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首页> 外文会议>Society of Petroleum Engineers Asia Pacific Oil Gas Conference and Exhibition >Effect of Alkalis on Phase Behavior of Mixtures between Single and Double Tail Anionic Surfactants
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Effect of Alkalis on Phase Behavior of Mixtures between Single and Double Tail Anionic Surfactants

机译：碱对单尾阴离子表面活性剂与双尾阴离子表面活性剂混合物相行为的影响

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Alkaline–Surfactant–Polymer (ASP) flooding is considered as a promising method for enhanced oil recovery since 1980’s. Even though the concept of ASP is straight forward, but it is a very complicated process due to complex of chemical slug. Moreover, the success of ASP is mostly demonstrated in laboratory conditions; thus, it is necessary to investigate this process in hostile reservoir conditions for achieving a wider and successful implementation. This paper presents a comprehensive evaluation of the phase behavior of ASP systems, which is successful, the key of ASP process in high temperature reservoir. The experimental results prove that the mixtures of single tail anionic surfactant and double tail anionic surfactant would be adequately overcome the challenge of high temperature condition of reservoirs. These mixtures are also more compatible with polymer and increase the optimum salinity. In other words, the developing of new advanced surfactant mixture allows apply ASP flooding in high salinity reservoir. Next, we examine the important role of alkaline in ASP process. Three alkalis such as including sodium carbonate, sodium metaborate, and sodium metasilicate were tested in phase behavior experiments at high temperature condition (90C) for both synthesis (dodecane) and crude oils. The results indicate that alkaline in the ASP systems can react with some acidic components of the crude oil to form in-situ surfactant, which then would help lowering the IFT between oil and water phases. It reduces the cost of process because alkaline is cheaper than synthesis surfactant. Besides alkaline also affect on interfacial tension and phase behavior of ASP systems.
机译：碱性表面活性剂 - 聚合物（ASP）洪水被认为是自1980年代以来提高储油的有希望的方法。尽管ASP的概念直截了当，但由于化学槽的复杂是一种非常复杂的过程。此外，ASP的成功主要在实验室条件下证明;因此，有必要在敌对储层条件下调查这一过程，以实现更广泛和成功的实施。本文介绍了ASP系统的相位行为的综合评价，这是成功的，高温储层中的ASP过程的关键。实验结果证明，单尾阴离子表面活性剂和双尾阴离子表面活性剂的混合物将得到充分克服储层高温条件的挑战。这些混合物也与聚合物更加相容，并增加最佳盐度。换句话说，新的高级表面活性剂混合物的显影允许在高盐度储层中应用ASP洪水。接下来，我们研究碱性在ASP过程中的重要作用。在合成（十二烷）和原油的高温条件（90℃）的相位行为实验中，在高温条件（90℃）的相行为实验中测试三种碱如碳酸钠，即碳酸钠和碳酸钠。结果表明，ASP系统中的碱性可以与原油的一些酸性组分反应，以形成原位表面活性剂，然后将其有助于降低油和水相之间的IFT。它降低了过程的成本，因为碱性比合成表面活性剂便宜。除了碱性还影响ASP系统的界面张力和相行为。

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