Organic crosslinking of polymers for CO/sub 2/ flooding profile control

Patent · Tue Dec 27 00:00:00 EST 1988

OSTI ID:6441305

Mitchell, T O

A method is described for recovering hydrocarbonaceous fluids from a formation having a substantially low pH, penetrated by at least one injection well and fluidly communicating with at least one production well which formation contains a low permeability and a high permeability zone comprising: (a) mixing together above ground, water, a biopolymer selected from the group consisting of Xanthan polysacharides, Alcalignee polysaccharides, and mixtures thereof in an amount of about 0.2 to about 5.0 weight percent; (b) maintaining the mixture at a Ph of less than about 5.5; (c) adding only sufficient aminoplast resin as a crosslinker to form a rehealable gel which forms in about 0.5 to about 6.0 hours at ambient temperature and which is of a size sufficient to selectively close pores in the high permeability zone; (d) injecting via the injection well into the high permeability zone the gel in an amount sufficient to selectively close pores in the high permeability zone; (e) injecting via the injection well into the low permeability zone a drive fluid in an amount sufficient to remove hydrocarbonaceous fluids from low permeability zone which fluid is diverted from high permeability zone containing the closed pores and (f) recovering hydrocarbonaceous fluids and the drive fluid from the low permeability zone via the production well.

• Assignee: Mobil Oil Corp., New York, NY
• Patent Number(s): US 4793416
• OSTI ID: 6441305
• Resource Relation: Patent File Date: Filed date 30 Jun 1987
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
CARBON DIOXIDE
CROSS-LINKING
OIL WELLS
CARBON DIOXIDE INJECTION
POLYMERS
DISPLACEMENT FLUIDS
ENHANCED RECOVERY
GELATION
GELS
INTERSTITIAL WATER
LIQUID FLOW
MIXING
PERMEABILITY
PETROLEUM
PH VALUE
RESERVOIR FLUIDS
RESINS
WELL STIMULATION
XANTHUM GUM
CARBOHYDRATES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COLLOIDS
DISPERSIONS
ENERGY SOURCES
FLUID FLOW
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
GROUND WATER
HYDROGEN COMPOUNDS
MISCIBLE-PHASE DISPLACEMENT
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERIZATION
POLYSACCHARIDES
RECOVERY
SACCHARIDES
STIMULATION
WATER
WELLS
020300* - Petroleum- Drilling & Production