Controlled gel breaker

Details Controlled gel breaker Controlled gel breaker

E - Fixed Constructions

21

B

E21B 43/26 (2006.01) C09K 8/64 (2006.01) E21B 43/28 (2006.01)

Patent

CA 2251366

Hydrocarbon fracturing fluids are made by combining organic phosphate esters with polyvalent metal salts in hydrocarbon carriers to form gels; breaking of the gel is retarded or otherwise controlled over a wide range of water concentrations through the use of slowly soluble alkaline earth metal compounds, preferably hard burned magnesium oxide, which may be added along with the gel component. The slowly soluble alkaline earth metal compound is employed together with an oily acid breaker retarding agent such as tall oil.

Fluides de fracturation d'hydrocarbures réalisés par combinaison des esters phosphoriques organiques avec des sels métalliques polyvalents dans des supports hydrocarbures pour former des gels. L'action de fragmentation du gel est retardée ou régulée pour une large gamme de concentrations aqueuses, par l'utilisation de composés de métal alcalino-terreux à dissolution lente, de préférence d'oxyde de magnésium dur, qui peut être ajouté au composant du gel. Le composé de métal alcalino-terreux à dissolution lente est utilisé de pair avec un agent huileux acide retardateur de fragmentation, par exemple un tall-oil.

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