Method of selective treatment of open hole intervals in vertical

Details Method of selective treatment of open hole intervals in vertical Method of selective treatment of open hole intervals in vertical

1994-11-21

1996-04-16

Tsay, Frank S.

Wells

Processes

Material placed in pores of formation to treat resident...

1663051, 166 67, E21B 4312, E21B 3313

Patent

active

055073425

ABSTRACT:
A method for repairing damaged sections of an oil well includes the use of a combination of two fluids, pumped simultaneously to allow treatment of a specific part of a portion of an oil producing zone. A first fluid is pumped down a coiled tubing and a second fluid is pumped down the annulus formed by the coiled tubing and the production tubing. Because of density differences in the two fluids, diversion is facilitated, treating the lower part of the pay zone with the first fluid and the second fluid to keep the first fluid away from the upper section of the open hole. The coiled tubing could be raised or lowered during this procedure to help ensure desired zone coverage.

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