一种耐温抗盐的油基超分子体系的驱油性能研究  

Study on oil displacement performance of a temperature-resistant and salt-resistant oil-based supramolecular system

作　　者：鞠野[1] 瞿瑾 李翔[1] 刘丰钢[1] 李晓伟 王硕 马馨茹 刘晓非[2] JU Ye;QU Jin;LI Xiang;LIU Fenggang;LI Xiaowei;WANG Shuo;MA Xinru;LIU Xiaofei(China Oilfield Services Limited,Tianjin 300450,China;School of Materials Science and Engineering,Tianjin University,Tianjin 300350,China)

机构地区：[1]中海油田服务股份有限公司,天津300450 [2]天津大学材料科学与工程学院,天津300350

出　　处：《化学工业与工程》2023年第4期102-110,共9页Chemical Industry and Engineering

摘　　要：聚合物微球具备注入爬升压力低、深部运移效果好、耐温耐盐及成本较低等特点,作为一项新型纳米调驱技术,在石油三采领域有广阔的应用前景。聚丙烯酰胺微球乳液作为常用的驱油剂,在温度和矿化度较高的条件下无法在该类油藏条件下取得较好的驱油效果,因此,对非聚丙烯酰胺类新型油基超分子体系的研究十分有必要。选用油田常用的50、100 nm聚丙烯酰胺微球,以及油基超分子微球进行对比研究,在分析和观察其粒径、团聚行为、黏度以及毛细管内油水传质行为和降低界面张力作用的基础上,通过微观可视油滴剥离实验,研究了温度、表面活性剂对聚合物微球原油油滴剥离作用的影响。通过标定不同微球在原油油滴剥离过程中产生的外接触线的移动速度,定量分析了不同种类微球剥离油滴的微观作用效果。结果显示,聚合物微球与表面活性剂有协同作用,可大大提高剥离油滴的速度。在这3种微球中,油基超分子微球体系具有较好的耐温抗盐性能,剥离油滴的效果最好,50 nm微球次之,100 nm微球的剥离效果最差。因此,油基超分子体系是一种具有良好发展前景的新型驱油体系。Polymer microspheres have the characteristics of low injection climbing pressure,good deep migration effect,temperature resistance and salt resistance,and low cost.As a commonly used oil dis-placement agent,polyacrylamide microsphere emulsion cannot achieve good oil displacement under such reservoir conditions of high temperature and salinity.Therefore,it is necessary to study the new oil-based supramolecular systems of non-polyacrylamide.In this paper,50 nm and 100 nm polyacrylamide micro-spheres commonly used in oilfields and oil-based supramolecular microspheres are selected for compara-tive research.In the analysis and observation,the particle size,viscosity,and agglomeration behavior of the polymer microspheres,the oil-water mass transfer behavior in the capillary,and the interfacial tension reduction of each sample,the effects of temperature and surfactant on the peeling of crude oil droplets of polymer microspheres were studied through microscopically visible oil droplet exfoliation experiments.By calibrating the moving speed of the outer contact line generated by different microspheres during the peel-ing process of crude oil droplets,the microscopic effect of different types of microspheres peeling off oil droplets was quantitatively analyzed.The results show that the polymer microspheres and the surfactant have a synergistic effect,which can greatly improve the speed of stripping oil droplets.Among these three kinds of microspheres,the oil-based supramolecular microsphere system has better temperature resistance and salt resistance,and the effect of stripping oil droplets is the best,followed by 50 nm microspheres,and 100 nm microspheres had the worst peeling effect.Therefore,the oil-based supramolecular system is a new type of oil displacement system with good development prospects.

关 键 词：油基超分子微球 油滴剥离 驱油 协同作用 

分 类 号：TQ317.4[化学工程—高聚物工业] O631.3[理学—高分子化学]