Oil recovery optimization using a well having both horizontal and vertical sections
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United States of America Patent
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Aug 23, 1994
Grant Date -
N/A
app pub date -
Dec 10, 1992
filing date -
Dec 10, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A steam, carbon dioxide, or solvent injection method is used in combination with a cased well completed to have an upper vertical section, a lower vertical section and a horizontal section which connects the two vertical sections. Steam, carbon dioxide, or solvent is injected down tubing in the well and through perforations near the lower portion of the lower vertical section of the well and into an oil-bearing formation that is penetrated by the well. Oil is produced from the formation via perforations in the casing in the upper vertical section and thence upward through the annulus formed between the tubing and the casing to the surface of the earth for recovery.
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