C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 8/68 (2006.01) C09K 8/512 (2006.01)
Patent
CA 2709984
A process to prepare a solution of zirconium-alkanolamine-hydroxycarboxylic acid complex is disclosed and use of the solution in oil field applications such as hydraulic fracturing and plugging of permeable zones. The process comprises contacting an alcohol solution of a zirconium complex with an alkanolamine, then with an a-hydroxycarboxylic acid to produce a solution of zirconium-alkanolamine-hydroxycarboxylic acid complex. The solution is particularly suitable for use in a cross-linking compo-sition in hydraulic fracturing and plugging of permeable zones of subterranean formations at temperatures of 275°F (135°C) and higher in the formation.
La présente invention concerne un procédé de préparation d'une solution d'un complexe de zirconium-alcanolamine-acide hydroxycarboxylique, ainsi que l'utilisation de ladite solution dans des applications pétrolifères comme la fissuration hydraulique et l'isolement de zones perméables. Ce procédé comprend la mise en contact d'une solution alcoolique d'un complexe de zirconium avec une alcanolamine, puis avec un acide a-hydroxycarboxylique afin d'obtenir une solution d'un complexe de zirconium-alcanolamine-acide hydroxycarboxylique. Cette solution est particulièrement adaptée à une utilisation en tant que composition réticulante dans la fissuration hydraulique et l'isolement de zones perméables de formations souterraines à des températures supérieures ou égales à 135 °C dans la formation.
Deeth Williams Wall Llp
Dorf Ketal Speciality Catalyst Llc
E.i. Du Pont de Nemours And Company
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