摘要
依据压裂水平井不同流动区域的流动规律,将压裂水平井的渗流分为裂缝中的高速非达西流动区、裂缝控制影响的椭圆渗流区、远离裂缝的基质非达西渗流区,考虑启动压力梯度的影响,对压裂水平井两相渗流进行了分析,得到了低渗透油层压裂水平井的产量公式.研究结果表明,裂缝的导流能力越大,压裂水平井的产量越高.但随着开采时间的增加,其产量递减幅度越大;压裂裂缝长度越小,压裂水平井的初始产量越高.但随着生产时间的推移,压裂裂缝的长度越大,产量的递减幅度越小;中间裂缝长,两翼裂缝短的情况下,压裂水平井的产量最高.
According to flow characteristics of different flow areas of fractured horizontal wells in low permeability oil reservoirs,the vadose region of fractured horizontal wells can be divided into three districts,the non-Darcy flow district with a high speed controlled by cracks,the ellipse flow district and the matrix non-Darcy flow district.Two-phase porous flow mathematical models of matrix non-Darcy flow with start-up pressure gradient are built.The results indicate that the production goes with the increase of fracture conductivity;the incremental scope of production decreases with the increase of production time;initial production of fractured horizontal decreases progressively with the increase of fracture length,the incremental scope of production decreases with the increase of fracture length;the production of fractured horizontal wells is the maximum in the situation with a long median crack and a short two-way crack.
出处
《力学与实践》
CSCD
北大核心
2011年第1期66-69,共4页
Mechanics in Engineering
基金
中石油股份公司项目资助(020132-1-2)
关键词
压裂水平井
两相渗流
裂缝
低渗透
fractured horizontal well
two-phase flow
fracture
low permeability
