沁水盆地储层特征及潜在损害因素分析

针对页岩气开发生产过程中遇到的储层损害问题,笔者从构造特征、孔渗结构、温度压力、地层水组分、层系特征等方面详细描述了沁水盆地页岩气储层特征。通过对岩样进行的TOC测试、Ro测试、扫描电镜分析、薄片鉴定、全岩分析及含气量分析,得到了储层存在潜在的水敏、速敏和酸敏损害,考虑到页岩储层渗透率低、层理和微裂缝发育丰富等特点,储层也会存在一定的固相损害和应力敏感特性,钻井过程中应注意预防这些伤害。

Reservoir Characteristics and Potential Damage in Qinshui Basin

In view of the reservoir damage problems encountered in the development and production of shale gas, the authors described in detail the characteristics of shale gas reservoirs in Qinshui Basin from aspects of structural features, pore structure, temperature and pressure, formation water composition, Layer, the TOC, Ro, SEM, slice identification, whole rock analysis and gas content analysis of the rock samples, the potential water sensitivity, speed sensitivity and acid sensitivity of the reservoir are obtained. Considering the shale Reservoir permeability is low, and the development of microfractures is rich, the reservoirs will also have certain solid damage and stress sensitivity characteristics. During drilling and completion, attention should be paid to prevent these damages.