Wells – Processes – Cementing – plugging or consolidating
Patent
1992-07-31
1994-03-15
Suchfield, George A.
Wells
Processes
Cementing, plugging or consolidating
166300, E21B 33138
Patent
active
052939391
ABSTRACT:
Disclosed are methods for treating wells to form a permeable barrier around the well for consolidating unconsolidated mineral particles such as sand in a subterranean petroleum formation penetrated by a well, or for forming an impermeable barrier for fluid entry control, or for plugging the well for abandonment. A fluid containing a polymerizable resin such as furfuryl alcohol oligomer or monomer, a polar organic diluent such as butyl acetate a dense solvent having density greater than the resin density, and an oil soluble acid catalyst to cause polymerization of the resin at formation temperatures is prepared. The dense solvent is bromobutane, bromobenzene, furfural, tetrachloroethane, tetrachloroethylene, tetrabromoethane, 1,2,4 trichlorobenzene and 1,2,3 tribromopropane or mixtures thereof. The amount of dense solvent is selected to ensure that the treating fluid density is greater than the density of the formation fluid, preferably at least 10 greater than the density of the formation fluid.
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Fader Philip D.
Surles Billy W.
Bailey James L.
Park Jack H.
Priem Kenneth R.
Suchfield George A.
Texaco Chemical Company
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