Recovery of crude petroleum from a plural strata by hot fluid drive
Patent
·
OSTI ID:6705182
This is an improved process for producing crudes of extremely low API gravity. A hot fluid, such as superheated HD2UO, is passed through a permeable stratum, free of oil and lying adjacent to a permeable oil-bearing stratum, but separated therefrom by an impermeable barrier. The oil- bearing stratum and its oils are thereby heated to an elevated temperature, which greatly reduces the viscosity of the crude oil. While the crude oil is in this heated condition, a fluid flushing or displacing agent is forced through the oil-bearing stratum to force the oil into a production well, from which it is produced in a conventional manner. The temperature of the preheating fluid ranges from about 300 to 750$, depending upon the character of the crude to be produced. The injection well can be either a central injection well of a conventional 5,7, or 9-spot well pattern, or an injection well in a line of injection wells. (11 claims)
- Assignee:
- TUL; EDB-81-025624
- Patent Number(s):
- US 3167120
- OSTI ID:
- 6705182
- Country of Publication:
- United States
- Language:
- English
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