大分子聚合物对致密页岩CO_(2)压裂液悬砂性影响模拟  

Simulation of the Effect of Macromolecular Polymer on the Sand Suspension of CO_(2) Fracturing Fluid in Tight Shale Reservoirs

作　　者：杨宸 YANG Chen(School of Petroleum Engineering,Northeast Petroleum University,Daqing 163318,China)

机构地区：[1]东北石油大学石油工程学院,大庆163318

出　　处：《当代化工》2021年第5期1060-1063,1068,共5页Contemporary Chemical Industry

基　　金：国家科技重大专项“致密油体积压裂试井方法研究”(项目编号:2017ZX05071005)。

摘　　要：针对CO_(2)用于致密油气地层因低黏度而对支撑剂悬浮性弱的缺陷,通过聚合反应合成了一类有机大分子聚合物并进行化学表征。以多物理场耦合构筑CO_(2)压裂液中的支撑剂颗粒数值模型,以支撑剂下落速度作考察指标,研究不同因素对支撑剂在CO_(2)压裂液中的悬浮能力的影响。结果表明:大分子聚合物质量分数是CO_(2)压裂液悬砂能力改善的最重要因素,并揭示了CO_(2)压裂液悬砂能力改变的根本原因。Aiming at the weak proppant suspension of CO_(2) used in tight oil and gas formations due to its low viscosity, a class of organic macromolecular polymers was synthesized through polymerization and chemically characterized. A numerical model of proppant particles in CO_(2) fracturing fluid was constructed by multi-physics coupling, and proppant falling speed was used as an investigation index to study the effect of different factors on the proppant suspension ability in CO_(2) fracturing fluid. The results showed that the mass fraction of macromolecular polymer was the most important factor for the improvement of CO_(2) fracturing fluid’s sand suspending ability, and the root cause of the change in the ability of CO_(2) fracturing fluid to suspend sand was revealed.

关 键 词：致密储层开发 CO_(2)压裂技术 大分子聚合物 静态悬砂 多物理场耦合 

分 类 号：TQ357.1[化学工程]