IMPROVED PERFORMANCE OF CROSSLINKED FRACTURING FLUIDS COMPRISING A NONIONIC SURFACTANT

摘要

A gel composition for use in subterranean formations is disclosed. The composition can comprise a base fluid, a cross-linkable polymer that is soluble in the base fluid, a nonionic surfactant and a cross-linking agent. The gel composition has improved crosslinked stability. The gel composition can be injected into the subterranean formation as a fracturing fluid and allowed to penetrate the formation. Preferably, the gel composition effectively blocks the water-bearing regions while the oil or gas producing regions are left unblocked so that the oil or gas can be recovered.