Patent application number | Description | Published |
20090120642 | METHODS TO ENHANCE GAS PRODUCTION FOLLOWING A RELATIVE-PERMEABILITY-MODIFIER TREATMENT - Provided embodiments relate to introducing a water-drainage-rate-enhancing agent into a subterranean formation to enhance gas production following a relative-permeability-modifier treatment to decrease undesired water production. An exemplary embodiment provides a method of treating a subterranean formation such that initiation of gas production is enhanced following the treatment, the method comprising: introducing a relative-permeability modifier into at least a portion of the subterranean formation such that the relative-permeability modifier reduces permeability of the portion to aqueous fluids; and introducing a water-drainage-rate-enhancing agent into at least a portion of the subterranean formation. Another exemplary embodiment provides a treatment fluid comprising a carrier fluid, a relative-permeability modifier, and a water-drainage-rate-enhancing agent. | 05-14-2009 |
20090253594 | Methods for placement of sealant in subterranean intervals - Of the many methods provided herein, one method includes a method of treating an interval of a subterranean formation having a permeability that varies comprising: identifying the interval to be treated; introducing a relative-permeability modifier into the interval, wherein the relative-permeability modifier modifies the interval to have a more uniform effective permeability to water, wherein the relative permeability modifier comprises a water-soluble polymer; and introducing a sealant into the interval, wherein the more uniform effective permeability of the interval allows for a more uniform treatment of the interval by the than would be allowed without treatment of the interval with the relative-permeability modifier. | 10-08-2009 |
20090294126 | Methods of limiting or preventing fluid flow through a portion of a subterranean formation - A method of limiting or preventing fluid flow through a portion of a subterranean formation is provided. The method comprises the steps of: (a) forming a treatment fluid comprising: (i) a water-swellable, water-insoluble elastomer in the form of discrete particles, wherein the particles of the water-swellable, water-insoluble elastomer have a characteristic of being capable of sticking together to form an agglomeration when exposed to water; and (ii) a carrier fluid for the water-swellable, water-insoluble elastomer; and (b) injecting the treatment fluid through a well into the subterranean formation to deposit the discrete particles of the water-swellable, water-insoluble elastomer in the subterranean formation. | 12-03-2009 |
20100116498 | Methods for Placement of Sealant in Subterranean Intervals - Of the many methods provided herein, one method includes a method of treating an interval of a subterranean formation having a permeability that varies comprising: identifying the interval to be treated; introducing a relative-permeability modifier into the interval, wherein the relative-permeability modifier modifies the interval to have a more uniform effective permeability to water, wherein the relative permeability modifier comprises a water-soluble polymer; and introducing a sealant into the interval, wherein the more uniform effective permeability of the interval allows for a more uniform treatment of the interval by the than would be allowed without treatment of the interval with the relative-permeability modifier. | 05-13-2010 |
20110034351 | Hydrophobically and Cationically Modified Relative Permeability Modifiers and Associated Methods - Methods and compositions including a method comprising introducing a hydrophobically and cationically modified relative permeability modifier into a portion of a subterranean formation, wherein the hydrophobically and cationically modified relative permeability modifier comprises a hydrophilic polymer backbone with a hydrophobic modification and a cationic modification. | 02-10-2011 |
20110077323 | Compositions for Plugging and Sealing a Subterranean Formation - Compositions for treating a subterranean formation comprising a water-swellable agent and a sealing agent are described. Preferably, the water-swellable agent is a dehydrated polymer that forms a three-dimensional gel structure in water wherein the gel structure is a continuous mass both inside and outside the water-swellable agent. The sealing agent comprises a non-acidic ethylenically unsaturated polar monomer; a copolymerisable ethylenically unsaturated ester; and at least one organic gelling agent. | 03-31-2011 |
20110294704 | Permeability-Modifying Drilling Fluids and Methods of Use - Methods of reducing the permeability of a subterranean formation to aqueous-based fluids using a water-soluble relative permeability modifier that comprises a hydrophobically modified polymer, wherein the hydrophobically modified polymer is a reaction product of: a hydrophilic polymer that comprises a polymer selected from the group consisting of a polyvinylamine, a poly(vinylamine/vinyl alcohol), and an alkyl acrylate polymer; and, a hydrophobic compound comprising at least one alkyl chain having a carbon chain length between about 4 and about 22 carbons. The water-soluble relative permeability modifier may be placed within a subterranean drilling operation such that the water-soluble relative permeability modifier attaches onto surfaces within the subterranean formation to effect permeability of aqueous fluids. | 12-01-2011 |
20120168166 | Methods Useful for Diverting Aqueous Fluids in Subterranean Operations - Method of diverting fluids in a subterranean formation including the steps of providing a first fluid comprising an aqueous fluid and a hydrophobically modified water-soluble relative permeability modifier; introducing the first fluid into a well bore such that the first treatment fluid penetrates into a portion of the subterranean formation in a sufficient amount so as to substantially divert a second treatment fluid to another portion of the subterranean formation. Then, a second aqueous fluid is introduced into the well bore and substantially diverted from the portion of the subterranean formation penetrated with the first treatment fluid. In some cases, a well treatment operation, such as acid stimulation operation, a clay stabilization operation, or a scale inhibition operation, is performed using the second fluid. | 07-05-2012 |
20120231978 | Permeability-Modifying Drilling Fluids and Methods of Use - Drilling fluids comprising a base fluid and a hydrophobically modified polymer. The hydrophobically modified polymer consisting of alkyl chains having a carbon chain length between about 4 and about 22 carbons bound to a hydrophilic polymer. The hydrophilic polymer (1) consists of a polymer backbone that contains polar heteroatoms, at least one of which is not a nitrogen atom, and at least a portion of the polar heteroatoms are functionalized with the alkyl chains; and, (2) comprises at least one hydrophilic polymer selected from the group consisting of a cellulose, a chitosan, a polyetheramine, a polyhydroxyetheramine, a polylysine, and a polysulfone. | 09-13-2012 |
20120264885 | Hydrophobically and Cationically Modified Relative Permeability Modifiers and Associated Methods - Methods comprising providing a relative permeability modifier that comprises a hydrophilic polymer backbone with a hydrophobic modification and incorporating at least one cationic compound onto the hydrophilic polymer backbone. The hydrophilic polymer is one or more of: a polyacrylamide; a polyvinylamine; a poly(vinylamine/vinyl alcohol); an alkyl acrylate polymer; cellulose; chitosan; a polyamide; a polyetheramine; a polyhydroxyetheramine; a polylysine; a polysulfone; a gum; or a starch. The hydrophobic modification is achieved either by reacting the hydrophilic polymer with a hydrophobic compound or by a polymerization reaction product of a hydrophilic monomer and a hydrophobically modified hydrophilic monomer. The hydrophobic compound has an alkyl chain length from 4 to 22 carbons and is one or more of: an alkyl acrylate; an alkyl methacrylate; an alkyl acrylamide; an alkyl methacrylamide; or an alkyl dimethylammoniumethyl methacrylate halide. | 10-18-2012 |
20120298360 | Methods for Placement of Sealant in Subterranean Intervals - Methods comprising identifying an interval of a subterranean formation to be treated, the interval comprising multiple portions, each portion having a different effective permeability; introducing a relative-permeability modifier into the interval; and, introducing a sealant into the interval. The relative-permeability modifier modifies the interval to have a more uniform effective permeability to water-based fluids. The relative-permeability modifier comprises a water-soluble polymer. The more uniform effective permeability of the interval allows for a more uniform treatment of the interval by the sealant than would be allowed without treatment of the interval with the relative-permeability modifier. | 11-29-2012 |