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川西侏罗系蓬莱镇组气藏属于浅层低渗砂岩气藏，其储层特征和损害机理在国内同类气藏中具有典型性和代表性。文章通过现代岩心分析手段和系列模拟实验较为系统地探讨和评价了其储层损害机理和损害程度。研究结果表明，蓬莱镇组气藏主要损害机理为水锁损害，同时还具有较强的碱敏性、水敏性和裂缝应力敏感性，钻井完井过程中主要表现为工作液滤液水锁和固相侵入损害。文章最后提出了相应的储层保护建议。

Research on the Formation Damage to Penglaizhen Formation Shallow Gas Reservoirs of Jurassic in West Sichuan Basin

Penglaizhen Formation gas reservoirs of Jurassic in West Sichuan Basin belong in the shallow low permeability sandstone ones and their reservoir characteristics and damage mechanisms are of typicalness and representativeness in the congeneric gas reservoirs in China.Their reservoir damage mechanisms and degrees were systematically discussed and evaluated by the authors by use of modern core analysis means and a series of simulating experiments.Through studying it is shown that the principal damage mechanism of Penglaizhen Formation gas reservoirs is water locking damage besides which there are still relatively strong alkaline sensitivity,water sensitivity and fracture stress sensitivity and it is also expressed as the water locking damage of the filtrate of working fluid and its solid intrusion damage in the processes of drilling and completing.Finally,relevant suggestions for protecting reservoir from damage are proposed in the paper.