METHODS TO ENHANCE GAS PRODUCTION FOLLOWING A RELATIVE-PERMEABILITY-MODIFIER TREATMENT
First Claim
1. A method of treating a subterranean formation such that initiation of gas production is enhanced following the treatment, comprising:
- introducing a relative-permeability modifier into the subterranean formation such that the relative-permeability modifier reduces permeability of the subterranean formation to aqueous fluids, wherein the relative-permeability modifier comprises a water-soluble polymer; and
introducing a water-drainage-rate-enhancing agent into the subterranean formation, wherein the water-drainage-rate-enhancing agent comprises at least one compound selected from the group consisting of;
a zwitterionic surfactant comprising an organic surfactant comprising an alkyl chain length of from about 12 to about 22 carbons, a cationic group, and an anionic group;
a cationic polyorganosiloxane comprising at least two quaternary ammonium groups;
a nonionic surfactant selected from the group consisting of;
an organic surfactant having the structure shown below;
R6-O[(EO)p-(PrO)q-(BuO)r]Hwherein R6 is an alcohol, phenol or phenol derivative or a fatty acid comprising about 12 to about 22 carbons, EO is an ethylene oxide radical. p is 1 to 20, PrO is a propylene oxide radical, q is 0 to 15, BuO is a butylene oxide radical, and r is 0 to 15;
an organic polyethylene carbonate having the structure shown below;
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Abstract
Provided embodiments relate to introducing a water-drainage-rate-enhancing agent into a subterranean formation to enhance gas production following a relative-permeability-modifier treatment to decrease undesired water production. An exemplary embodiment provides a method of treating a subterranean formation such that initiation of gas production is enhanced following the treatment, the method comprising: introducing a relative-permeability modifier into at least a portion of the subterranean formation such that the relative-permeability modifier reduces permeability of the portion to aqueous fluids; and introducing a water-drainage-rate-enhancing agent into at least a portion of the subterranean formation. Another exemplary embodiment provides a treatment fluid comprising a carrier fluid, a relative-permeability modifier, and a water-drainage-rate-enhancing agent.
121 Citations
26 Claims
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1. A method of treating a subterranean formation such that initiation of gas production is enhanced following the treatment, comprising:
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introducing a relative-permeability modifier into the subterranean formation such that the relative-permeability modifier reduces permeability of the subterranean formation to aqueous fluids, wherein the relative-permeability modifier comprises a water-soluble polymer; and introducing a water-drainage-rate-enhancing agent into the subterranean formation, wherein the water-drainage-rate-enhancing agent comprises at least one compound selected from the group consisting of; a zwitterionic surfactant comprising an organic surfactant comprising an alkyl chain length of from about 12 to about 22 carbons, a cationic group, and an anionic group; a cationic polyorganosiloxane comprising at least two quaternary ammonium groups; a nonionic surfactant selected from the group consisting of; an organic surfactant having the structure shown below;
R6-O[(EO)p-(PrO)q-(BuO)r]Hwherein R6 is an alcohol, phenol or phenol derivative or a fatty acid comprising about 12 to about 22 carbons, EO is an ethylene oxide radical. p is 1 to 20, PrO is a propylene oxide radical, q is 0 to 15, BuO is a butylene oxide radical, and r is 0 to 15; an organic polyethylene carbonate having the structure shown below; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of treating a subterranean formation with a relative-permeability modifier such that gas production is enhanced following the treatment, comprising:
introducing a treatment fluid into at least a portion of the subterranean formation, wherein the treatment fluid comprises; an aqueous fluid; the relative-permeability modifier in an amount in the range of from about 0.05% to about 1% by weight of the treatment fluid, wherein the relative-permeability modifier comprises a water-soluble polymer; and a water-drainage-rate-enhancing agent in an amount in the range of from about 0.5% to about 5% by weight of the treatment fluid. - View Dependent Claims (20, 21, 22, 23, 24)
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25. A method of treating a subterranean formation comprising combining a water-drainage-rate-enhancing agent with a relative-permeability-modifier treatment to decrease water production from the subterranean formation, such that initiation of gas production from the subterranean formation following the relative-permeability-modifier treatment is enhanced, wherein the water-drainage-rate-enhancing agent comprises at least one compound selected from the group consisting of:
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a zwitterionic surfactant comprising an organic surfactant comprising an alkyl chain length of from about 12 to about 22 carbons, a cationic group. and an anionic group; a cationic polyorganosiloxane comprising at least two quaternary ammonium groups; a nonionic surfactant selected from the group consisting of; an organic surfactant having the structure shown below;
R6-O[EO)p-(PrO)q-(BuO)r]Hwherein R6 is an alcohol, phenol or phenol derivative or a fatty acid comprising about 12 to about 22 carbons, EO is an ethylene oxide radical, p is 1 to 20, PrO is a propylene oxide radical, q is 0 to 15, BuO is a butylene oxide radical, and r is 0 to 15; an organic polyethylene carbonate having the structure shown below;
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26. A treatment fluid comprising a carrier fluid, a relative-permeability modifier, and a water-drainage-rate-enhancing agent, wherein the relative-permeability modifier comprises a water-soluble polymer, wherein the water-drainage-rate-enhancing agent comprises at least one compound selected from the group consisting of:
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a zwitterionic surfactant comprising an organic surfactant comprising an alkyl chain length of from about 12 to about 22 carbons, a cationic group, and an anionic group; a cationic polyorganosiloxane comprising at least two quaternary ammonium groups; a nonionic surfactant selected from the group consisting of; an organic surfactant having the structure shown below;
R6-O[(EO)p-(PrO)q-(BuO)r]Hwherein R6 is an alcohol, phenol or phenol derivative or a fatty acid comprising about 12 to about 22 carbons, EO is an ethylene oxide radical, p is 1 to 20, PrO is a propylene oxide radical, q is 0 to 15, BuO is a butylene oxide radical, and r is 0 to 15; an organic polyethylene carbonate having the structure shown below;
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Specification