【作者】 马克新；

【导师】 吴文祥；

【作者基本信息】 东北石油大学 ， 油气田开发工程， 2011， 硕士

【摘要】 我国的复合驱技术已走在世界前列,目前,三元复合驱虽已进入工业化应用阶段。室内和矿场研究表明:三元复合体系采收率可以在水驱基础上提高20%以上。特别是“十一五”期间,三元复合驱将成为确保大庆油田高产,稳产的重要措施之一。但三元复合驱所带来的采出液处理困难以及对地层造成损害等问题很大程度上限制了三元复合驱推广。表面活性剂—聚合物二元复合驱（SP复合驱）由于能够发挥表面活性剂和聚合物各自的最大优点,成为复合驱的发展方向之一。在SP复合驱中,获得无碱条件下仍能与大庆原油形成10^-3mN/m超低界面张力的稳定的表面活性剂是关键。针对此问题本文主要对无碱驱油体系用表面活性剂羟基磺基甜菜碱及其复配体系界面特性进行了系统评价,并对优选出的表面活性剂进行了吸附实验、稳定性实验及驱油物理模拟实验研究。同时探讨了表面活性剂浓度、聚合物浓度、聚合物分子量、矿化度等对羟基磺基甜菜碱表面活性剂体系界面特性的影响;考察了以B及B与SB8复配体系为表面活性剂的SP二元和ASP三元复合体系在大庆油田条件下的岩心驱油效果。这一研究为大庆油田进行表面活性剂/聚合物二元体系驱油工业化推广提供试验及应用依据。研究结果表明:单一B表面活性剂能有效降低大庆一厂油水界面张力,使0.3%、0.1%、0.02%、0.05%四点的界面张力都达到了超低10^-3mN/m;B样品在加入大庆炼化生产的1900万分子量聚合物,浓度为1500PPM时,在较宽的活性剂浓度范围内均可使大庆油田采油一厂油水界面张力达到超低(<10^-3数量级);聚合物的分子量,浓度都对界面张力影响很大;0.2%浓度的B样品稳定性很好,测试180天中的界面张力数据几乎在（5.0⁶.0）×10^-3mN/m之间;聚合物对重烷基苯石油磺酸盐的吸附影响较小,而甜菜碱和聚合物复配时,对吸附量有一定的影响;摸索出两种甜菜碱样品B与SB8复配适合大庆采油一厂的复配比例,同时在B与SB8复配下,加入聚合物,使界面张力达到了10^-3mN/m超低界面张力;综合所有均质和非均质岩心的实验结果并通过分析,我们推荐,在渗透率为300×10^-3μm²和150×10^-3μm²岩心上采用BS无碱二元体系和氢氧化钠强碱三元体系,在渗透率为50×10^-3μm²的岩心上采用BS无碱二元体系。更多还原

【Abstract】 The technology of combination flooding has advanced in the world in our country. At present, ASP flooding has entered into the stage of industrial application. The results of laboratory and fields tests show that the recovery of ASP system can be increased by more than 20% on the basis of water flooding. Especially during the period of the“Eleventh Five-Year”, ASP flooding will become one of the important measures that ensure a high and stable yield in Daqing oil field. However, the problems brought by itself limited the promotion of ASP flooding, that the difficulties to deal with produced fluid and the damage to the formation. Surfactant-polymer binary flooding （SP flooding） becomes one of the aims in combination flooding because the surfactant and the polymer can develop their biggest advantages. In the SP flooding,the key is find a steady surfactant that can reach a ultra-low-tension of 10^-3mN/m with Daqing crude in alkali-free condition.In this paper, it mainly evaluates the interfacial characteristics of the hydroxy sulfosalicylic betaine surfactant and its compound systems to apply in alkali-free displacement, we found the optimum surfactant to do the experiment of adsorption, stability and the research on physical simulation experiment of oil displacement. Moreover, the text investigate the influence of surfactant concentration、polymer concentration、polymer molecular weight and salinity on the hydroxy sulfosalicylic betaine surfactant; inspect the rock core displacement characteristics of SP binary system and ASP ternary system which use B,B&SB8 binary system under the condition of DaQing oil field.The results show that: the single B surfactant can effectively reduce the oil-water of one plants in Daqing, when the concentrations are 0.3%,0.1%,0.02% and 0.05%, the interfacial tension reached a ultra-low-tension of 10^-3mN/m; Sample B could make the oil-water interfacial tension of one plants in Daqing reach a ultra-low-tension (<10^-3mN/m,orders of magnitude) in a wide range surfactant concentration by adding in 19 million molecular weight polymer produced by Daqing Oil Refining and Chemical Company when the concentration of polymer is 1500PPM; the molecular weight and concentration of polymer have a great influence on the interfacial tension; Sample B in 0.2% concentration is steady, the interfacial tension was almost between （5.0⁶.0）×10^-3mN/m; the polymer had a little influence on the adsorption of SY, and had some influence when betaine and polymer compound; we explored two kinds of proportion in Sample B and SB8 which can make the oil-water interfacial tension of one plants in Daqing reach a ultra-low-tension of 10^-3mN/m adding in the polymer; analyzed the experimental results, we recommend to use BS alkali-free binary system and NaOH ternary system on rock core which percolation rate is 300×10^-3μm²and 150×10^-3μm², and use BS alkali-free binary system on rock core which percolation rate is50×10^-3μm².更多还原