塔里木油田博孜大北凝析气井无机-有机复合沉积实验研究

Experimental study on inorganic-organic composite deposition in Bozi Dabei condensate gas well in Tarim Oilfield

基于相似原理,设计与现场井筒尺寸几何相似的细管,使用现场凝析油样和蜡样配制模拟凝析油样品,并以不同粒径范围的砂样模拟井筒出砂,开展了砂样颗粒对模拟凝析油析蜡过程影响的研究。结果表明,在砂样粒径0.109~0.850mm的范围内,随着加入砂量从1%~9%的增加,蜡的沉积量不断增加,并且蜡的沉积量均随着砂样粒径的增大而增加。当析蜡温度由50℃降低到40℃时,各加砂量条件下的蜡沉积量均有明显增加;当模拟凝析油含蜡量由10%增加到13%时,各加砂量条件下的蜡沉积量均有明显增加。研究结果对现场无机-有机复合解堵剂的研制和筛选具有一定的指导意义。

Based on the similarity principle,a thin tube with similar size and geometry to the field wellbore was designed.Simulated condensate oil samples were prepared by using field condensate oil samples and wax samples,and sand samples with different particle sizes were used to simulate wellbore sand production.The influence of sand sample particles on wax deposition process of simulated condensate oil was studied.The results showed that in the particle size range of 0.109~0.850mm,with the increase of sand content from 1%to 9%,the amount of wax deposition increased continuously,and the amount of wax deposition increased with the increase of sand particle size.When the temperature of wax deposition decreased from 50℃to 40℃,the amount of wax deposition increased obviously under different sand addition conditions;When the wax content of simulated condensate oil increased from 10%to 13%,the amount of wax deposition increased obviously under different sand addition conditions.The research results had certain guiding significance for the development and screening of inorganic-organic compound plugging remover in site.