Composition and process for well cleaning

C - Chemistry – Metallurgy – 09 – K

Patent

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Details

C09K 8/36 (2006.01) C09K 3/00 (2006.01) C09K 8/28 (2006.01) C09K 8/52 (2006.01) E21B 37/00 (2006.01)

Patent

CA 2478433

Disclosed is a microemulsion well treatment microemulsion that is formed by combining a solvent-surfactant blend with a carrier fluid. In preferred embodiments, the solvent-surfactant blend includes a surfactant and a solvent selected from the group consisting of terpenes and alkyl or aryl esters of short chain alcohols. The disclosed well treatment microemulsion can be used in well remediation, stimulation and hydrogen sulfide mitigation operations. Additionally, the well treatment microemulsion can be used in the production of benzothiophenes through interaction with hydrogen sulfide.

L'invention concerne une micro-émulsion de traitement de puits qui est formée par combinaison d'un mélange de solvants-surfactants avec un fluide porteur. Dans des modes de réalisation préférés, ledit mélange de solvants-surfactants comprend un surfactant et un solvant sélectionnés dans le groupe constitué de terpènes et d'esters d'alkyle ou d'aryle d'alcools à chaîne courte. L'émulsion de traitement de puits de l'invention peut être utilisée dans des opérations de restauration de puits, de stimulation et d'atténuation en sulfure d'hydrogène. De plus, la micro-émulsion de traitement de puits peut être utilisée dans la production de benzothiophènes par l'interaction avec du sulfure d'hydrogène.

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