低渗透气藏水锁效应研究进展

Research progress of water lock effect in low permeability gas reservoirs

水锁效应是影响气井生产的一个主要因素,尤其是在低渗透气藏这种影响作用更显著。详细调研了当前在气藏水锁效应方面的研究进展,总结了水锁效应产生的机理和水锁影响因素方面的研究成果,介绍了解除水锁效应的新方法和新技术。研究认为:对水锁效应产生机理的认识是解除水锁效应的核心;控制影响水锁效应的因素可以减轻水锁的程度;对具体的井有针对性地选用消除水锁的方法。对相关研究成果进行全面系统的总结,并结合目前的研究现状有针对性地提出应该重点解决的问题,将有助于合理利用各种方法解除低渗透气藏气井水锁效应,提高气藏开发效果。

Water lock effect is one of the main factors affecting gas well productivity,especially in low permeability gas reservoirs.This paper investigates the progress on the study of water lock effect in gas reservoirs,summarizes the research achievements in mechanism and influence factors of water lock,and introduces new techniques and meth-odology for removing water lock effect.The result shows that understanding of water lock mechanism is the key to relieve water lock and the degree of water lock can be alleviated by controlling the affecting factors.Methods for eliminating water lock shall be accordingly selected for a specific well.Related research results have been summarized;keyproblems to be solved are presented.This study will be helpful to relieve water lock in gas well and enhance devel-opment effect in low permeability gas reservoir.