Gel and process for preventing carbon dioxide break through

Patent · Tue Jun 16 04:00:00 EDT 1987

OSTI ID:6183592

Sandiford, B B; Zillmer, R C

A process is described for retarding the flow of carbon dioxide in carbon dioxide break-through fingers in a subterranean formation, the process comprising: (a) introducing a gas selected from the group consisting of carbon dioxide and gases containing carbon dioxide into a subterranean deposit containing carbon dioxide break-through fingers; (b) after the carbon dioxide break-through fingers have sorbed a predetermined amount of the gas, stopping the flow of the gas into the subterranean formation, (c) after stopping the flow of the gas into the subterranean formation, introducing an effective amount of a gel-forming composition into the subterranean formation and into the carbon dioxide break-through fingers, the gel-forming composition being operable, when contacting carbon dioxide break-through fingers containing the brine which has absorbed substantial amounts of carbon dioxide to form a gel in the fingers which is operable for retarding the flow of the gas in the finger. The gel-forming composition comprises: i. an aqueous solution comprising a first substance selected from the group consisting of polyvinyl alcohols, polyvinyl alcohol copolymers, and mixtures thereof, and ii. an amount of a second substance selected from the group consisting of aldehydes, aldehyde generating substances, acetals, acetal generating substances, and mixtures thereof.

• Assignee: Cities Service Oil and Gas Corp., Tulsa, OK
• Patent Number(s): US 4673038
• OSTI ID: 6183592
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ACETALS
ADDITIVES
ADSORPTION
ALCOHOLS
ALDEHYDES
AQUEOUS SOLUTIONS
BRINES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON DIOXIDE INJECTION
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COLLOIDS
COPOLYMERS
CROSS-LINKING
DISPERSIONS
ENERGY SOURCES
ENHANCED RECOVERY
ETHERS
FLUID FLOW
FLUID INJECTION
FOSSIL FUELS
FUELS
GAS FLOW
GELATION
GELS
HYDROXY COMPOUNDS
MISCIBLE-PHASE DISPLACEMENT
MIXTURES
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
POLYMERIZATION
POLYMERS
POLYVINYLS
PVA
QUANTITY RATIO
RECOVERY
SOLUTIONS
SORPTION
STIMULATION
WELL STIMULATION
WELLS