Patent ID: 7553800

Claim:
A method for forming a self-degrading filter cake in a subterranean formation, comprising: placing a well drill-in and servicing fluid in a subterranean formation, the well drill-in and servicing fluid comprising a base fluid, a viscosifier, a fluid loss control additive, a bridging agent, and an in-situ filter cake degradation composition comprising at least one delayed-release acid component selected from the group consisting of an ortho ester and a poly(ortho ester), wherein the delayed-release acid component is present in the in-situ filter cake degradation composition in an amount in the range of from about 1% to about 75% by weight, and an initiator component present in the in-situ filter cake degradation composition in an amount in the range of from about 0.1% to about 4% by weight; and forming a filter cake upon a surface within the formation.