Nalco Company

Ecolab USA Inc.

Championx USA Inc.

Ondeo Nalco Energy Services, L.p.

Nalco Energy Services L.p

Kin-Tai Chang

Pious V Kurian

Duane S Treybig

Joseph Paul Street

James Charles Morgan

Harry Frampton

Manian Ramesh

Mingli Wei

Peter E Reed

Mei Liu

Narongsak Tonmukayakul

Yuntao Thomas Hu

Daniel Robert Dreyer

Olga E Shmakova-Lindeman

Vyacheslav Boyraskikh

Michael L Szalai

Eldon Dwyann Dalrymple

John Dempsey Morris

Dennis A Williams

Jeffery Atkins

John David Morris

William H Joyce

Dennis K Williams

Brett Showalter

Kirk E Wells

Cathy C Doucette

Jesse Vincent Mello

Analette I Lopez

Eldon Dwyann Dairymple

Kurt S Gerken

Cecil C Blair

Jeffery M Atkins

Brett M Showalter

Jesse V Mello

Described are methods and compositions for treating a subterranean formation. The method comprising introducing into the subterranean formation via a well-bore a diverter composition, the diverter composition comprising a combination of at least one deformable particle and at least one non-deformable particle; and allowing the diverter composition to block the flow of at least a portion of a treatment fluid from a first location within the well-bore to a second location.

Fluid diversion composition in well stimulation

The present invention generally relates to methods and friction-reducers for decreasing the friction of a fluid. More specifically, the method comprises contacting a friction-reducer to reduce the friction of a fluid flowing in a conduit. The friction-reducer comprises an emulsion polymer, comprising polyanion, polycation, and polynonionic monomers, and a highly concentrated salt solution.

Friction-reducing compositions formulated with highly concentrated brine

A composition including crosslinked expandable polymeric microparticles capable of hydrolysis at or below neutral pH and a method of modifying the permeability to water of a subterranean formation by introducing such compositions into the subterranean formation. This disclosure further relates to compositions and methods for the recovery of hydrocarbon fluids from a subterranean reservoir or formation subjected to COor COWater Alternating Gas flooding at low pH and increases the mobilization and/or recovery rate of hydrocarbon fluids present in the subterranean formations.

Composition and method for recovering hydrocarbon fluids from a subterranean reservoir

Method are provided for treating a wellbore or subterranean hydrocarbon-bearing formation to increase hydrocarbon recovery from the formation by in-depth mobility control and/or fluid diversion conformance by introducing a water soluble acrylamide polymer and a non-metallic organic crosslinking agent, or a crosslinkable acrylamide polymer, into an injection fluid entering the wellbore or the formation.

Weak gel system for chemical enhanced oil recovery

Methods for acid diversion in a hydrocarbon-containing subterranean formation are disclosed. The methods include injecting an acid diversion agent comprising a water-soluble or dispersible branched polyhydroxyetheramine and injecting an acidic solution into a well which is in contact with the hydrocarbon-containing subterranean formation. Preferably, the acid solution is diverted toward a zone of the formation that has a lower permeability to fluid than an adjacent zone. This process improves the permeability of the hydrocarbon-containing subterranean formation to hydrocarbons, while decreasing the permeability of the formation to water or brine.

Permeability of subterranean reservoirs using acid diversion

The present disclosure is directed to compositions and methods that may be used for enhanced oil recovery, for modifying the permeability of subterranean formations and for increasing the mobilization and/or recovery rate of hydrocarbon fluids present in the formations. The compositions may include, for example, expandable cross linked polymeric microparticles having an unexpanded volume average particle size diameter of from about 0.05 to about 5,000 microns and a cross linking agent content of from about 100 to about 200,000 ppm of hydrolytically labile silyl ester or silyl ether crosslinkers and from 0 to about 300 ppm of non-labile crosslinkers.

Compositions and methods for diverting injected fluids to achieve improved hydrocarbon fluid recovery

A water-in-oil emulsion composition and method of production is disclosed. The composition may comprise a monomer phase, an organic phase, at least one initiator, and an inverting phase. The monomer phase may further comprise at least one monomer, water, ammonium chloride, sodium 2-acrylamido-2-methyl-1-propanesulfonate, tetrasodium ethylenediaminetetraacetate, and at least one water soluble ethylenically unsaturated monomer. The organic phase may further comprise at least one hydrophobic solvent, lecithin, and a polyoxyethylene derivative of a sorbitan ester. The at least one monomer may be selected from the group consisting of an acrylic monomer, an acrylamide monomer, and combinations thereof.

Environmentally friendly dispersion system used in the preparation of inverse emulsion polymers

Methods for reducing fines migration in a porous subterranean reservoir. In certain aspects, the methods include introducing a composition including a water-soluble or dispersible branched polyhydroxyetheramine into the porous subterranean reservoir, maintaining a sufficient temperature in the porous subterranean reservoir for a period of time, adsorbing the composition onto a surface of the porous subterranean reservoir, and stabilizing at least a portion of the fines present in the porous subterranean reservoir. A treatment composition can be used and in certain aspects, the treatment composition can be a reaction product of bisphenol A, an ethanol amine, diethanol amine, and a monofunctionalized polyoxyalkyleneamine.

Chemical treatment method and additive used to treat fines migration and flow through porous media

A composition comprising crosslinked expandable polymeric microparticles capable of hydrolysis at or below neutral pH and a method of modifying the permeability to water of a subterranean formation by introducing such compositions into the subterranean formation is disclosed and claimed. This invention further relates to compositions and methods for the recovery of hydrocarbon fluids from a subterranean reservoir or formation subjected to COor COWater Alternating Gas flooding at low pH and increases the mobilization and/or recovery rate of hydrocarbon fluids present in the subterranean formations.

The present disclosure is directed to compositions and methods that may be used for enhanced oil recovery, for modifying the permeability of subterranean formations and for increasing the mobilization and/or recovery rate of hydrocarbon fluids present in the formations. The compositions may include, for example, expandable cross-linked polymeric microparticles having unexpanded volume average particle size diameters of from about 0.05 to about 5,000 microns and cross linking agent contents of from about 100 to about 200,000 ppm of labile cross linkers and from 0 to about 300 ppm of non-labile cross linkers, wherein the expandable polymeric monomers have a block copolymer structure comprising at least two different monomers having different chemical structures.

Block copolymers for recovering hydrocarbon fluids from a subterranean reservoir

The present disclosure is directed to compositions and methods for enhanced oil recovery, for modifying the permeability of subterranean formations and for increasing the mobilization and/or recovery rate of hydrocarbon fluids present in the formations. The compositions may include, for example, expandable cross-linked polymeric microparticles having unexpanded volume average particle size diameters of from about 0.05 to about 5,000 microns and cross linking agent contents of from about 100 to about 200,000 ppm of labile cross linkers and from 0 to about 300 ppm of non-labile cross linkers that may be used in combination with other components such as, for example, a second and different polymeric microparticle, a viscosified aqueous solution, a subterranean reservoir treatment, or combinations thereof.

Compositions comprising at least two different polymeric microparticles and methods for recovering hydrocarbon fluids from a subterranean reservoir

Growing community of inventors

Sugar Land, TX, United States of America

Kin-Tai Chang