Wells – Processes – Graveling or filter forming
Patent
1991-12-19
1993-06-15
Suchfield, George A.
Wells
Processes
Graveling or filter forming
166281, 166292, 166294, 166300, E21B 33138, E21B 4304, E21B 4327
Patent
active
052190269
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 three slug sand consolidating agent is introduced into the perforations before the channels can be filled with formation fines. The consolidating agent remains in the perforations for a time sufficient to form a silicate 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, the wellbore is packed with gravel to remove any escaping fines from hydrocarbonaceous fluids produced to the surface.
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Donlon William P.
Jones Lloyd G.
Shu Paul
Strom E. Thomas
Hager G. W.
Malone C. A.
McKillop A. J.
Mobil Oil Corporation
Suchfield George A.
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