为解决水平井分段改造和均衡层间产气差异的难题,从岩石细观力学角度出发,建立了岩石渗流-应力-损伤耦合模型(FSD模型);考虑岩石的非均质性,应用弹性有限元法作为应力分析工具,计算分析岩石的应力场和位移场,对水压裂缝的萌生、扩展过程中渗透率演化规律及其渗流-应力耦合机制和渗流与损伤耦合机制进行模拟分析。采用基于储层特征、完井方式、流体性质及油藏数值模拟等综合信息的Multi Well Simulator开放式软件平台,通过定义损伤断裂延伸准则和FSD模型方程,可以实现油藏数值模拟和FSD动态耦合分析。以D403-2H井为例,建立地质模型-数值模型-FSD模型,对射孔参数、措施层段、分段工具位置等进行优化,对合理划分措施井段和调整产气剖面进行研究。现场应用结果表明,该技术能够有效解决层间矛盾突出的水平井的层间储量动用不均衡的问题。 In order to solve the problem of horizontal well section reforming and equalizing the difference of gas production between layers, the seepage-stress-damage coupling model (FSD model) of rock is established from the perspective of rock meso-mechanics. Considering the rock heterogeneity, The finite element method is used as stress analysis tool to calculate and analyze the stress field and displacement field of rock. The permeability evolution law, seepage - stress coupling mechanism and coupling mechanism of seepage and damage during the initiation and propagation of hydraulic fractures are simulated. Based on the Multi Well Simulator open software platform based on comprehensive information of reservoir characteristics, completion methods, fluid properties and reservoir numerical simulation, the numerical simulation of reservoir and FSD dynamic coupling can be realized by defining the damage fracture extension criterion and the FSD model equation analysis. Taking D403-2H well as an example, a geological model-numerical model-FSD model was established to optimize perforation parameters, measure intervals and segmented tool positions, and to study the reasonable division of intervals and adjustment of gas production profiles. The field application results show that this technique can effectively solve the problem of unbalanced utilization of interlayer reserves in horizontal well with contradiction between layers.