Wells – Processes – Heating – cooling or insulating
Patent
1991-12-16
1993-06-01
Suchfield, George A.
Wells
Processes
Heating, cooling or insulating
166 50, 166 57, 166297, E21B 4324
Patent
active
052151492
ABSTRACT:
A conduction assisted steam flooding process is described where heavy oil is recovered from reservoirs with limited native injectivity and a high water saturated bottom zone. A horizontal well is placed above the water saturated zone. This well is perforated on its top side at selected intervals. An uninsulated tubing having a circumference smaller than the well is inserted therein to its furthest end thereby making a first and second conduit. Steam is injected into the second conduit and formation fluids are removed by the first conduit or tubing until steam communication is established between the two intervals. Once steam communication is established between the intervals, steam injection is ceased and a thermal packer is placed around the tubing so as to form two separated, spaced-apart, perforated intervals. Thereafter, steam is injected into the reservoir via one interval and hydrocarbonaceous fluids are removed at the other interval.
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Hager G. W.
Malone C. A.
McKillop A. J.
Mobil Oil Corporation
Suchfield George A.
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