基于疏水改性的超低密度控水支撑剂制备及其性能

Preparation and Performance of Ultra-low Density Water-controlling Proppant Based on Hydrophobic Modification

史 斌 苏延辉 邢洪宪 郑晓斌 耿学礼

SHI Bin，SU Yanhui，XING Hongxian，ZHENG Xiaobin，GENG Xueli

针对常规陶粒支撑剂密度高且不具备控水性能的问题，先将超低密度有机支撑剂基体的表面进行高温氧化使其表面产生活性基团，然后通过全氟羧酸在活化支撑剂表面通过亲核加成反应合成超疏水层得到超低密度控水支撑剂，评价了该支撑剂的润湿性、阻水性能及油水相渗流性能，并进行了现场应用试验。研究表明，水在该支撑剂表面的接触角达到158.6°，阻水高度为25 cm，与改性前相比地层水渗流阻力增加40%，具有明显的选择性控水效果，且耐冲刷性能优异。超低密度控水支撑剂现场试验充填率达到了100%，且投产后含水率及含水上升速率远低于邻井，产油量显著好于邻井，显示了很好的应用前景。

Aiming at the problem of high density and no water control effect of conventional ceramsite proppants，the surface of the ultra-low-density organic proppant（ULDOP）matrix was oxidized at a high temperature to generate active groups on the surface，and then the nuleophilic addition reaction of the activated ULDOP and perfluorocarboxylic acid was carried out to obtained an ultra-low-density water-controlling proppant（ULDWCP）. The wettability，water resistance and oil-water phase percolation properties of the ULDWCP were evaluated，and the field application tests were carried out. The results showed that the contact angle of water on the surface of the ULDWCP reached up to 158.6°，and the water blocking height was 25 cm. Compared with before modification，the seepage flow resistance of the formation water increased by 40% ，indicating obvious selective water controlling effect，and the erosion resistance of ULDWCP was excellent. The filling rate of the ULDWCP in field test had reached up to 100%，and the water cut and the rising rate of water cut after production were far lower than those of adjacent wells，and the oil production was significantly higher than that of adjacent wells，showing a good application prospect.

10.19346/j.cnki.1000-4092.2022.03.004