页岩气储层工作液伤害机理研究现状

目前工作液对页岩气产出的影响和与之对应的页岩储层伤害机理研究较少, 而其与常规天然气储层伤害有着较大差异。为此，首先分析了页岩气储层伤害潜在因素以及深层页岩气储层伤害的特殊性，其次阐述了页岩气渗流伤害相关的页岩储层的敏感性和工作液伤害机理、返排时伤害解除及渗吸机理、工作液对页岩气吸附/解吸与扩散的伤害机理的研究现状和进展，最后提出该研究方向需要关注和亟待解决的问题。

Review of working fluid damage mechanism for shale gas reservoir

Recently the influence of working fluid on shale gas production and the corresponding shale reservoir damage mechanism are less studied, and it is quite different from conventional natural gas reservoir damage. Thus, firstly, the potential factors of shale gas reservoir damage and the special characteristics of deep shale gas reservoir damage are analyzed; secondly, the research status and progress of the formation damage mechanism for shale gas reservoir are described, including formation sensitivity and working fluid damage related to shale gas seepage damage, formation damage relief in flowback and imbibition, the damage of working fluid on shale gas adsorption/desorption and diffusion event; finally the problems that need to be paid attention to and urgently need to be solved are expressed .