煤层气钻井过程中的储层伤害及保护技术

为了认识钻井过程中非常规储层的伤害机理，以煤层储层为例，系统地调研煤层气成藏机理，分析煤层气储层特征、储层伤害机理，目前煤层钻井储层伤害研究主要体现在钻井技术和钻井液两方面，结合煤层气钻井储层伤害研究的现状，开展钻井对储层伤害机理的讨论，采用合理的工艺方法对其钻完井过程中的储层进行保护。

Reservoir Damage and Protection Technology in the Process of Coal Bed Gas Well Drilling

In order to understand the damage mechanism of unconventional reservoirs in drilling, taking the coal reservoir as an example, the formation mechanism of coalbed methane system was investigated; characteristics and damage mechanism of coalbed gas reservoirs were analyzed. The present research on the reservoir damage in coal seam drilling is mainly embodied in two aspects of drilling technology and drilling fluid. Combined with study on the damage situation of CBM well reservoir, the damage mechanism of the formation caused by drilling was discussed, the reasonable method was put forward to protect the formation in the process of drilling and well completion.