Methods and compositions for use in oil and/or gas wells
First Claim
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1. A method of treating an oil and/or gas well having a wellbore, comprising:
- injecting a solution comprising an emulsion or a microemulsion into the wellbore, wherein the emulsion or the microemulsion comprises;
a surfactant, wherein the surfactant comprises a nonionic, an anionic or a cationic surfactant, wherein the cationic surfactant comprises a quaternary ammonium salt; and
a first solvent; and
a silicone solvent;
wherein the emulsion or the microemulsion comprises a surfactant, a first solvent, and a silicone solvent, wherein the silicone solvent is a volatile linear or cyclic siloxane having the chemical formula (CH3)3SiO—
((CH3)2SiO)n—
Si(CH3)3 or cyclic [(CH3)2SiO]m—
, wherein n is 0 to 5 and m is 4 or 5, wherein each R is the same or different and is an organic group, wherein the silicone solvent has a molecular weight of less than about 800 g/mol, wherein the surfactant comprises a nonionic, an anionic, or a cationic surfactant, wherein the cationic surfactant comprises a quaternary ammonium salt.
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Abstract
Methods and compositions comprising an emulsion or a microemulsion for use in various aspects of the life cycle of an oil and/or gas well are provided. In some embodiments, the emulsion or the microemulsion comprises water, a solvent, and a surfactant, and optionally, one or more additives.
339 Citations
22 Claims
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1. A method of treating an oil and/or gas well having a wellbore, comprising:
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injecting a solution comprising an emulsion or a microemulsion into the wellbore, wherein the emulsion or the microemulsion comprises; a surfactant, wherein the surfactant comprises a nonionic, an anionic or a cationic surfactant, wherein the cationic surfactant comprises a quaternary ammonium salt; and a first solvent; and a silicone solvent; wherein the emulsion or the microemulsion comprises a surfactant, a first solvent, and a silicone solvent, wherein the silicone solvent is a volatile linear or cyclic siloxane having the chemical formula (CH3)3SiO—
((CH3)2SiO)n—
Si(CH3)3 or cyclic [(CH3)2SiO]m—
, wherein n is 0 to 5 and m is 4 or 5, wherein each R is the same or different and is an organic group, wherein the silicone solvent has a molecular weight of less than about 800 g/mol, wherein the surfactant comprises a nonionic, an anionic, or a cationic surfactant, wherein the cationic surfactant comprises a quaternary ammonium salt. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification