基于流线方法的压裂水平井注水开发渗流机理研究

非常规储层采用压裂水平井技术可以获得有效的商业价值，针对低砂泥岩特低渗透油藏，通过数值模拟进行压裂水平井注水开发规律研究，运用流线方法揭示了压裂水平井注水开发渗流机理。结合数值模拟结果，根据流线形态、分布及流线与裂缝的对应关系研究了压裂水平井开发的四个流动阶段:裂缝附近线性流、垂直裂缝附近拟径向流、地层线性流和水平井拟径向流。进一步分析了不同井网形式下的压裂水平井注水开发渗流特征，为现场的开发应用提供一定的技术指导。

A Streamline-Based Study on Percolation Mechanism of Fractured Horizontal Well during Waterflooding Development

The effective commercial value of unconventional reservoirs can be expected when the fractured horizontal well technology is adopted. Aiming at the reservoirs with ultra-low permeability in the study area, the authors studied the regularity of fractured horizontal well during water-flooding development by numerical simulation, probed the percolation mechanism of fractured horizontal well during waterflooding development by streamline method. According to the form and distribution of streamline, its relationship with the fracture, together with the results of numerical simulation, the authors concluded the characteristics of four flow stages i.e. the linear flow near fracture, pseudo-radial flow near vertical fracture, linear flow in the formation, and the pseudo-radial flow in the horizontal well. The further analysis of flow mechanism of fractured horizontal well with different well patterns during waterflooding development was also conducted, which will provide practical technical guidance for the development in the future.