【作者】 仲强；

【导师】 卢祥国；

【作者基本信息】 大庆石油学院 ， 油气田开发工程， 2007， 硕士

【摘要】 三元复合体系是将注入水与表面活性剂、碱和聚合物的混合物,化学试剂的加入可以增加注入水黏度、降低油水界面张力。三元复合驱不仅可以改善驱替相与被驱替相间流度比,还能够大幅度提高驱油效率。大庆油田三元复合驱先导性和工业化矿场试验表明,三元复合驱是一种行之有效的提高采收率方法,是油田可持续发展的重要技术保障。但在三元复合驱矿场试验和应用过程中也暴露出一些制约矿场试验效果和大规模推广应用的技术难题,如三元复合驱所引起的注采设备腐蚀、结垢和采出液乳化等。所以,减小或消除三元复合驱过程中腐蚀和结垢问题具有十分重大的现实意义。SJT-B是一种新开发的缓蚀防垢化学助剂,其缓蚀防垢和降低界面张力效果还需要室内实验结果加以验证。本文利用仪器分析方法,对SJT-B助剂的缓蚀防垢、降低界面张力和驱油效果进行了系统研究。结果表明,SJT-B缓蚀防垢效果明显,有关指标达到了行业标准。“表面活性剂/SJT-B助剂/聚合物”三元复合体系与大庆油田第二采油厂原油间可以实现超低界面张力,并具有降低界面张力浓度范围宽、幅度大和稳定性好等特点。SJT-B的缓蚀防垢和降低界面张力性能评价,为其尽快投入矿场应用提供了实验依据。更多还原

【Abstract】 Alkali/surfactant/polymer (ASP) flooding is mixture of injective water, surfactant, alkali and polymer. The injection of chemical agent can increase the viscosity of the injective water and decrease oil and water interface tension. ASP flooding is does not only improving the fluid ratio of displacing phase and displaced phase, but also enlarging the efficiency of displacing oil. Forerunner and industry polite test of Daqing oilfield ASP flooding show that ASP flooding is an effective method to enhance oil recovery, and also is an important technique safety of oilfield durable development. But in the progress of application and polite test of ASP flooding, these exposes technique puzzles that limit the polite test effect of ASP flooding and further application at a large scale, which are the injection and production equipment erosion, encrustation and the emulsification of producing water. So, there is very important practical significance to decrease and eliminate erosion and encrustation problems in the progress of ASP flooding. SJT-B is a new kind of chemical agent that using decreasing erosion and encrustation proof, whose effect of decreasing erosion and protecting encrustation and decreasing interface should be verified by the experimental results. Making use of the instrumental analysis method, the paper does some system study on encrustation proof, decreasing the interface tense of SJT-B agent and the effect of displacing oil. The results show that the effect of SJT-B is obvious and some index have reached trade standard.“Surfactant, SJT-B auxiliary agent and polymer”ASP flooding and the oil of Plant two in the Daqing Oilfield can reach the ultra low interface tense, and have the characteristics of decreasing the scope of concentration of interface tense is wide, the scope is large and the stability is better. The property evaluation of encrustation proof and decreasing interface tense of SJT-B provide the experimental dependence for polite application.更多还原