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Wettability Alteration of Porous Media to Gas-Wetting for Improving Productivity and Injectivity in Gas-Liquid Flows. First Annual Report for September 21, 2000-September 20, 2001.

DE2004834362

Publication Date	2001
Page Count	78
Abstract	The wettability of Berea and chalk samples for gas-oil and gas-water fluids were altered from strong liquid-wetting to intermediate gas-wetting. Two polymers, FC-722 and FC-759, were used to alter the wettability. FC-759 is soluble in water and some 20 times less expensive than FC-722. Gas and liquid relative permeabilities were measured before and after wettability alteration. The results demonstrate a significant increase in liquid-phase relative permeability. Gas-phase relative permeability for a fixed saturation may increase or decrease. However, because of the very high liquid mobility and reduced liquid saturation, the gas mobility also increases for a fixed pressure drop. A number of liquid injectivity tests were also carried out. The results reveal that the liquid-phase mobility can increase significantly when the wettability of rocks is altered from strong liquid-wetting to intermediate gas-wetting. All the results show clearly that the application of wettability alteration to intermediate gas-wetting may significantly increase deliverability in gas condensate reservoirs.
Keywords	Wettability Gas condensates Porous materials Gas flow Liquid flow Calcite Productivity Polymers Saturation Permeability Pressure drop Gas injection Water Reservoir engineering
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Reservoir Engineering Research Inst., Palo Alto, CA.
Document Type	Technical Report
NTIS Issue Number	200516

Wettability Alteration of Porous Media to Gas-Wetting for Improving Productivity and Injectivity in Gas-Liquid Flows. First Annual Report for September 21, 2000-September 20, 2001.

Wettability Alteration of Porous Media to Gas-Wetting for Improving Productivity and Injectivity in Gas-Liquid Flows. First Annual Report for September 21, 2000-September 20, 2001.
DE2004834362

Publication Date	2001
Page Count	78
Abstract	The wettability of Berea and chalk samples for gas-oil and gas-water fluids were altered from strong liquid-wetting to intermediate gas-wetting. Two polymers, FC-722 and FC-759, were used to alter the wettability. FC-759 is soluble in water and some 20 times less expensive than FC-722. Gas and liquid relative permeabilities were measured before and after wettability alteration. The results demonstrate a significant increase in liquid-phase relative permeability. Gas-phase relative permeability for a fixed saturation may increase or decrease. However, because of the very high liquid mobility and reduced liquid saturation, the gas mobility also increases for a fixed pressure drop. A number of liquid injectivity tests were also carried out. The results reveal that the liquid-phase mobility can increase significantly when the wettability of rocks is altered from strong liquid-wetting to intermediate gas-wetting. All the results show clearly that the application of wettability alteration to intermediate gas-wetting may significantly increase deliverability in gas condensate reservoirs.
Keywords	Wettability Gas condensates Porous materials Gas flow Liquid flow Calcite Productivity Polymers Saturation Permeability Pressure drop Gas injection Water Reservoir engineering
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Reservoir Engineering Research Inst., Palo Alto, CA.
Document Type	Technical Report
NTIS Issue Number	200516