Chevron U.s.a. Inc.

Chevron Oronite Company LLC

Gayani W Pinnawala

Varadarajan Dwarakanath

Gregory Arthur Winslow

Taimur Malik

Nabijan Nizamidin

Guo-Qing Tang

Dennis Arun Alexis

Sujeewa S Palayangoda

Sophany Thach

Harold Charles Linnemeyer

Sumitra Subrahmanyan

Les Leszek Jackowski

Timothy P Theriot

Francesca Cibotti

Dustin Luke Walker

Tetsuo Art Inouye

Dustin J Lowry

Curtis Bay Campbell

Andrew Michael Thomas

Ping Wang

Jordan Taylor Isbell

Andrew M Davidson

Kerry Kennedy Spilker

Do Hoon Kim

Mohsen S Tagavifar

Mohamad Salman

Michael Ogechukwuka Unomah

Gojko Matovic

Samuel Wei-en Lau

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

Described herein are compositions and methods that stabilize an injection fluid when exposed to reservoir conditions, reducing formation damage and increasing the amount of hydrocarbon recovered. Specifically, the formulation is a single-phase liquid surfactant package which comprises an anionic surfactant and optionally one or more secondary surfactants.

Injection fluids comprising an anionic surfactant for treating unconventional formations

The present disclosure is directed to surfactants (in particular olefin sulfonates), surfactant packages, compositions derived thereof, and uses thereof in hydrocarbon recovery. Methods of making olefin sulfonate surfactants are also described.

Olefin sulfonates

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.

Described are compositions and methods for use in oil and gas operations. The methods can decrease pressure drop along a lateral segment of a wellbore in an unconventional subterranean formation.

Compositions containing friction reducers and methods of using thereof in oil and gas operations

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

Methods of using olefin sulfonates

Olefin sulfonate compositions

Disclosed herein are methods and composition for breaking foam, emulsions, or any combination thereof.

Compositions and methods for breaking foams and emulsions

Embodiments of the disclosure include compositions and methods that stabilize a injection fluid when exposed to reservoir conditions, reducing formation damage and increasing the amount of hydrocarbon recovered. Specifically, the formulation is a single-phase liquid surfactant package which comprises a surfactant and optionally one or more secondary surfactants. Also provided are methods of using the stabilized injection fluids in stimulation operations.

Injection fluids for stimulating fractured formations

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Katy, TX, United States of America

Gayani W Pinnawala