Patent ID: 8567503
Filing Date: 2013-10-29
Classification: C09K

Abstract:
1. A method of improving permeability regain of a portion of a subterranean formation, the method comprising: providing a portion of a subterranean formation having a first permeability; providing a first treatment fluid comprising a carrier fluid, a multivalent chelating agent, and a scale control agent, introducing the first treatment fluid into the portion of the subterranean formation from a well bore; then placing a second treatment fluid in the portion of the subterranean formation, the second treatment fluid comprising a viscoelastic surfactant; treating the subterranean formation with the second treatment fluid in a subterranean operation; and allowing the component to interact with a surfactant gel damage residue resulting from the second treatment fluid so as to increase the permeability of the subterranean formation to a second permeability, the second permeability being greater than the first permeability and showing a permeability regain of greater than 26%.