Mobil Oil Corporation

Leonard V Grego

Craig H Phelps

Ricky C Ng

A method for selectively closing an intermediate zone of a near wellbore area in a formation. Initially, a drillable mechanical packer is placed into the wellbore below the intermediate zone. The wellbore area adjacent to the intermediate zone is cooled to a critical temperature between about 130.degree. to about 180.degree. F. Subsequently, a novolac or resole-type phenolformaldehyde resin containing an acid catalyst is placed into the wellbore where it forms a solid platform over the packer and intermediate zone in about 2 hours. The critical temperature is maintained in the wellbore and intermediate zone while placing a second resinous material containing an alkaline catalyst into the wellbore and intermediate zone. Thereafter, the second material forms a steam resistant solid gel in the intermediate zone, thereby closing it.

Growing community of inventors

Bakersfield, CA, United States of America

Leonard V Grego