Wells – Processes – Heating – cooling or insulating
Patent
1975-05-16
1976-11-02
Novosad, Stephen J.
Wells
Processes
Heating, cooling or insulating
166306, E21B 4316, E21B 4324
Patent
active
039891089
ABSTRACT:
The invention is a method for preventing water from entering a well in communication with a subterranean hydrocarbon reservoir wherein the well is completed in a hydrocarbon reservoir that contains a water column below the hydrocarbon. The well will or will very nearly transverse a portion of the water column. The well is completed in such a way that fluid may be injected into the lower portion of the reservoir through the well without communicating inside the well with fluid being produced through the well from the upper portion of the reservoir. Cold fluid is injected through the well into the lower portion of the reservoir near the water column while production at the same volmetric rate is taken through the well from the upper portion of the reservoir. The production is comprised mainly of the previously injected fluid. This cold fluid removes heat from the water column until the water freezes forming an ice barrier to fluid flow. After a sufficient ice barrier is formed, the rate of injection is reduced to a rate sufficient just to maintain the already formed ice barrier. The production rate is maintained at a rate higher than the reduced injection rate so that hydrocarbons from the reservoir are produced along with the injected fluid.
REFERENCES:
patent: 1342781 (1920-06-01), Vedder
patent: 2923356 (1960-02-01), Glass et al.
patent: 3301326 (1967-01-01), NcNamer
patent: 3559737 (1971-02-01), Ralstin
patent: 3613792 (1971-10-01), Hyde et al.
Novosad Stephen J.
Priem Kenneth R.
Ries C. G.
Texaco Inc.
Whaley T. H.
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