Process for increasing oil recovery by miscible displacement
This is a miscible displacement method which involves a linear, gas-driven gravity-controlled flow mechanism. The formation is fractured and a condensible gas is injected into the fracture which has a substantial degree of miscibility with the reservoir oil. Thereafter a relatively non-condensible gas is injected through the fracture and into the reservoir. The volume of the non-condensible gas is sufficient to raise the reservoir pressure at least 50 psi above the vapor pressure of the condensible gas. Injection of the non-condensible gas is then stopped and oil is produced through the fracture with a controlled back pressure to offset the tendency of the miscible liquid to finger through the reservoir oil. (7 claims)
- Assignee:
- Esso Production Res Co.
- Patent Number(s):
- US 3263751
- OSTI ID:
- 6760374
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
ALKANES
COMMINUTION
ENERGY SOURCES
ENGINEERING
ENHANCED RECOVERY
FLUID FLOW
FLUID INJECTION
FOSSIL FUELS
FRACTURING
FUELS
GAS INJECTION
HYDROCARBONS
MISCIBLE-PHASE DISPLACEMENT
OIL WELLS
ORGANIC COMPOUNDS
PETROLEUM
PHYSICAL PROPERTIES
RECOVERY
RESERVOIR ENGINEERING
STIMULATION
THERMODYNAMIC PROPERTIES
VAPOR PRESSURE
WELL STIMULATION
WELLS