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应用有限元法对影响人工压裂井生产动态的因素进行了研究,对裂缝形态和裂缝渗透率做了接近实际的描述.用于描述人工裂缝宽度的网格最小尺寸达0.1m.假设人工裂缝的形状为楔形,该形状更接近于人工裂缝的真实形态,分析对比了楔形裂缝与矩形裂缝的差别.假设裂缝内的渗透率是变化的,其数值是距离和时间的函数.在以上假设条件下讨论分析了这些因素单独和综合作用对人工压裂井生产动态的影响.结果表明,假设人工裂缝为矩形时模拟计算的产能比实际偏高,为了更加真实地描述人工裂缝井的生产动态,应同时考虑人工裂缝的形态的变化及裂缝渗透率的变化.
The factors that affect the production of artificial fracturing well are studied by using finite element method, and the fracture morphology and fracture permeability are described in a nearly realistic way.The minimum size of the grid used to describe the width of artificial fractures is 0.1m.It is assumed that artificial fractures The shape of which is closer to the true shape of the artificial fracture and the difference between the wedge fracture and the rectangular fracture is analyzed and compared.It is assumed that the permeability in the fracture varies and its value is a function of distance and time.According to the above assumptions The effects of these factors alone and in combination on the production of artificial fractured well are analyzed and discussed.The results show that in order to describe the production of artificial fractured well more truthfully when the artificial fracture is rectangular, At the same time, the change of the shape of artificial fractures and the change of fracture permeability should also be considered.