Wells – Processes – In situ combustion
Patent
1983-05-03
1984-08-14
Suchfield, George A.
Wells
Processes
In situ combustion
166256, E21B 43243
Patent
active
044651350
ABSTRACT:
The present invention is directed to a method of enhanced oil recovery by fire flooding petroleum reservoirs characterized by a temperature of less than the critical temperature of carbon dioxide, a pore pressure greater than the saturated vapor pressure of carbon dioxide at said temperature (87.7.degree. F. at 1070 psia), and a permeability in the range of about 20 to 100 millidarcies. The in situ combustion of petroleum in the reservoir is provided by injecting into the reservoir a combustion supporting medium consisting essentially of oxygen, ozone, or a combination thereof. The heat of combustion and the products of this combustion which consist essentially of gaseous carbon dioxide and water vapor sufficiently decrease the viscosity of oil adjacent to fire front to form an oil bank which moves through the reservoir towards a recovery well ahead of the fire front. The gaseous carbon dioxide and the water vapor are driven into the reservoir ahead of the fire front by pressure at the injection well. As the gaseous carbon dioxide cools to less than about 88.degree. F. it is converted to liquid which is dissolved in the oil bank for further increasing the mobility thereof. By using essentially pure oxygen, ozone, or a combination thereof as the combustion supporting medium in these reservoirs the permeability requirements of the reservoirs are significantly decreased since the liquid carbon dioxide requires substantially less voidage volume than that required for gaseous combustion products.
REFERENCES:
patent: 3072185 (1963-01-01), Bond et al.
patent: 3174543 (1965-03-01), Sharp et al.
patent: 3182721 (1965-05-01), Hardy
patent: 3208519 (1965-09-01), Moore
patent: 3452816 (1969-07-01), Hardy et al.
patent: 3825066 (1974-07-01), Redford
patent: 3964545 (1976-06-01), Speller, Jr.
patent: 3978925 (1976-09-01), Redford
patent: 4026357 (1977-05-01), Redford
patent: 4252191 (1981-02-01), Pusch et al.
patent: 4418751 (1983-12-01), Emery
"Secondary and Tertiary Oil Recovery Processes", Interstate Oil Compact Commission, 1974, pp. 94, 111 and 112.
"Enhanced Oil Recovery Via Oxygen-Enriched In Situ Combustion: Test Results from the Forest Hill Field in Texas" SPE Paper No. 11218, 1978.
"Fluid Dynamics During an Underground Combustion Process," Petroleum Transactions, Aime, 1958, vol. 213, pp. 146-154.
Craig, Jr., F. F. et al., "A Multipilot Evaluation of the COFCAW Process", Journal of Petroleum Technology, Jun. 1974, pp. 659-666.
Esposito Michael F.
Hamel Stephen D.
Larcher Earl L.
Suchfield George A.
The United States of America as represented by the United States
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