Method of oil/gas well stimulation

E - Fixed Constructions – 21 – B

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E21B 43/26 (2006.01) C09K 8/64 (2006.01) C09K 8/72 (2006.01) C09K 8/86 (2006.01) E21B 43/25 (2006.01) E21B 43/27 (2006.01)

Patent

CA 2405154

Stimulation, particularly fracturing or acidising, of hydrocarbon wells having bores leading to hydrocarbon bearing uses a fluid including a continuous phase of or including a compound of the formula (I): (R2)p-Ph-(CH2)m-COO-(AO)n-R1 where R1, AO, n, m, Ph, R2 and p have defined meanings and particularly where the esters are alkyl or alkenyl benzoate esters. These esters are beneficial by having a range of viscosities, especially extending to low viscosities, and attractive toxicological and environmental profiles for use in well stimulation.

Le traitement, et plus particulièrement la fracturation ou l'acidification, de puits d'hydrocarbures comprenant des puits conduisant à des formations contenant des hydrocarbures, utilise un fluide comprenant une phase continue à base du composé représenté par la formule générale (I) (R?2¿)¿p?-Ph-(CH¿2?)¿m?-COO-(AO)¿n?-R?1¿, dans laquelle R?1¿, AO, n, m, Ph, R?2¿ et p représentent des éléments définis, et en particulier dans laquelle les esters sont des esters de benzoate d'alkyle ou d'alcényle. Ces esters sont avantageux du fait de leurs viscosités, en particulier orientées vers de faibles viscosités, et intéressants pour leurs profiles toxicologiques et environnementaux, permettant leur utilisation dans le traitement d'un puits.

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