Polyetheramine as an alternative alkali for alkali/surfactant/polymer flooding
作者： Zengzi Wang , Runtao Hu , Gaihuan Ren , Gongrang Li , Shangying Liu
DOI: 10.1016/J.COLSURFA.2019.123820
关键词:
摘要: Abstract The application of conventional alkalis (NaOH or Na2CO3) in alkali/surfactant/polymer (ASP) flooding is rather limited due to their intrinsic drawbacks, including precipitating during injection into formation water with a high divalent ion concentration and enhancing the dispersibility clays (e.g., montmorillonite (MMT) kaolinite) water, which lead damage reservoir formations bring about difficulties treating produced fluids. Here, we propose polyetheramine D 230 as an alternative alkali avoid these problems. diamine linked by poly(oxypropylene) backbones. Interfacial tension emulsification measurements proved that can neutralize acidic components crude oil generate surface-active soaps, facilitate water. Contact angle indicated oil-contaminated quartz surface treated 230/SP blends was successfully altered from oil-wet water-wet. Sand pack demonstrated able mobilize 19.23% original place (OOIP) after thorough flooding. Rheograms alkali/polymer showed reduced impact on viscosity. Static bottle tests no precipitation occurred injected Ca2+ concentration. Colloidal stability clay dispersions suggested inhibit dispersibility. As ASP flooding, not only facilitates enhanced recovery (EOR) but also solves problems such precipitation, biotoxicity, fluid viscosity brought inorganic organic alkalis. These advantages make eco-friendly choice for
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