Wells – Processes – Providing porous mass of adhered filter material in well
Patent
1990-12-03
1992-04-07
Suchfield, George A.
Wells
Processes
Providing porous mass of adhered filter material in well
166293, 166300, E21B 3313, E21B 4304, E21B 4312
Patent
active
051019019
ABSTRACT:
A method for forming a gravel pack in a washed-out interval is provided where a borehole penetrates an unconsolidated or loosely consolidated oil or gas reservoir which is likely to introduce substantial amounts of sand into the borehole. After perforating the borehole's casing at a washed-out interval of the formation, sand is introduced into the interval. Afterwards, an aqueous solution of potassium silicate is injected into said interval. Thereafter, an alcoholic solution of hydrated calcium chloride is injected into the interval. A permeability retaining calcium silicate cement is formed in the interval thereby making a gravel pack. Injection of the potassium silicate and hydrated calcium chloride solutions is continued until the porosity of the interval has been reduced by the calcium silicate cement to an extent sufficient to exclude formation fines and sand.
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Donlon William P.
Shu Paul
Strom E. Thomas
Malone Charles A.
McKillop Alexander J.
Mobil Oil Corporation
Speciale Charles J.
Suchfield George A.
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