Composition and Method for Fluid Recovery from Well
First Claim
1. A well treatment microemulsion for use in a subterranean formation comprising:
- a solvent blend comprising a solvent and a co-solvent;
a surfactant blend comprising a surfactant, wherein the surfactant blend is able to give formation intermediate wettability properties;
an alcohol; and
a carrier fluid;
wherein the alcohol, the solvent and surfactant blends are combined with the carrier fluid to produce the well treatment microemulsion.
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Accused Products
Abstract
A well treatment microemulsion for use in a subterranean formation is disclosed, the microemulsion comprises a solvent blend comprising a solvent and a co-solvent; a surfactant blend comprising a surfactant, wherein the surfactant blend is able to give formation intermediate wettability properties; an alcohol; and a carrier fluid; wherein the alcohol, the solvent and surfactant blends are combined with the carrier fluid to produce the well treatment microemulsion. By intermediate wettability it is meant that the water has an advancing contact angle on the surface between 62 and 133 degrees. The associate method of treating a subterranean formation of a well with the microemulsion and the associate method of modifying the wettability of the formation with the microemulsion are also disclosed.
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Citations
26 Claims
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1. A well treatment microemulsion for use in a subterranean formation comprising:
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a solvent blend comprising a solvent and a co-solvent; a surfactant blend comprising a surfactant, wherein the surfactant blend is able to give formation intermediate wettability properties; an alcohol; and a carrier fluid;
wherein the alcohol, the solvent and surfactant blends are combined with the carrier fluid to produce the well treatment microemulsion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of treating a subterranean formation in a well comprising:
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providing a solvent blend comprising a solvent and a co-solvent, a surfactant blend, an alcohol, and a carrier fluid; combining the alcohol, the solvent and surfactant blends with the carrier fluid to produce a well treatment microemulsion; introducing the microemulsion in to the well; and allowing the microemulsion to contact the formation to give intermediate wettability properties. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of modifying the wettability property of a subterranean formation in a well comprising:
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providing a solvent blend comprising a solvent and a co-solvent, a surfactant blend, an alcohol, and a carrier fluid; combining the alcohol, the solvent and surfactant blends with the carrier fluid to produce a well treatment microemulsion; introducing the microemulsion in to the well; allowing the microemulsion to contact the formation; and leaving the formation with intermediate wettability properties. - View Dependent Claims (22, 23, 24, 25, 26)
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Specification