压裂液吸附对煤层损害的实验研究及影响因素分析

压裂液对煤储层的伤害机理是目前煤层气井压裂技术的主要研究内容之一.由于煤岩的矿物组成和孔隙结构等多方面的特殊性,在压裂施工过程中压裂液对煤层的伤害不同于其对常规油气藏储层的伤害.相关研究表明:在煤层气井压裂施工过程中,压裂液与煤层接触所造成的渗透率的降低,一般是由煤基质的割理被堵塞及煤基质对压裂液的吸附所造成.重点对辽河油田阜新组煤层由于压裂液的吸附所引起的煤层伤害进行了实验研究,并结合相关理论和实验结果,对压裂液吸附对煤层伤害的影响因素进行了分析.

Experimental Research on Coal-bed's Damage Induced by Fracturing Fluid Adsorption and the Impacted Factors Analysis

At the moment,the damage mechanism induced by fracturing fluid is the major content in coal-bed gas well fracture technique.Because of some special characters of the coal bed's mineral component and pore structure,the damage which induced by the fracturing fluid is different from the hydrocarbon reservoir.Some relevant research indicated that the contact between the fracturing fluid and the coal layer surface will decrease the permeability of the coal layer during the fracturing process,it is the result of ...