All reservoirs are fractured to some degree. Depending on the density, dimension, orientation and the cementation of natural fractures and the location where the hydraulic fracturing is done, preexisting natural fractures can impact hydraulic fracture propagation and the associated flow capacity. Understanding the interactions between hydraulic fracture and natural fractures is crucial in estimating fracture complexity, stimulated reservoir volume, drained reservoir volume and completion efficiency. However, because of the presence of natural fractures with diffuse penetration and different orientations, the operation is complicated in naturally fractured gas reservoirs. For this purpose, two numerical methods are proposed for simulating the hydraulic fracture in a naturally fractured gas reservoir. However, what hydraulic fracture looks like in the subsurface, especially in unconventional reservoirs, remain elusive, and many times, field observations contradict our common beliefs. In this study, the hydraulic fracture model is considered in terms of the state of tensions, on the interaction between the hydraulic fracture and the natural fracture (45°), and the effect of length and height of hydraulic fracture developed and how to distribute induced stress around the well. In order to determine the direction in which the hydraulic fracture is formed strikethrough, the finite difference method and the individual element for numerical solution are used and simulated. The results indicate that the optimum hydraulic fracture time was when the hydraulic fracture is able to connect natural fractures with large streams and connected to the well, and there is a fundamental difference between the tensile and shear opening. The analysis indicates that the growing hydraulic fracture, the tensile and shear stresses applied to the natural fracture.

所有储层都在一定程度上断裂。根据天然裂缝的密度，尺寸，方向和胶结作用以及水力压裂的位置，预先存在的天然裂缝会影响水力裂缝的扩展和相关的流量。了解水力压裂与天然压裂之间的相互作用对于估算压裂复杂性，增产的储层，排空的储层和完井效率至关重要。然而，由于存在具有渗透渗透和不同方向的天然裂缝，因此在天然裂缝的气藏中操作复杂。为此，提出了两种数值方法来模拟天然裂缝气藏中的水力压裂。然而，在地下，特别是在非常规油藏中，水力压裂的表现仍然难以捉摸，而且很多时候，野外观测与我们的普遍看法相矛盾。在这项研究中，考虑到水力压裂模型的张力状态，水力压裂与自然裂缝（45°）之间的相互作用，水力压裂的长度和高度的影响以及如何分配引起的应力。井周围的压力。为了确定透水裂缝的形成方向，使用了有限差分法和数值解的单个元素进行了模拟。结果表明，最佳的水力压裂时间是水力压裂能够将天然裂缝与大流连通并与井连通时，拉伸开口和剪切开口之间存在根本差异。分析表明，水力压裂裂缝不断扩大，拉伸应力和剪应力作用于自然裂缝。