筛网式滤砂管挡砂效果室内试验

为了提高筛网式滤砂管防砂效果,研究如何优选挡砂层(密纹网)提高防砂效果。采用多点测压岩心流动出砂试验装置,系统研究了筛网式滤砂管挡砂层(密纹网)层数、排列角度、放置顺序以及地层砂非均质性、细粉砂(粒径小于0.05 mm)质量分数等对挡砂精度和防砂效果的影响。研究结果表明,均质性地层砂密纹网挡砂精度ω≤0.8d50、非均质性地层砂密纹网的挡砂精度ω≤0.65d50时,采出液中的含砂量小于0.03%。通过对影响筛网式滤砂管挡砂精度的技术参数评价与优化,为提高疏松砂岩油藏筛网式滤砂管的防砂效果提供了理论依据。 

Laboratory Testing of Sand Control Effect for Mesh Type Screen

To improve the effect of sand control of mesh type screen,the way to select sand blocking layer(fine mesh)was studied.Core sand flow test device with multi-point pressure measurement was established,and the effect of layer number,arrangement angle,setting order,sand heterogeneity and fine silt(particle size less than 0.05mm)mass fraction on sand blocking accuracy and sand control results were studied systematically.The results showed that,when the fine mesh sand control precision wasω≤0.8d50 in homogeneous sand andω≤0.65d50in heterogeneous sand,the sand content in produced liquid was less than the industrial standard of 0.03%.The evaluation and optimization of technical parameters affecting sand control accuracy of the mesh type screen provided theoretical basis for improving sand control of mesh type screen.