Recovery of oil by in-situ combustion followed by in-situ hydrogenation
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United States of America Patent
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Sep 8, 1987
Issued Date -
N/A
app pub date -
Sep 15, 1986
filing date -
Sep 25, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Oxygen is injected into a petroleum bearing subsurface formation penetrated by production well and the petroleum in the formation is subjected to in-situ combustion to heat the formation in a zone surrounding the production well. After heating by the in-situ combustion, heated hydrogen is injected into the heated formation zone by way of the production well. By way of another well penetrating the petroleum bearing subsurface formation and spaced from the production well, fluid is injected into the formation to drive petroleum in the formation between the two wells to the production well for recovery. Hydrogenation of the petroleum occurs in the heated zone in the presence of hydrogen therein.
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