用于裂缝性地层的体膨颗粒钻井液堵漏剂TP-2的制备与性能研究

Preparation and Performance Study of TP-2 Drilling Fluid Plugging Agent with Swellable Particle for Fractured Reservoir

吴轩宇 任晓娟 李 盼 雷 喆

WU Xuanyu REN Xiaojuan LI Pan LEI Zhe

为解决裂缝性地层钻井过程中常规桥塞堵漏材料堵漏效果不佳与堵漏后发生重复性漏失的问题， 以丙烯酰胺、 丙烯酸为共聚单体， 过硫酸钾和亚硫酸氢钠为氧化还原引发剂， 以N，N-亚甲基双丙烯酰胺为化学交联剂、锂皂石为物理交联剂， 采用溶液聚合法合成了体膨颗粒钻井液堵漏剂 TP-2， 研究了 TP-2的形态结构、 吸水膨胀性、 保水性、 堵漏性及其对钻井液性能的影响。结果表明： TP-2为不规则的颗粒， 平均粒径为 190.5 μm， 与钻井液的配伍性较好， 形成的屏障层承压能力可达11 MPa； TP-2吸水膨胀性和保水性良好， 80℃下的膨胀倍数为75 g/g、保水率为 38.4%； 温度对 TP-2的影响较大， 随温度升高， TP-2吸水膨胀倍数增加、 保水率降低。该体膨颗粒堵漏剂适用于 80℃以下的裂缝性油藏的防漏堵漏。图6表1参13

In order to resolve the poor plugging performance of conventional bridge plug sealing material and the problem of repetitive leakage in drilling process of fractured reservoir，a kind of swellable particle plugging agent TP-2 was synthesized by aqueous solution polymerization，using acrylamide and acroleic acid as comonomers，potassium persulfate and sodium bisulfite as initiators，methylene-bis-acrylamide as chemical crosslinker and hectorite as physical crosslinker. The morphological structure，swelling property，water retention property，plugging performance and the effect of TP-2 on the property of drilling fluid were studied. The results showed that TP-2 was a kind of irregular particle and the initial average particle size was 190.5 μm. The plugging agent had good compatibility with drilling fluid. The swellable particle plugging agent sealed the permeable sands effectively with the maximum bearing pressure 11 MPa. TP-2 had good swelling property and water retention property. The expansion ratio was 75 g/g at 80℃ and the water retention rate was 38.4%. Temperature had a great influence on TP-2. The higher temperature，the better swelling property and the lower water retention of TP-2 was. The swellable particle plugging agent was suitable for the plugging of fractured reservoir under 80℃.

10.19346/j.cnki.1000-4092.2016.06.001