Full-Scale Well-Model Tests of a New Chemical Plug System for Zone Isolation in Horizontal Wells

摘要

A new method for zone isolation in horizontal wells with chemical packers has been developed and tested with a 60-ft-long, full-scale horizontal-well apparatus. The method involves setting two chemi- cal wellbore plugs in the horizontal section to straddle the problem zone, squeezing gel into the problem zone. and cleaning out the borehole before production. A crosslinked hydroxyethyl cellulose was used as the wellbore plug, while a monomer gel was used to shut off the problem zone. Tests confirmed the viability of the new zone-isolation method.