低渗透和特低渗透气藏提高采收率技术研究现状

Study on Improving Recovery processes for Low and Extremely Low Permeability Gas Reservoirs

低渗透气藏和特低渗透气藏在我国占有相当大的比例。储层物性差、地质条件和渗流机理复杂,造成气井稳产状况差、采收率低。通过查阅大量相关文献,分析低渗透气藏和特低渗透气藏低产和低采收率的原因,总结现有技术条件下,提高低渗透气藏和特低渗透气藏的采收率和产量的对策、途径和方法。

Low and extremely low permeability gas reservoirs occupy a large proportion of total gas reservoirs in China.Reservoirs physical property is poor,geologic condition and infiltrating fluid mechanism are complex,which lead the single gas well reservoir volume output shortness.At the same time,the single gas rate maintenance capability and recovery ratio are very low.In this paper,it was found out the reasons about low output and recovery of extremely low permeability gas reservoirs.Some methods to improve output and recovery were put forward.