页岩压裂影响因素三维模型数值分析

不同影响因素对页岩水力压裂效果有不同的影响。基于三维数值计算模型介绍了水力压裂的典型过程,针对水平最小主应力、页岩的弹性模量和渗透系数对压裂的影响进行了分析。结果表明:随着水平最小主应力的增加,裂缝高度也随之增加;随着页岩的弹性模量增加,裂缝的高度随之降低;随着渗透系数的增加,裂缝高度也随之增加;随着压裂液的黏度系数提高,裂缝的高度降低。

Three-dimensional model numerical analysis of factors influencing shale fracturing

Influence factors of hydraulic fracturing of shale have a direct impact on the fracturing effect. Based on the three-dimensional numerical calculation model, the paper studied the typical process of hydraulic fracturing. It analyzed the impact of the level of the minimum horizontal principal stress, elastic modulus and permeability coefficient on shale fracturing. The results show that: With the increase of the level of the minimum horizontal principal stress, the fracture height increased. With the increase of the elastic modulus of shale, the fracture height decreased. With the increase of the permeability coefficient, the fracture height also increased. With the increase of the viscosity coefficient of fracturing fluid, the height of fracture decreased.