摘要
水力喷砂射孔压裂是集射孔、压裂、隔离于一体的新型增产改造技术,适用于低渗透油藏直井、水平井的增产改造,是低渗透油藏压裂增产的一种有效方法。提出两步法计算颗粒撞击套管壁的轴向速度：首先计算单相流的稳态流场,再分析颗粒在稳态流场中的运动。计算结果表明,颗粒在流体中的轴向速度与实际情况定性符合。通过对不同间距下颗粒到达套管壁的轴向速度的计算,得出最佳喷嘴出口与套管壁之间的轴向间距为6mm。
Hydraulic jet fracturing was a new technology involved in perforating,fracturing and isolating reservoirs together.It was suitable for reconstructing and stimulation of vertical and horizontal wells in low permeability reservoirs,and it was effective method for enhancing production in low permeability reservoirs.A two-step computation method was proposed to calculate the abrasive particle axial velocity hitting with casing wall.A steady flow field of single phase flow was first computed with CFD,then particle movement in steady flow field was figured out.The results show that the axial velocity of particles is agreed with that of observations.By calculation of axial velocities of particle hitting with casing wall at different distances between nozzle and casing wall,optimal axial distance between jet nozzle and inner wall of casing is obtained.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2011年第5期115-118,337-338,共4页
Journal of Oil and Gas Technology
关键词
水力喷砂射孔
间距
CFD软件
流阻力系数
非线性微分方程
hydraulic abrasive jet perforation
optimal space
CFD software
flow drag coefficient
nonlinear differential equation
