中文摘要：

随着越来越多致密油藏投入开发，致密油藏开发已经成为国内外的热点。建立了多级压裂水平井渗流数学模型，编制了三维三相致密砂岩非线性渗流数值模拟模型。利用成熟商业软件对开发的新模型进行了验证。对实际生产井进行了历史拟合，对裂缝导流能力、改造区域规模、改造区域渗透率、非线性系数、初始压力等参数进行了分析。结果表明：开发的新模型能够对致密油藏多级压裂水平井进行有效地模拟，并反映致密油藏渗流的非线性特征。适当增加裂缝导流能力、增大改造区域、改造区域渗透率能够减小近井周围流动阻力，增大产能，而非线性系数增加了流体流动阻力，减小了产能。

英文摘要：

With further progress of oilfield development all over the world,more and more tight oil reservoirs are being put in production. This paper established a mathematical model of multistage fracturing horizontal wells,and the multistage fractured horizontal well numerical simulation software was developed. The new software is verified by using the commercial software Eclipse. We matched the actual production data using this new software. Analysis was made about the fracture conductivity, SRV volume,SRV permeability,nonlinear coefficients,and initial pressure. Results show that the new software can effectively simulate multistage fracturing horizontal wells in the tight oil reservoir and reflect the nonlinear flow features. In order to increase productivity,the fracture flow capacity,SRV volume,and SRV permeability should be appropriately increased. On the other hand,the non-Darcy flow decreases the well productivity.