FLUID LOSS CONTROL PILL WITH INTERNAL BREAKER AND METHOD

摘要

A method of treating a subterranean formation. The method may include providing a fluid loss control pill that comprises an aqueous base fluid, a gelling agent, and an internal breaker that is selected from the group consisting of inorganic delayed acids or inorganic salts. The method can include introducing the fluid loss control pill into a subterranean formation, allowing the internal breaker to reduce the viscosity of the pill after a delay period, and allowing the fluid loss control pill to break.

主权项

1. A method of treating a subterranean formation comprising the steps of:
a) providing a fluid loss control pill comprising a plurality of encapsulated particles in a base fluid, wherein each encapsulated particle comprises a polymer coating encapsulating an internal breaker; b) introducing the fluid loss control pill into a wellbore in a subterranean formation; c) allowing the fluid loss control pill to prevent loss of a wellbore fluid from the wellbore into the subterranean formation; and d) allowing the internal breaker within each encapsulated particle to be released from the polymer coating after a delay time period such that the fluid loss control pill is allowed to break.