Viscoelastic fluids containing hydroxyethyl cellulose

Details Viscoelastic fluids containing hydroxyethyl cellulose Viscoelastic fluids containing hydroxyethyl cellulose

C - Chemistry, Metallurgy

09

K

C09K 8/68 (2006.01) C09K 8/70 (2006.01) C09K 8/90 (2006.01) E21B 43/26 (2006.01)

Patent

CA 2688202

An aqueous viscoelastic fluid for enhancing the productivity of a subterranean formation contains, in addition to an anionic surfactant and a cationic surfactant, hydroxyethyl cellulose (HEC). The fluid may be pumped neat into the formation, foamed with nitrogen to qualities exceeding 90% or emulsified with liquid carbon dioxide to emulsion quality approaching 90%.

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