Chevron U.s.a. Inc.

Texaco Inc.

Chevron Oronite Company LLC

Gregory Arthur Winslow

Varadarajan Dwarakanath

Taimur Malik

Sophany Thach

Gayani W Pinnawala

Dennis Arun Alexis

Robert George Shong

Harold Charles Linnemeyer

Sumitra Subrahmanyan

Sujeewa S Palayangoda

Timothy P Theriot

Les Leszek Jackowski

Gayani Pinnawala Arachchilage

Francesca Cibotti

Do Hoon Kim

Nabijan Nizamidin

Dale F Brost

Aaron Wilhelm

Guo-Qing Tang

Chao Yan

Wei Wang

Wei Wei

Jordan Taylor Isbell

Kerry Kennedy Spilker

Baosheng Liang

Marlon Solano

Frank M Rexach

Judith A Newton

Douglas G Naae

Stephen L Long

Dengen Zhou

Gabriel Prukop

Amos Sunghyun Kim

Xinghui Liu

Oya Aysen Karazincir

Wade H Williams

Mohamad Salman

David L Gebert

Robert Brian Atkinson

Lauren N DeVoe

Soong Hay Tam

Alicia Sanchez

Clinton C Terry

Sam Kidd

Varadarajab Dwarakanath

Jimin Daniel Zhou

Reza Banki

Lin Zuo

The present disclosure is directed to polyanionic surfactants, surfactant mixtures, compositions derived thereof, and uses thereof such as in oil and gas operations. Methods of making polyanionic surfactants are also described.

Polyanionic surfactants and methods of making and using thereof

A method for evaluating a fluid to reduce a deposition of a solid within a fractured subterranean formation may include obtaining information about materials inside of a testing vessel, where the materials are designed to be representative of the fractured subterranean formation. The method may also include providing a fluid that flows through the materials inside the testing vessel for a period of time, where the testing vessel is subjected to conditions designed to be representative of downhole conditions of the fractured subterranean formation. The method may also include evaluating the material to characterize the deposition of the solid on at least some of the materials after the period of time.

Assessing and reducing deposition of scales and other solids

A method for evaluating a chemical treatment at a subsurface for improved well performance may include obtaining information about a post-reaction fluid that results from a fluid flowing through a testing vessel for a period of time, where the testing vessel comprises a plurality of materials, where the plurality of materials is designed to be representative of the subsurface, and where the plurality of materials comprises rock and proppant. The method may also include performing, using the information, a compatibility test on the post-reaction fluid and the plurality of materials after the period of time. The method may further include evaluating, after performing the compatibility test, an effect of the post-reaction fluid on the plurality of materials.

Optimizing chemical treatment at the subsurface for improved well performance

The present disclosure is directed to polyanionic surfactants, surfactant mixtures, compositions derived thereof, and uses thereof in hydrocarbon recovery. Methods of making polyanionic surfactants are also described.

Provided herein are compositions comprising borate-acid buffers, as well as methods of using these compositions in oil and gas operations, including enhanced oil recovery (EOR) operations, fracturing operations, stimulation operations, etc.

Use of a borate-acid buffer in oil and gas operations

Embodiments of treating fluid comprising hydrocarbons, water, and polymer being produced from a hydrocarbon-bearing formation are provided. One embodiment comprises adding a concentration of a viscosity reducer to the fluid to degrade the polymer present in the fluid and adding a concentration of a neutralizer to the fluid to neutralize the viscosity reducer in the fluid. The addition of the concentration of the viscosity reducer is in a sufficient quantity to allow for complete chemical degradation of the polymer prior to the addition of the concentration of the neutralizer in the fluid such that excess viscosity reducer is present in the fluid. The addition of the concentration of the neutralizer is sufficiently upstream of any surface fluid processing equipment to allow for complete neutralization of the excess viscosity reducer such that excess neutralizer is present in the fluid prior to the fluid reaching any of the surface fluid processing equipment.

Treating fluid comprising hydrocarbons, water, and polymer

Described herein are methods of treating fluid including hydrocarbons, water, and polymer being produced from a hydrocarbon-bearing formation. The methods include adding a concentration of a viscosity reducer to the fluid to degrade the polymer present in the fluid and adding a concentration of a neutralizer to the fluid to neutralize the viscosity reducer in the fluid. The viscosity reducer is buffered at a pH of 7 or less. The addition of the concentration of the viscosity reducer is in a sufficient quantity to allow for complete chemical degradation of the polymer prior to the addition of the concentration of the neutralizer in the fluid such that excess viscosity reducer is present in the fluid.

Ph control in fluid treatment

A method for evaluating and optimizing scale management at a subsurface for improved well performance may include performing multiple first tests, where each first test combines a first fluid with a second fluid, wherein the first fluid comprises a concentration of a scale inhibitor and a chemistry of additional fluid components. The method may also include identifying an optimal mixture of the first fluid among the first tests, where the optimal mixture comprises a minimum concentration of the scale inhibitor that reduces scale deposition. The method may further include performing a second test that combines the first fluid with the scale inhibitor, the second fluid, and rock. The method may also include evaluating a concentration of the scale inhibitor in aqueous phase after a period of time after initiating the second test. The method may further include identifying a target fluid for use in a field operation at the subsurface.

Optimizing scale management at the subsurface for improved well performance

The present disclosure relates to the use of a multicarboxylate, such as an alkyl alkoxy dicarboxylate, in enhanced oil recovery processes. Embodiments relate to an aqueous stream and the use thereof. The aqueous stream includes a compound having the chemical formula: R—R—R, wherein Rincludes a branched or unbranched, saturated or unsaturated, cyclic or non-cyclic, hydrophobic carbon chain having an oxygen atom linking Rand R; Rincludes an alkoxylated chain comprising ethylene oxide, propylene oxide, butylene oxide, or a combination thereof; and Rincludes a branched or unbranched hydrocarbon chain and 2-5 —COOH or —COOM groups wherein M is a monovalent, divalent, or trivalent cation. Rincludes 2-12 carbon atoms.

Method of using multicarboxylate compositions in enhanced oil recovery

Disclosed are foam precursor compositions, foamed compositions, and methods of using these foamed compositions for the stimulation of unconventional reservoirs.

Methods for foam stimulation

Disclosed are compositions and methods for use in oil and gas operations.

Compositions for use in oil and gas operations

Methods for use in oil and gas operations

Growing community of inventors

Houston, TX, United States of America

Gregory Arthur Winslow