In-situ reduction of oil viscosity during steam injection proces

Details In-situ reduction of oil viscosity during steam injection proces In-situ reduction of oil viscosity during steam injection proces

1991-12-02

1993-05-11

Suchfield, George A.

Wells

Processes

Heating, cooling or insulating

E21B 4324

Patent

active

052092950

ABSTRACT:
A method for lowering the viscosity of a heavy hydrocarbon in situ in a well formation so as to improve well production wherein the heavy hydrocarbon has an API gravity in the range between 6.degree. and 12.degree. and a dynamic viscosity in the range between 300 and 900 centipoises @ 195.degree. F. comprising lowering the viscosity of a virgin heavy hydrocarbon outside of a well formation wherein said heavy hydrocarbon has an API gravity in the range between 6 and 12 degrees and a dynamic viscosity above 300 centipoises @ 195.degree. F. so as to make pumpable with conventional pumping equipment comprising mixing said hyrdocarbon at a temperature range between 400.degree. and 500.degree. F. with steam and an additive selected.

REFERENCES:
patent: 4227575 (1980-10-01), Nooner
patent: 4503911 (1985-03-01), Hartman et al.
patent: 4549609 (1985-10-01), Watkins et al.
patent: 4572296 (1986-02-01), Watkins
patent: 4580633 (1986-04-01), Watkins et al.
patent: 4982789 (1991-01-01), Prukop
patent: 5105887 (1992-04-01), Hewgill et al.

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