摘要
表面活性剂驱油作为3次采油中极为重要的方法,在油气开采中起着关键作用。油水界面张力值是表面活性剂驱油提高采收率的重要指标,在用旋转滴界面张力仪测定ZHX-10溶液与油相间的界面张力时,发现ZHX-10阴—非离子型表面活性剂有在高温下性能优异、低温下性能差的特性,随后采用耗散粒子动力学(dissipative particle dynamics,DPD)模拟烷氧基磺酸盐阴—非离子型表面活性剂ZHX-10溶液与油相间的微观作用情况。模拟结果表明,矿化度一定的情况下,ZHX-10在高温条件下的吸附量明显比低温条件下多;在温度不变的情况下,随着矿化度的增大,表面活性剂ZHX-10在油水界面处的吸附量逐渐增多,并存在1个最大吸附量;同时油水混合体系的能量也逐渐降低。模拟结果从侧面解释了ZHX-10为何具有高温下性能优异、低温下性能差的原因。
As an extremely important method in tertiary oil recovery, surfactant flooding plays a key role in oil and gas recovery. The oil-water interfacial tension value is an important index of surfactant flooding to enhance oil recovery. When the interfacial tension between ZHX-10 solution and oil phase was determined by rotating droplet interfacial tensimeter, it was found that the negative and nonionic surfactants of ZHX-10 had excellent performance at high temperature and poor performance at low temperature.Subsequently, the dissipative particle dynamics(DPD) was used to simulate the microcosmic interaction between the alkoxy sulfonate negative-nonionic surfactant ZHX-10 solution and oil. The simulation results showed that the adsorption capacity of ZHX-10 at high temperature was significantly higher than that at low temperature under a certain degree of mineralization. Under the condition of constant temperature, with the increase of degree of mineralization, the adsorption capacity of surfactant ZHX-10 at the oil-water interface gradually increased, and there was a maximum adsorption capacity. At the same time, the energy of the oilwater mixture system gradually decreased. The simulation results explained the reason why ZHX-10 had excellent performance at high temperature and poor performance at low temperature from one side.
作者
徐启林
杨宇
Xu Qilin;Yang Yu(College of Energy,Chengdu University of Technology,Chengdu 610059,China)
出处
《炼油与化工》
CAS
2022年第4期16-21,共6页
Refining And Chemical Industry
基金
“十三五”国家科技重大专项“大型油气田及煤层气开发”(编号:2016ZX05034-002-006、2016ZX05066003-003)。
关键词
表面活性剂驱油
耗散粒子动力学
界面张力
矿化度
阴—非离子型表面活性剂
surfactant flooding
dissipative particle dynamics
interfacial tension
degree of mineralization
negative-nonionic surfactant
