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POLYMERIC GEL SYSTEM AND METHODS FOR MAKING AND USING SAME IN HYDROCARBON RECOVERY
POLYMERIC GEL SYSTEM AND METHODS FOR MAKING AND USING SAME IN HYDROCARBON RECOVERY
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机译:聚合物凝胶体系及其在油气回收中的使用和制造方法
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摘要
Coacervate gels having excellent shear viscosities and other properties are made with anionic or cationic polymers, a smaller amount of a surfactant having a charge opposite that of the polymer, and a hydrophobic alcohol and an effective amount of a phosphorus-containing compound sufficient to increase the viscosity of coacervate gels up to 3 times as compared to the gels in the absence of the phosphorus-containing compound. The Zeta Potential of the gel is maintained at an absolute value of at least 20. Optional gel promoting additives include betaines and amine oxides. A preferred gel comprises poly diallyl dimethyl ammonium chloride, a lesser amount of sodium lauryl sulfonate, and lauryl alcohol. The gels are particularly useful in well drilling fluids and well fracturing fluids.
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