{HEAD ~ The enclosure member} is permeable to {TAIL ~ at least one fluid} in the subterranean formation or injected with the capsules such that upon sufficient exposure to the fluid, the capsules rupture, thereby releasing the breaker to the formation 
is permeable to
{ HEAD ~ The enclosure member } is permeable to { TAIL ~ at least one fluid } in the subterranean formation or injected with the capsules such that upon sufficient exposure to the fluid , the capsules rupture , thereby releasing the breaker to the formation
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH