基于岩石水力压裂微观破裂机制尚未被厘清的实际,以线弹性破裂理论为基础,以网格化定量模拟为手段,通过构建储层微观结构简化模型,对水力压裂缝延伸的微观过程开展模拟。依据模拟结果,对微观破裂次序、位置展开深入剖析,提出水力压裂的两种微观破裂模式,分别为沿孔喉突破的“结构破裂”和沿晶体薄弱面延伸的“本体破裂”。其中,“结构破裂”为主要破裂方式,“本体破裂”有利于增加新的渗流通道,对于提高采收率意义重大。 Based on the fact that the hydraulic rupture mechanism of rock hydraulic fracturing has not yet been clarified, based on the theory of linear elastic rupture and by the method of gridding quantitative simulation, a microcosmic simplified model of reservoir is constructed to simulate the microscopic process of hydraulic fracturing extension . According to the simulation results, the microscopic rupture sequence and location are analyzed in depth. Two kinds of microscopic rupture modes of hydraulic fracturing are proposed, which are the “rupture” and the “rupture of body” “. Among them, ”structural rupture “ as the main mode of rupture, ”body rupture " is conducive to the increase of new seepage channels, for improving oil recovery is of great significance.