Patent ID: 11898431
Assignee: UNIVERSAL CHEMICAL SOLUTIONS, INC.
Field: Basic materials chemistry (Chemistry)
Classification: CPC E  C | IPC C  E

Claim 11:
12. A method for treating a hydrocarbon-bearing formation previously subjected to hydraulic fracturing comprising:
(a) pumping into a wellbore a first volume of a non-emulsified treatment composition comprising liquefied petroleum gas (LPG), one or more surfactants, a non-emulsifier, and a defoamer; wherein the first volume of non-emulsified treatment composition contains no separately added water;
(b) pumping into the wellbore a second volume of a non-emulsified treatment composition comprising LPG, one or more surfactants, a non-emulsifier, a defoamer, and a diverter; wherein the second volume of non-emulsified treatment composition contains no separately added water;
(c) pumping into the wellbore a third volume of a non-emulsified treatment composition comprising LPG, one or more surfactants, a non-emulsifier, and a defoamer; wherein the third volume of non-emulsified treatment composition contains no separately added water;
(d) causing at least a portion of the first volume of non-emulsified treatment composition, at least a portion of the second volume of non-emulsified treatment composition, and at least a portion of the third volume of non-emulsified treatment composition to make contact with water residing in the formation such that no emulsion is formed with the water residing in the formation; and
(e) recovering a non-emulsified production composition that includes (i) residual hydrocarbons, (ii) a portion of the LPG that was previously pumped into the wellbore in steps (a), (b) and (c), respectively, (iii) a portion of the water that resided in the formation, and (iv) a portion of the one or more surfactants that were pumped into the wellbore in steps (a), (b) and (c), respectively.