Reducing the relative water/petroleum movement in a petroleum producing reservoir

Claim 1

A method fo reducing the relative water/petroleum movement in a petroleum-containing water drive reservoir penetrated by one or more wells comprising: (a) injecting into the reservoir a slug of an oil containing both an oil-soluble thickening agent and a solid particulate water-soluble thickening agent, and (b) producing the well.

Claim 2

A method fo reducing the relative water/petroleum movement in a petroleum-containing water drive reservoir penetrated by one or more wells comprising: (a) injecting into the reservoir a slug of an oil containing both an oil-soluble thickening agent and a solid particulate water-soluble thickening agent, and (b) producing the well.

Claim 10

A method for reducing the water/oil ratio produced from a well completed in an oil-containing water drive reservoir penetrated by one or more wells comprising: (a) injecting into the reservoir a slug of an oil containing both an oil-soluble thickening agent selected from the group consisting of polymethyl laurylate, polyalkyl styrene, polybutadiene, polyisobutylene, a bivalent or trivalent metallic soap of a monocarboxylic acid having 14 or more carbon atoms, a powdered colloidal silica and a solid particulate water-soluble thickening agent selected from the group consisting of water-soluble polymers, cellulose derivatives, alkaline alkali metal silicates having a molar ratio of M 2 O/SiO 2 of 1 or above wherein M is an alkali metal atom, and natural gums, and (b) producing the well.

Claim 11

A method for reducing the water/oil ratio produced from a well completed in an oil-containing water drive reservoir penetrated by one or more wells comprising: (a) injecting into the reservoir a slug of an oil containing both an oil-soluble thickening agent selected from the group consisting of polymethyl laurylate, polyalkyl styrene, polybutadiene, polyisobutylene, a bivalent or trivalent metallic soap of a monocarboxylic acid having 14 or more carbon atoms, a powdered colloidal silica and a solid particulate water-soluble thickening agent selected from the group consisting of water-soluble polymers, cellulose derivatives, alkaline alkali metal silicates having a molar ratio of M 2 O/SiO 2 of 1 or above wherein M is an alkali metal atom, and natural gums, and (b) producing the well.

Claim 12

A method for prolonging the life of a scale inhibitor injected into an oil-containing water drive reservoir comprising: (a) injecting a slug of an aqueous composition containing a scale inhibitor selected from the group consisting of a water-insoluble polyvalent metal salt of a hydrolyzed polyacrylamide having a molecular weight of about 5,000 to 50,000; a sulfonated alkali lignin having a degree of sulfonation of about 0.8 to 4.0; a polyamino polycarboxylic compound; a polyphosphate glass; an organic phosphate; a phosphate mixed ester of hydroxy amines containing less than 8 carbon atoms in hydrocarbon groups attached to the amino nitrogen and hydroxy hydrocarbons containing at least 6 carbon atoms in a hydrocarbon group; and a phosphoric acid, (b) injecting a slug of an oil containing both an oil-soluble thickening agent selected from the group consisting of polymethyl laurylate, polyalkyl styrene, polybutadiene, polyisobutylene, a bivalent or trivalent metallic soap of a monocarboxylic acid and a solid particulate water-soluble thickening agent selected from the group consisting of water-soluble polymers, cellulose derivatives, alkaline alkali metal silicates having a molar ratio of M 2 O/SiO 2 of 1 or above wherein M is an alkali metal atom, and natural gums, and (c) producing the well.

Claim 13

A method for prolonging the life of a scale inhibitor injected into an oil-containing water drive reservoir comprising: (a) injecting a slug of an aqueous composition containing a scale inhibitor selected from the group consisting of a water-insoluble polyvalent metal salt of a hydrolyzed polyacrylamide having a molecular weight of about 5,000 to 50,000; a sulfonated alkali lignin having a degree of sulfonation of about 0.8 to 4.0; a polyamino polycarboxylic compound; a polyphosphate glass; an organic phosphate; a phosphate mixed ester of hydroxy amines containing less than 8 carbon atoms in hydrocarbon groups attached to the amino nitrogen and hydroxy hydrocarbons containing at least 6 carbon atoms in a hydrocarbon group; and a phosphoric acid, (b) injecting a slug of an oil containing both an oil-soluble thickening agent selected from the group consisting of polymethyl laurylate, polyalkyl styrene, polybutadiene, polyisobutylene, a bivalent or trivalent metallic soap of a monocarboxylic acid and a solid particulate water-soluble thickening agent selected from the group consisting of water-soluble polymers, cellulose derivatives, alkaline alkali metal silicates having a molar ratio of M 2 O/SiO 2 of 1 or above wherein M is an alkali metal atom, and natural gums, and (c) producing the well.