Wells – Processes – Cementing – plugging or consolidating
Patent
1980-11-06
1982-11-30
Novosad, Stephen J.
Wells
Processes
Cementing, plugging or consolidating
166270, 166273, E21B 33138, E21B 4322
Patent
active
043611869
ABSTRACT:
A method of selectively blocking high permeability flow channels in an underground hydrocarbon material bearing formation having flow channels of high permeability and having flow channels of lesser permeability. The method includes the steps of introducing a blocking material fluid comprising a blocking material in a carrier into the flow channels through an injection well in communication with the formation, introducing a buffer fluid into the formation through the injection well for the buffer fluid to displace the blocking material fluid away from the injection well, allowing the blocking material to settle in the channels to resist displacement by fluid flowing through the channels, introducing a quantity of an activating fluid into the channels through the injection well at a sufficient rate for the activating fluid to displace the buffer fluid and finger into the high permeability channels to reach the blocking material in the high permeability channels without reaching the blocking material in the low permeability channels, the activating fluid being adapted to activate the blocking material which it reaches to cause blocking of the high permeability channels.
REFERENCES:
patent: 2747670 (1956-05-01), King et al.
patent: 2761511 (1956-09-01), Billue
patent: 3251414 (1966-05-01), Willman
patent: 3323589 (1967-06-01), Harvey
patent: 3396790 (1968-08-01), Eaton
patent: 3724549 (1973-04-01), Dill
patent: 3762475 (1973-10-01), Marx
patent: 3762476 (1973-10-01), Gall
patent: 3805893 (1974-04-01), Sarem
patent: 4182417 (1980-01-01), McDonald et al.
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