成膜型控砂剂的分子模拟、制备及性能评价

Molecular Simulation，Synthesis and Performance Evaluation of Film-forming Sand Control Agent

宋金波 汪庐山 李常友 武明鸣 魏庆彩

SONG Jinbo WANG Lushan LI Changyou WU Mingming WEI Qingcai

成膜型控砂剂有效期取决于其在储层孔隙表面的吸附性能。为了延长成膜型控砂剂有效期，采用分子力学与蒙特卡洛相结合的方法研究了不同阳离子化合物在岩石表面的吸附性能，根据分子模拟结果设计和制备了两亲型有机阳离子聚合物作为新型成膜型控砂剂，研究了成膜型控砂剂的耐冲刷性能，并在胜利油田进行了现场应用。模拟计算结果表明，二酸类单体己二酸（HDA）、二胺类单体对环己二胺（DM1）与水互溶差而与油互溶性好，HDA-DM1型聚酰胺链段具有较好的吸附性能，在石英上的吸附能为-56.34 kcal/mol，热力学和机械性能较好。按照HDA-DM1结构合成的嵌段型高分子控砂剂具有良好的耐冲刷能力，耐冲刷性能高于标准要求的3倍以上。成膜型控砂剂在胜利油田应用达10口井，控砂效果较好，控砂有效期长。图2表2参12

The effective period of film-forming sand control agent depended on the molecular adsorption performance onto the surface of reservoir rock. In order to prolong the effective period of film-forming sand control agent，the adsorption performance of some cationic compounds onto the rock surface was simulated by combining molecular simulation with Monte Carlo method.According to the results of molecular simulation，the amphiphilc cationic polymer was designed and synthesized as a new film-forming sand control agent. The erosion resistance performance of film-forming sand control agent was studied，and it was implemented in Shengli oilfield. The results of simulation computation showed that hexane diacid monomer （HDA） and cyclohexane diamine monomer could not be well dissolved in water，but could be well dissolved in oil. HDA-DM1 polyamide chain had relatively good adsorption performance with -56.34 kcal/mol adsorption energy on the surface of quartz，indicating good thermal and mechanical performance. The core flooding experiment results showed that HDA-DM1 had good wash-resistant ability which was 3 times higher than that of standard requirement. The film-forming sand control agent was applied on 10 wells successfully，the sand control effect was obvious and the sand control life extended.

10.19346/j.cnki.1000-4092.2019.02.011