精细石油化工

针对疏松砂岩油藏孔喉尺寸大、砂粒之间胶结力弱等问题,将常规阳离子聚合物稳砂剂通过高温杂化引入纳微米颗粒增强组分,制备了颗粒杂化增强型稳砂剂。室内性能评价表明:该稳砂剂颗粒粒径中值为2.10 μm,在水中分散性好,经颗粒杂化增强型稳砂剂处理后,疏松石英砂砂粒簇粒径中值由10.71 μm扩大至220.02 μm,同时由于纳微米颗粒增强组分的加入,在疏松石英砂颗粒之间起到了较好的桥接作用,表现为孔径范围由14.07～42.98 μm降低至3.49～18.61 μm,出砂临界流速由1.00 mL/min提高至14.00 mL/min。该稳砂剂适用于疏松砂岩油藏的出砂治理。

In response to the problems of large pore throat size and weak bonding force between sand particles in unconsolidated sandstone reservoirs, a particle hybrid enhanced sand stabilizer was developed on the basis of conventional cationic polymer sand stabilizers by high-temperature hybridization and introducing nano micron particle reinforcement components. Laboratory performance evaluation shows that the median particle size of the sand stabilizer is 2.10 μm, with good dispersibility in water. After treatment with the particle hybrid enhanced sand stabilizer, the median particle size of the sand clusters increased from 10.71 μm to 220.02 μm. At the same time, the addition of the nano-micro particle reinforcement components played a good bridging role between the unconsolidated quartz sand particles, manifested by a decrease in pore size range from 0.75-2.30 μm to 0.21-1.14 μm, and an increased in critical sand production rate from 1.00 mL/min to 14.00 mL/min. This sand stabilizer is suitable for sand production control in unconsolidated sandstone reservoirs.