Ecolab USA Inc.

Championx USA Inc.

Tri Phan

Duy T Nguyen

Jenny L Phan

Marcus D Faust, Jr

Tzu-ping Hsu

Theophilus Edovia

Mathew Hancock

Matthew Hancock

Marcus Faust

Disclosed herein are compositions and methods for increasing recovery, or flowback, of hydrocarbon compounds from hydrocarbon-containing subterranean reservoirs. The flowback compositions include an anionic sulfonated surfactant, an amphoteric surfactant, water, and a coupling agent. The flowback compositions convert oil-wet rocks to water-wet, yet exhibit a low tendency of composition components to sorb to the rock. The flowback compositions do not cause formation of emulsions with hydrocarbon compounds within the subterranean environment. The flowback compositions are particularly useful for increasing the yield of hydrocarbons recovered from tight shale reservoirs.

Compositions for enhanced oil recovery

The present invention generally relates to methods for removing deposits in an oil or gas well by contacting the annular fluid in a batch-wise method with an effective amount of a composition comprising a water-soluble copolymer. These methods are advantageous because they can be used as needed to improve well operation. The methods use a water-soluble copolymer comprised of an acrylamide monomer and one or more cationic monomer.

Cleaning and removal of wax deposits in oil and gas wells using cationic polymers

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Sugar Land, TX, United States of America

Tri Phan