Acidizing method for gravel packing wells

Details Acidizing method for gravel packing wells Acidizing method for gravel packing wells

1991-12-19

1993-06-29

Novosad, Stephen J.

Wells

Processes

Providing porous mass of adhered filter material in well

166281, E21B 33138, E21B 4304

Patent

active

052225569

ABSTRACT:
A method for gravel packing perforations in a wellbore where an acid is directed into the perforations so as to dissolve formation fines in channels contained in said perforations. The acid is of a strength sufficient to dissolve said fines. After the fines are dissolved, a sand consolidation agent is introduced into the perforations before the channels can be filled with formation fines. The consolidation agent remains in the perforations for a time sufficient to form a cement in situ which cement has permeability retentive characteristics. The cement forms pores of a size sufficient to exclude formation fines from the wellbore. Thereafter, a substantially fines free hydrocarbonaceous fluid is produced from the wellbore.

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