells, how to control gas migration in injection-production cycle and water coning, preventing hydrate deposit, ascertaining gas leakage quantity in storages, at the same time, analyses technical characteristics of these problems, exploits the range of researches in China, supplies theoretic gist and referential experience to research and construct work for aquifer underground natural gas storage in China.