【作者】 陶磊； 李兆敏； 李兵；

【Author】 TAO Lei LI Zhao-min JIANG Rui-zhong (College of Petroleum Engineering,China University of Petroleum,Dongying,257061,China)

【机构】 中国石油大学(华东)石油工程学院； 中国矿业大学资源与地球科学学院；

【摘要】 实践证明利用水平井开采低渗透油藏是一种十分有效的开发方式．在低渗透多孔介质中,渗流不再符合线性达西定律,而具有启动压力梯度,本研究将水平井的三维渗流简化为水平平面和垂直平面的两个二维流动,考虑启动压力梯度的影响,对水平井两相渗流进行了分析．得到了椭圆形供油半径中水平井稳态产能公式,同时该公式考虑了水平井偏心距、油藏非均质性．经计算分析得出结论：水平井日产油量与水平井段长度呈线性增加关系；水平井日产油量随启动压力梯度增大而减小；油藏非均质性越强水平井日产油量越小．更多还原

【Abstract】 According to the survey,it is a great powerful technique to exploit low permeability reservoir by horizontal wells.In the porous media,Seepage flow doesn’t fit Darcy Equation, however it has threshold pressure gradient,in the essay,the 3D flow is subdivided to two 2D flow including oil flow into a horizontal well in a horizontal plane and oil flow into a horizontal well in a vertical plane.Oil and Water two-phase flow and reservoir threshold pressure gradient are also considered.The essay determines the influence of lateral length of well,reservoir threshold pressure gradient and reservoir anisotropy on horizontal well productivity.The results indicate that lateral length of well,low or non threshold pressure gradient and high vertical permeability is suitable for horizontal productivity.更多还原