进行了实验室研究,以辨明在复合的化学驱替中观察到的碱和聚合物间良好协合作用的机理,工作的焦点是缓冲碱,纯碱的应用。利用David Lloydminster油和盐水所作的岩心驱替试验对力学作用作了研究。要最有效地应用这一方法,需要同时注入碱和聚合物。这样做可以通过降低界面张力使残余油活化,和通过形成集油带有效地驱油。集油带的形成是碱—聚合物方法的一个非常重要的特性。碱预冲液(即碱注入先于聚合物注入)在这些工艺过程中将导致采收率减小,这是由于预冲液从油中除去了能生成表面活性剂的物质,在随后的聚合物注入时不能降低界面张力。岩心驱替试验也用以评估作为Alberta东部Wainwright油田三次采油方法的碱—表面活性剂—聚合物驱替。Wainwright原油和Wainwright盐水之间相特性和界面张力,以及几种表面活性剂类型的确定,有助于选择用于岩心驱替的最佳化学段塞。根据岩心矿物学,化学物质扩散和乳化作用,对取得较高三次采油采收率的Berea砂岩岩心塞和保存的储层岩心塞作了对比研究。也将研究结果与使用烧碱(来添加表面活性剂和流度控制剂)的早期研究作了比较。结果表明,碱—表面活性剂—聚合物驱替,对Wainwright油田可能是合适的三次采油方法,也说明了在储层岩心中进行岩心驱替试验的重要性。对于Berea砂 Laboratory studies were conducted to discern mechanisms of the synergistic effect of the alkali and the polymer observed in the composite chemical flooding. The focus of the work was on the use of buffered and soda ash. Mechanics were investigated using core displacement tests by David Lloydminster oil and brine. To use this method most effectively, it is necessary to inject both the base and the polymer. Doing this activates the residual oil by reducing the interfacial tension and effectively displaces the oil by forming an oil collection belt. The formation of the oil strip is a very important property of the alkali-polymer process. Alkaline priming (ie, alkali injection prior to polymer injection) will result in a decrease in oil recovery during these processes, as the priming fluid removes the surfactant-generating species from the oil and, in the subsequent polymerization Injecting can not reduce the interfacial tension. Core flooding tests were also used to evaluate alkali-surfactant-polymer flooding as a third oil recovery method for the Wainwright field in eastern Alberta. Phase properties and interfacial tensions between Wainwright crude oil and Wainwright brine, as well as the determination of several surfactant types, help to select the best chemical slug for core flooding. Based on the core mineralogy, chemical diffusion and emulsification, Berea sandstone core plugs and reservoirs core plugs with the higher third oil recovery were compared. The results were also compared with earlier studies using caustic soda (to add surfactants and flow control agents). The results show that alkali-surfactant-polymer flooding may be a suitable tertiary recovery method for the Wainwright field and also illustrates the importance of core flooding experiments in reservoir cores. For Berea sand