Patent ID: 8541346
Filing Date: 2013-09-24
Classification: C09K,Y10T

Abstract:
1. A method of degrading a self-degrading filter cake in a subterranean formation, comprising the step of: placing in the subterranean formation a bridging agent comprising a degradable material wherein the degradable material is selected from the group consisting of: anhydrous sodium tetraborate, anhydrous boric acid, a chitin, a chitosan, a protein, an orthoester, an aliphatic polyester, a poly(glycolide), a poly(lactide), a poly(ε-caprolactone), a poly(hydroxybutyrate), a polyanhydride, an aliphatic polycarbonate, a poly(orthoester), a poly(amino acid), a poly(ethylene oxide), a polyphosphazene, and combinations thereof; and, contacting the degradable material with water, releaseable water, or a combination thereof for a period of time such that the degradable material is dissolved thereby; wherein the filter cake was deposited within the subterranean formation by a well drill-in and servicing fluid and wherein at least a portion of the bridging agent is incorporated into the filter cake while the filter cake is deposited.