Assessment of a vertical hydrocarbon miscible flood in the Westpem Nisku D reef
- Chevron Canada Resources Ltd. (CA)
- Chevron Oil Field Research Co., La Habra, CA (USA)
In 1981, a vertical hydrocarbon miscible flood was implemented in the Westpem Nisku D pool, one of 40 isolated carbonate pinnacle reefs in a trend located west of Edmonton, Alta., Canada. A solvent composed of methane and 15% ethane-plus components was injected into the reservoir, which is maintained at a pressure of about 4,800 psig (33 MPa). Positive indications of the location of the solvent/oil interface have been obtained from interface logging (pulsed-neutron-capture (PNC) logs) in a producing wellbore and from special analysis of core from an infill well recently drilled into the pool. Two types of chromatographic analysis of residual oil and a conventional core residual oil determination were done. The results show that the flood is gravity stable and has excellent volumetric conformance. The special core analysis provided information on the quantity and composition of residual oil saturation (ROS) in the miscibly swept zone. On the basis of these flood performance data, an estimate of ultimate recovery has been prepared.
- OSTI ID:
- 6930481
- Journal Information:
- SPE (Society of Petroleum Engineers) Reservoir Engineering; (USA), Vol. 5:2; ISSN 0885-9248
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
OIL WELLS
MISCIBLE-PHASE DISPLACEMENT
PETROLEUM
SOLVENT EXTRACTION
RESIDUAL PETROLEUM
CHEMICAL COMPOSITION
DIRECTIONAL DRILLING
ENHANCED RECOVERY
ETHANE
INJECTION WELLS
METHANE
NEUTRON LOGGING
OIL SATURATION
VERTICAL INTEGRATION
WELL LOGGING
ALKANES
DRILLING
ENERGY SOURCES
EXTRACTION
FLUID INJECTION
FOSSIL FUELS
FUELS
HYDROCARBONS
ORGANIC COMPOUNDS
RADIOACTIVITY LOGGING
RECOVERY
SATURATION
SEPARATION PROCESSES
WELLS
020300* - Petroleum- Drilling & Production
023000 - Petroleum- Properties & Composition