Siloxane surfactant additives for oil and gas applications
AssigneeFlotek Chemistry, LLC
InventorsGlenn S. Penny, Keith Ingram Dismuke, Richard Nelson Fox, Andrei Zelenev, Randal M. Hill
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Abstract
A well treatment additive includes a siloxane surfactant, a solvent and an aqueous phase. The solvent is preferably a terpene hydrocarbon. Also disclosed is a method for using the well treatment additive to form and enhance the properties of terpene solvent based additives useful for the treatment of oil and gas wells. Methods of using the novel well treatment additives 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.
Claims11
A well treatment additive comprising:
- a siloxane surfactant in an amount between about 10 wt % and about 15 wt % versus the total well treatment additive, wherein the siloxane surfactant has a formula selected from the group consisting of:
- MDa(D′R1)bM (formula 1) and (M′R1)Da(M′R1) (formula 2)
- wherein “R1” represents an organic radical comprising —(CH2)n—(OCH2CH2)x—(OCH(CH3)CH2)y—OR3, in which “n” is between 3 and about 11, “x” is between 3 and about 30, “y” is between 0and about 30, and “R3” is —H;
- wherein “M” represents Me3SiO1/2, D represents —Me2SiO—, “M′R1” represents Me2(R1)SiO1/2—, “D′R1” represents —Me(R1)SiO—, and “Me” represents —CH3;
- wherein for formula 1, “a” is 0-200 and “b” is 1-20;
- wherein for formula 2, “a” is 4-50;
- wherein the siloxane surfactant is a trisiloxane ethoxylate graft-type copolymer
- a hydrocarbon surfactant in an amount between about 10 wt % and about 35 wt % versus the total well treatment additive, wherein the hydrocarbon surfactant is selected from the group consisting of polyoxyethylene alky ethers, dialkyl sulfosuccinates, alkyl sulfates, sulfonates, carboxylates, amine oxides, primary alkylamines, dialkyl secondary amines, ethoxylated fatty amines, and combinations thereof;
- a solvent, wherein the solvent is a terpene hydrocarbon in an amount between about 5 wt % and about 40 wt % versus the total well treatment additive;
- and
- an aqueous phase, wherein nano-sized particles of the solvent are distributed within the aqueous phase.
Dependencies are inferred from the claim text.