IN-SITU COMBUSTION RECOVERY PROCESS USING SINGLE HORIZONTAL WELL TO PRODUCE OIL AND COMBUSTION GASES TO SURFACE
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United States of America Patent
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N/A
Issued Date -
Mar 28, 2013
app pub date -
Dec 10, 2010
filing date -
Mar 30, 2010
priority date (Note) -
Abandoned
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Abstract
An in-situ combustion process which process does not employ one or more separate gas venting wells. At least one vertical production well having a substantially vertical portion extending downwardly into the reservoir and a horizontal leg portion extending horizontally outwardly therefrom completed relatively low in the reservoir is provided. At least one vertical oxidizing gas injection well, positioned above and in spaced relation to the horizontal well, is positioned laterally along the horizontal well approximately midsection thereof. Oxidizing gas is injected therein and combustion fronts are caused to progress outwardly from such injection well in mutually opposite directions along the horizontal well. Preferably a plurality of injection wells are provided along the direction of the horizontal well, and oxidizing gas is injected in each and combustion fronts caused to progress outwardly and in opposite directions from each, and oil is caused to drain down into the horizontal well, which oil along with hot combustion gases is produced to surface.
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