Foamed wettability alteration treatment for deep condensate and water blockage in gas reservoirs
AssigneeAramco Services Company
InventorsMohammed Ali Ibrahim Sayed, Rajesh Saini
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Abstract
A formation treatment fluid may include a wettability alteration agent, a solvent, an injection gas, and an optional foaming agent. The wettability alteration agent may include a fluorinated surfactant, a silicon-based surfactant, charged nanoparticles partially modified with fluorine containing groups, or combinations thereof. Methods for altering a hydrocarbon-bearing reservoir surface wettability may include providing the formation treatment fluid, injecting the formation treatment fluid into the hydrocarbon-bearing reservoir, and recovering fluids produced from the hydrocarbon-bearing reservoir.
Claims21
A foamed formation treatment fluid comprising:
- a wettability alteration agent configured to provide an omniphobic layer on a rock surface;
- an aqueous solvent comprising water and an alcohol,
- an injection gas comprising one or more gases selected from the group consisting of air, nitrogen (N2), carbon monoxide (CO), carbon dioxide (CO2), and mixtures thereof;
- and
- optionally a foaming agent,
- wherein the wettability alteration agent comprises a fluorinated surfactant,
- wherein the wettability alteration optionally further comprises one or more selected from the group consisting of a silicon-based surfactant, charged nanoparticles partially modified with fluorine containing groups, and combinations thereof,
- wherein the fluorinated surfactant comprises a nonionic polymeric fluorochemical surfactant, a fluoroalkylsulfonate, a fluoroalkyl phosphate, a fluoroaliphatic ester, a fluoroaliphatic amine oxide, a fluoropolyether disulfate, or combinations thereof,
- wherein the wettability alteration agent, the aqueous solvent, the injection gas, and the optional foaming agent are in the form of a foamed fluid;
- and
- wherein the foamed formation treatment fluid has a flash point of at least 50° C.
A method for altering a hydrocarbon-bearing reservoir surface wettability, the method comprising:
- providing a foamed formation treatment fluid comprising
- a wettability alteration agent configured to provide an omniphobic layer on a rock surface;
- an aqueous solvent comprising water and an alcohol,
- an injection gas comprising one or more gases selected from the group consisting of air, nitrogen (N2), carbon monoxide (CO), carbon dioxide (CO2), and mixtures thereof, and
- optionally a foaming agent,
- wherein the wettability alteration agent comprises a fluorinated surfactant,
- wherein the wettability alteration optionally further comprises one or more selected from the group consisting of a silicon-based surfactant, charged nanoparticles partially modified with fluorine containing groups, and combinations thereof,
- wherein the fluorinated surfactant comprises a nonionic polymeric fluorochemical surfactant, a fluoroalkylsulfonate, a fluoroalkyl phosphate, a fluoroaliphatic ester, a fluoroaliphatic amine oxide, a fluoropolyether disulfate, or combinations thereof, and
- wherein the foamed formation treatment fluid has a flash point of at least 50° C.;
- injecting the foamed formation treatment fluid into the hydrocarbon-bearing reservoir;
- and
- recovering fluids produced from the hydrocarbon-bearing reservoir.
Dependencies are inferred from the claim text.