支撑剂长期导流能力实验研究

Experimental research on long-term conductivity of different supports

结合长庆油田低渗透油藏特征,通过支撑剂充填裂缝长期导流能力实验,研究了支撑剂类型、粒径和不同粒径的支撑剂组合对裂缝导流能力的影响。实验结果表明,每种类型的支撑剂和不同支撑剂组合的导流能力随时间都有明显的下降趋势,其中陶粒的导流能力明显高于石英砂和树脂砂;裂缝的导流能力随着支撑剂粒径的增加而降低;10/20目、20/40目和40/60目3种支撑剂组合时其比例为1:3:1时导流能力随时间变化的幅度较小,在实验结束时导流能力最大。

Based on the characteristics of low permeability reservoirs in Changqing oilfield,the effects of proppant type,particle size and proppant combination with different particle size on fracture conductivity were studied by the long-term conductivity test of proppant filling fracture.The experimental results show that the conductivity of each type of proppant and different proppant combinations decreases with time.And the conductivity of ceramsite is obviously higher than that of quartz sand and resin sand.The conductivity of cracks decreases with the increase of proppant particle size.And the three proppant groups of 10/20 mesh, 20/40 mesh and 40/60 mesh,when the ratio is 1:3:1,the diversion capacity changes little with time, and is the largest at the end of the experiment.