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Compositions and Methods for Removal of Asphaltenes from a Portion of a Wellbore or Subterranean Formation Using Water-Organic Solvent Emulsion with Non-Polar and Polar Organic Solvents
Compositions and Methods for Removal of Asphaltenes from a Portion of a Wellbore or Subterranean Formation Using Water-Organic Solvent Emulsion with Non-Polar and Polar Organic Solvents
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机译：使用非极性和极性有机溶剂的水有机溶剂乳液从井筒或地下地层中除去沥青质的组合物和方法
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摘要
Compositions are provided for removing an organic material, especially asphaltenes, from a portion of a wellbore or a subterranean formation. The composition comprises: (A) water; (B) an organic solvent blend further comprising: (i) a non-polar organic solvent; and (ii) at least two polar organic solvents; and (C) a surfactant adapted for forming an emulsion of the organic solvent blend and the water. According to another aspect of the invention, the compositions comprise: (A) water, wherein the water is greater than 25% by volume of the composition; (B) an organic solvent blend further comprising: (i) a non-polar organic solvent; and (ii) a polar organic solvent; and (C) a surfactant adapted for forming an emulsion of the organic solvent blend and the water. Methods are provided for removing an organic material from a portion of a wellbore or a subterranean formation. The method comprises the steps of: (A) forming a composition according to the invention; and (B) introducing the composition to the portion from which the organic material is to be removed.
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