Method of producing viscous oil from subterranean formations
Patent
·
OSTI ID:7160448
This patent describes a method for producing viscous oil from a subterranean formation penetrated by an injection well and a spaced apart production well. The method comprising the steps of: establishing fluid flow communication between the injection well and the production well in a flow path along lower portions of a formation pay zone containing the viscous oil; heating the flow path and adjacent portions of the pay zone by injecting hot water or low quality steam into and through the flow path for a time sufficient to raise the temperature of the adjacent pay zone and viscous oil to a temperature at least sufficient to liquify the viscous oil and make it mobile in the heated zone and displaceable by hot water; injecting alternating slugs of hot water and steam through the injection well and into the pay zone overlying the heated flow path to cause the viscous oil in the pay zone to liquify and drain into the heated flow path and to be displaced toward the production well by hot water; subsequent to the last step, displacing substantially all of the oil in the heated path by hot water; and recovering produced fluids through the production well.
- Assignee:
- Amoco Corp., Chicago, IL
- Patent Number(s):
- US 4874043
- Application Number:
- PPN: US 7246223A
- OSTI ID:
- 7160448
- Country of Publication:
- United States
- Language:
- English
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