摘要
研究射孔损害区的存在对流量特性的影响以及其它流量流动的影响因素对提高射孔器的质量和提高射孔完井效率具有重要实际意义。利用ANSYS程序对贝雷砂岩射孔孔道的流量进行了数值模拟研究,数值计算的流量结果与实验结果符合较好。得到了轴向和径向流动在无损害区和含损害区时压力、速度矢量、轴向速度和径向速度分布情况,得到了射孔损害区厚度、流体粘度、射孔损害区内渗透率下降百分数、压差及岩石固有轴向和径向渗透率、射孔孔道形状五种因素对轴向和径向流量的影响规律。计算分析结果表明孔深对流量的影响最大,损害区厚度、渗透率下降程度和孔深基本一致时,流量主要取决于岩芯靶板的原始渗透率性能。
Study the effect of damage zone on the flow rate of perforation tunnel and other flow rates is important to the increase in perforation efficiency.The flow rate of Berea sandstone tunnel was numerically simulated by using ANSYS.The calculated result is in good agreement with the experimental result.The pressure,radial velocity and axial velocity distributions of radial flow and axial flow were obtained both on non-damage Berea sandstone and on damage zone.The result shows that the flow rate of perforation tunnel was affected by perforation depth,perforation diameter,decrease in permeability,the thickness of damage zone,and differential pressure,etc.The analysis result shows that the perforation depth has the most effect on flow rate.The flow rate is dependent on original permeability while the thickness of damage zone,decreasing degree of permeability and the perforation depth were almost close to each other.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2009年第S2期19-23,共5页
Acta Armamentarii
关键词
射孔孔道
岩芯流量
损害区
有限元分析
perforation tunnel
flow rate
damage zone
element analysis
