| 摘要 |
A well treatment fluid of use in formation fracturing includes one or more amphoteric surfactants, water and one or more non-aqueous solvents. If an acid forming compound is also included, a hydrophilic alcohol may be present. The composition is such that the fluid will form vesicles. The water may be freshwater or seawater; the amphoteric surfactants may include natural or synthetic lecithin and the non-aqueous solvent may be an alcohol, a mineral oil, a fatty acid, soybean oil, corn oil, a glycol, an ether or mixtures thereof. The acid forming compound, if present, may be methyl, ethyl, propyl or butyl formate and the hydrophilic alcohol may be methanol, ethanol, propanol or butanol.
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