Methods and Systems for Treating Hydraulically Fractured Formations

A method for treating a hydrocarbon-bearing formation comprising:

• (a) pumping into a wellbore a non-emulsified treatment composition comprising liquefied petroleum gas (LPG), one or more surfactants, a non-emulsifier, and a defoamer;
• wherein the non-emulsified treatment composition contains no separately added water;
• (b) causing the 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
• (c) recovering a non-emulsified production composition that includes (i) hydrocarbons, (ii) a portion of the LPG that was previously pumped into the wellbore in step (a), (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 step (a).

A method for treating a hydrocarbon-bearing formation 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 well bore 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 the 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) 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.