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US 10,053,619 B2Granted
Siloxane surfactant additives for oil and gas applications
AssigneeFlotek Chemistry, LLC
InventorsHasnain Saboowala, Randal M. Hill
Life of this patent
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Abstract
A well treatment additive includes a siloxane surfactant, a solvent and an aqueous phase. The solvent, in some embodiments, is a terpene hydrocarbon. Also disclosed is a method for using the well treatment additive to form and enhance the properties of foams useful for the treatment of oil and gas wells. Methods of using the novel well treatment foams include using the additives in a variety of well treatment processes including, but not limited to, acidizing operations, hydraulic fracturing operations, well remediation operations and water removal operations.
Claims17
A well treatment additive comprising:
- a foam comprising:
- a gas selected from the group consisting of carbon dioxide, flu gas, methane, natural gas, and nitrogen;
- a microemulsion having a water based continuous phase and comprising a siloxane surfactant, a solvent, and an aqueous phase,
- wherein the solvent is a terpene hydrocarbon;
- wherein the siloxane surfactant is present in an amount between about 10 wt % and about 70 wt % versus the total weight of the microemulsion;
- and
- wherein the siloxane surfactant is an alkoxylated siloxane surfactant selected from the group consisting of:
- (CH3)3SiO(Si(CH3)2O)nSi(CH3)2CH2CH2CH2(OCH2CH2)x(OCH(CH3)CH2)yOR3,
- R3(OCH2CH2)x(OCH(CH3)CH2)yCH2CH2CH2(CH3)2SiO(Si(CH3)2O)nSi(CH3)2CH2CH2CH2(OCH2CH2)x(OCH(CH3)CH2)yOR3,
- and
- wherein each R3 is independently H, —CH3, or —C(O)CH3, each n is independently 1-4, each x is independently 4-12, z is 3 or 4, and each y is independently 0-2.
8 more elements
Dependencies are inferred from the claim text.