摘要
致密砂岩油藏水平井生产过程中的流体渗流过程具有明显的非达西流特征。在考虑启动压力梯度和应力敏感性的基础上,应用平均质量守恒定律和压降叠加原理推导出了致密砂岩油藏水平井的三维不稳定渗流压力分布公式。应用镜像反映理论可以得到该模型在不同边界条件下的水平井渗流过程描述和各有关参数的解,具有很强的实用性。同时,分析了启动压力梯度和应力敏感性对储集层中流体渗流的影响,给出了不同启动压力梯度和渗透率变形系数下的水平井压力分布。
Fluid seepage process in horizontal wells production of tight oil reservoir shows obvious non-Darcy lfow characteristics. Based on initiating pressure gradient and stress sensitivity, law of conservation of mass and pressure drop superimposition principle were used to infer the unsteady seepage lfow pressure distribution equation for horizontal wells in tight sandstone reservoirs. The characteriza-tion of the seepage lfow process of horizontal wells under different boundary conditions and the solution of relevant parameters can be obtained for this model by using mirror relfection theory, which is very practical. Meanwhile, the effect of initiating pressure gradient and stress sensitivity on lfuid seepage in reservoirs was analyzed, which resulted in pressure distribution in horizontal wells under different initiating pressure gradient and permeability coefifcient of deformation.
出处
《石油钻采工艺》
CAS
CSCD
北大核心
2014年第5期65-68,共4页
Oil Drilling & Production Technology
基金
国家863项目"致密砂岩油气藏数值模拟技术与软件"(编号:2013AA064902)
关键词
致密油藏
水平井
不稳定渗流
压力分布规律
tight oil reservoir horizontal well unsteady seepage lfow regularities of pressure distribution
