【摘要】 研究裂缝和油藏间的相互作用和影响,运用油藏数值模拟方法建立了模拟现场阶跃性实验的裂缝——油藏联合系统的有限差分模型。综合考虑岩石的力学性质对裂缝开启及扩展的影响,用数值方法求解出每个过程中井底压力随注入时间的变化关系。通过模拟得到的数据和现场实测数据拟合,可确定地层的最小水平主应力和岩石的临界应力强度因子,并用实例说明了这种方法的可行性。更多还原

【Abstract】 A finite element model was established by studying the interaction of the fractureand the formation by coupling the fluid flow in both fracture and reservoir. The modelincorporates the effects of rock mechanics on the fracture opening/closing and fractureextension and consequently, on the pressure behavior during a step rate test. A proce-dure to history matches the step rate test data, to estimate the horizontal in-situ stressand the fracture toughness of the reservoir rock. This has been demonstrated by apply-ing the actual field data.更多还原