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Compositions and process for recovering subterranean oil using green non-toxic biodegradable strong alkali metal salts of polymerized weak acids
Compositions and process for recovering subterranean oil using green non-toxic biodegradable strong alkali metal salts of polymerized weak acids
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机译:使用聚合的弱酸绿色无毒,可生物降解的强碱金属盐回收地下油的组合物和方法
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摘要
Compositions and process for recovering of oil from subterranean oil-bearing reservoirs consisting of green non-toxic biodegradable strong alkali metal salt of polymerized weak acids, one or more surfactants, an aqueous fluid, a optionally one or more mobility control agents and optionally one or more co-solvents are disclosed. Such compositions are injected into the reservoir through one or more injection wells and assist in recovering trapped oil through one or more producing wells.;A preferred green non-toxic biodegradable strong alkali metal salt of polymerized weak acids is the sodium salt of polyaspartic acid shown below where n is 10 to 50.; ;The compositions and the process of the present invention offer the advantage of improved compatibility with unsoftened waters, surfactants, and various mobility control agents. The green non-toxic, biodegradable properties of the alkali makes it particularly suitable for environmentally sensitive applications such as offshore and inland lakes.
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