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5478802 |
Gelling compositions useful for oil field applications
A gelling composition and a process for wellbore treatment comprising injecting the composition into reservoirs are disclosed wherein the composition comprise a produced brine; a water-soluble...
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5458195 |
Cementitious compositions and methods
The present invention provides improved cementitious compositions which can include drilling fluid as a component thereof and methods of cementing wells utilizing such compositions. The...
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5441928 |
Aqueous gellable composition containing an anti-syneresis agent
An aqueous gellable composition capable of producing gels resistant to syneresis in the presence of divalent ions, contains: a water-soluble acrylamide polymer or copolymer, a crosslinking...
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5436396 |
Stabilizing compositions and methods for stabilizing subterranean formations
A method for stabilizing a subterranean formation which includes introducing a stabilizing composition into a subterranean formation, for example, by pumping into and through cracks and crevices in...
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5431226 |
Process for reducing permeability in a high-temperature subterranean hydrocarbon-bearing formation utilizing a decarboxylated crosslinking agent
A process and composition are provided for permeability reduction in a hydrocarbon-bearing formation to improve hydrocarbon recovery therefrom. The process includes placement of a crosslinked...
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5421410 |
Plugging of underground strata to eliminate gas and water coning during oil production
A process for plugging an underground strata to prevent coning, i.e. the intrusion into an oil production stream of gas located above an oil producing formation and/or water located below the...
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5420174 |
Method of producing coated proppants compatible with oxidizing gel breakers
Methods and compositions are provided for producing a curable resin coated proppant and a crosslinked aqueous gel carrier fluid system. The resin coated proppant and crosslinked aqueous gel carrier...
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5418217 |
Composition for selectively reducing subterranean formation permeability
Visible gels are formed by mixing an inorganic crosslinking agent with a low viscosity aqueous solution having a low polyacrylamide concentration and devoid of polymers containing a vicinal diol...
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5415229 |
Hydrocarbon recovery process utilizing a gel prepared from a polymer and a preformed crosslinking agent
A process and composition are provided for permeability reduction in a hydrocarbon-bearing formation to improve hydrocarbon recovery therefrom. The process includes placement of a crosslinked...
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5399269 |
Gelation of water soluble polymers
A gelable composition and process are disclosed that delay the gelation and increase the gel strength of gelled water soluble acrylamide-containing polymers contains: (1) a water dispersible first...
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5393810 |
Method and composition for breaking crosslinked gels
Compositions and methods are provided which provide improved viscosity reduction of crosslinked hydratable polymer treating fluids in the presence of uncured resin-coated proppants. The uncured...
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5389706 |
Well cement compositions having improved properties and methods
Improved cement compositions and methods of using such compositions in carrying out construction and remedial operations in oil and gas wells at high temperatures are provided. The compositions are...
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5377760 |
Fiber reinforced gel for use in subterranean treatment processes
Fibers are added to a gelation solution and the mixture is pumped to a subterranean injection site where it gels in place. The gelation solution is preferably comprised of partially hydrolyzed...
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5368642 |
Functionalized polymers containing amine groupings and their use as retarders in cement slurries
A functionalized polyamine effective to retard the setting rate of a slurry of hydraulic cement is disclosed. A slurry of hydraulic cement in water which includes the functionalized polyamine,...
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5360787 |
Dispersant compositions comprising sulfonated isobutylene maleic anhydride copolymer for subterranean well drilling and completion
A dispersant for drilling fluids, spacer fluids, cement slurries, completion fluids and mixtures of drilling fluids and cement slurries used for drilling and cementing subterranean wells.
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5358051 |
Method of water control with hydroxy unsaturated carbonyls
A method of forming a gel in the subsurface formation is provided whereby a self crosslinking monomer selected from hydroxy unsaturated carbonyl compounds is polymerized in the formation by a...
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5354786 |
Fluid loss control composition
Polymers used to prevent fluid loss from boreholes may be eliminated after a predetermined time by including with the polymer composition halogen-substituted organic acids or their salt...
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5340397 |
Set retarded ultra fine cement compositions and methods
Set retarded ultra fine cement compositions which remain pumpable for a predictable period of time at temperatures up to about 240° F. are provided. The compositions are basically comprised of an...
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5339903 |
Method for control of gas migration in well cementing
A method of cementing a wellbore which penetrates a subsurface gas-containing formation is provided whereby gas migration is reduced. The method features the use of an additive consisting of a...
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5340860 |
Low fluid loss cement compositions, fluid loss reducing additives and methods
Improved liquid fluid loss reducing additives, well cement compositions containing the additives and methods of using the compositions are provided by this invention. The liquid fluid loss reducing...
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5338465 |
Aqueous gellable composition with delayed gelling time
An aqueous gellable composition having a delayed gelling time presettable within wide time and temperature ranges, contains a water-soluble organic polymer crosslinkable with chrome ion and a...
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5335726 |
Water control
A method of forming a gel in a subsurface formation is provided whereby a monomer is polymerized in the formation in the presence of a crosslinker by an initiator selected from azo compounds which...
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5321062 |
Substituted alkoxy benzene and use thereof as wetting aid for polyepoxide resins
A substituted alkoxy benzene having the formula ##STR1## wherein R, R 1 , R 2 and R 3 are each a hydrocarbon radical having from 1 to 8 carbon atoms and x is 0 or 1 is provided. The substituted...
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5314023 |
Method for selectively treating wells with a low viscosity epoxy resin-forming composition
Method for selectively treating wells using a low viscosity epoxy resin-forming composition containing a single curing agent. The composition comprises a liquid bisphenol A-based epoxy material and...
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5304620 |
Method of crosslinking cellulose and guar derivatives for treating subterranean formations
The present invention provides a method of treating of subterranean formation using a gel of a graft copolymer of a hydroxyalkyl cellulose, guar or hydroxypropyl guar prepared by a redox reaction...
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5293938 |
Well completion and remedial methods utilizing cement-ladened rubber
A method of forming in a desired location in a well bore a dual-state composite of a hardened hydraulic cement and a solid rubber which features the use of a composition consisting essentially of a...
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5291949 |
Method for inhibiting caustic flood breakthrough
Polymers (and especially hydroxyethylcellulose) are crosslinked using a lanthanide as a crosslinking agent. The crosslinked polymers have utility in well completion, well stimulation, enhanced oil...
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5277830 |
pH tolerant heteropolysaccharide gels for use in profile control
A pH tolerant aqueous gel-forming composition for placement within a subterranean formation. The composition includes water, a viscosifying amount of a heteropolysaccharide prepared by growing...
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5268112 |
Gel-forming composition
Gels containing gas precursors and/or pathways are used to selectively reduce the flow of aqueous fluids with respect to the flow of nonaqueous fluids to enhance the recovery of the nonaqueous...
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5264470 |
Set retarding additives, cement compositions and methods
The present invention provides set retarding additives, set retarded hydraulic cement compositions including such additives and methods of using the cement compositions for cementing zones in...
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5262452 |
Oil well cementing formulations
An oil and gas well cementing composition has styrene/butadiene latex and a combination of nonionic and anionic surfactants for improved physical properties, especially fluid loss.
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5260391 |
Tetrapolymerization product of 2-acrylamido-2-methyl propane sulfonic acid/associated salts, n-vinyl pyrrolidone, acrylamide, and acrylic acid/associated salts
A unique tetrapolymer and an additive package for reducing water loss from cement comprising a tetrapolymer, base, and electrolyte, at least one surfactant, and water is disclosed. A process for...
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5256315 |
Gellable aqueous compositions containing polymers with special chelating functional groups useful for recovering oil from an oil field
Gellable compositions containing: (a) water; (b) a water-soluble organic polymer bearing special chelating functional groups; (c) a multi-valent metal ion capable of causing the polymer to...
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5244936 |
Enhanced oil recovery profile control with crosslinked anionic acrylamide copolymer gels
An aqueous polymeric gel-forming composition capable of selectively plugging highly permeable zones in subterranean oil-bearing formations. The composition comprises an aqueous solution of an...
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5244042 |
Lanthanide-crosslinked polymers for subterranean injection
Polymers (and especially hydroxyethylcellulose) are crosslinked using a lanthanide as a crosslinking agent. The crosslinked polymers have utility in well completion, well stimulation, enhanced oil...
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5226480 |
Recovery system containing lanthanide-crosslinked polymers
Polymers (and especially hydroxyethylcellulose) are crosslinked using a lanthanide as a crosslinking agent. The crosslinked polymers have utility in well completion, well stimulation, enhanced oil...
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5225090 |
Visible gels prepared using stainless steel as a crosslinking agent
Visible gels are formed by mixing an inorganic crosslinking agent with a low viscosity aqueous solution having a low polyacrylamide content. The visible gels are employed to reduce the...
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5219475 |
Aqueous gellable composition, useful for modifying the permeability of a petroleum reservoir
An aqueous gellable composition having a delayed gelling time is disclosed, which contains a water-soluble polymer crosslinkable with Cr 3 + and a crosslinking/retardant system containing a Cr 3 +...
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5219476 |
Gellable aqueous composition and its use in enhanced petroleum recovery
The permeability of high-permeability zones in a oil reservoir can be reduced by using a gellable aqueous composition with delayed gelation. The composition comprises: a) water; b) a...
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5211858 |
Lanthanide-crosslinked polymers for subterranean fluid containment
Polymers (and especially hydroxyethylcellulose) are crosslinked using a lanthanide as a crosslinking agent. The crosslinked polymers have utility in well completion, well stimulation, enhanced oil...
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5199823 |
Aqueous resin preparations and a process for stabilizing rock and plugging cavities
The invention relates to aqueous preparations of acid-catalyzed melamine resins and/or urea-formaldehyde condensates which contain an addition of zeolite NaA and/or hydroxysodalite to increase...
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5179136 |
Gelatin of acrylamide-containing polymers with aminobenzoic acid compounds and water dispersible aldehydes
A novel composition and process are disclosed for forming crosslinked gels at elevated temperatures utilize a novel crosslinking agent comprising at least one aminobenzoic acid compound and a water...
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5161615 |
Method for reducing water production from wells
Water production from a wellbore is reduced by sequentially or simultaneously injecting (a) a hydrophilic polymer-containing organic carrier fluid and (b) a crosslinking agent-containing fluid into...
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5159980 |
Well completion and remedial methods utilizing rubber latex compositions
Well completion methods utilizing rubber latex compositions are provided. The compositions are comprised of an aqueous suspension of rubber, a vulcanizing agent and a vulcanization activator, and...
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5156214 |
Method for imparting selectivity to polymeric gel systems
A method for imparting selectivity to an in-situ gel-forming composition for placement within a subterranean oil-bearing formation having relatively high permeability zones and relatively low...
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5145602 |
Sol/gels containing nonionic surfactants and preparation methods
An electrically conductive polymer composition containing a nonconjugated polymer and a salt is prepared by admixing a sol or gel composition containing the salt with a polymer. A novel sol or gel...
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5134176 |
Crosslinked polyvinyl amine copolymer gels for use under harsh reservoir conditions
A gel-forming composition capable of plugging highly permeable zones in a subterranean formation. The composition comprises water, a viscosifying amount of a water-dispersible polyvinyl amine...
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5131469 |
Gellable aqueous compositions and its use in enhanced petroleum recovery
A gellable aqueous compositions able to reduce the permeability of high-permeability zones in an oil reservoir is a aqueous solution containing metered quantities of: a) a water-soluble organic...
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5132029 |
Method and composition for reducing the permeability of a high-permeability zone in an oil reservoir
A method for reducing the permeability of a high-permeability zone in a high-temperature oil reservoir comprises: preparing a gellable polymeric aqueous solution, operating on the surface under...
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5128390 |
Methods of forming consolidatable resin coated particulate materials in aqueous gels
Improved methods of forming and suspending consolidatable resin composition coated particulate materials in gelled aqueous carrier liquids are provided. In accordance with the methods, a gelled...
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