Compositions: coating or plastic – Coating or plastic compositions – Alkali metal silicate containing
Patent
1993-05-18
1994-11-08
Green, Anthony
Compositions: coating or plastic
Coating or plastic compositions
Alkali metal silicate containing
106600, 106603, 106638, 106802, 166261, 166292, 166294, 252 8551, 405266, 405267, 405269, C04B 1204, E21B 3313
Patent
active
053623185
ABSTRACT:
A sand consolidating method is provided for use in a borehole within an unconsolidated or loosely consolidated oil or gas reservoir which is likely to introduce substantial amounts of sand into the borehole and cause caving. After perforating the borehole's casing at an interval of the formation where sand will be produced, an aqueous silicate solution is injected into said interval. Next, a spacer volume of a water-immiscible hydrocarbonaceous liquid is introduced into the interval. Thereafter, a water-miscible organic solvent containing an alkylpolysilicate and inorganic salt or chelated calcium is injected into the interval. A permeability retentive silicate cement is formed in the interval. Injection of the aqueous silicate and organic solvent is continued until the interval has been consolidated by the silicate cement to an extent sufficient to prevent sand migration and thereby prevent caving.
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Green Anthony
Hager Jr. George W.
Malone Charles A.
Marcheschi Michael
McKillop Alexander J.
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