LOW VOLATILE PHOSPHOROUS GELLING AGENT

摘要

Liquid hydrocarbons are gelled by the introduction of a phosphate ester and a crosslinking agent for use in oil recovery. Generally a proppant, delayed gel breaker and other modifiers are added to the gelled hydrocarbon to improve the oil recovery process. The phosphate ester used in this method and composition for oil recovery has low volatility and good stability during hydrocarbon distillation resulting in improved distillation efficiency in a refinery.

主权项

1. A method of fracturing a subterranean formation comprising the steps of:
(a) preparing a gelled liquid hydrocarbon fracturing fluid comprising a hydrocarbon liquid, a ferric iron or aluminum polyvalent metal salt of a phosphoric acid ester, said phosphoric acid ester having the formulawherein R is an alkyl group having from about 8 to about 24 carbon atoms or R is a phenyl alkyl ether having from about 2 to 12 alkyl carbon atoms and 1 phenyl group and R′ is an alkyl group having from about 4 to 8 carbon atoms, a proppant material, water and an amount of a delayed gel breaker effective to break said gelled hydrocarbon fracturing fluid; and
(b) contacting said subterranean formation with said gelled hydrocarbon fracturing fluid under conditions effective to create at least one fracture in said subterranean formation.