Wells – Processes – Distinct – separate injection and producing wells
Patent
1997-03-21
1999-02-16
Neuder, William
Wells
Processes
Distinct, separate injection and producing wells
166402, E21B 4300
Patent
active
058710531
ABSTRACT:
The invention described here is a method for using produced fluid compositions to decide how to modify injection/production strategies in oil recovery processes that involve injection of non-aqueous recovery agents ("Injectant"). The procedure is based on the premise that once a given zone is swept by injectant, most subsequent hydrocarbon recovery from that zone will occur by vaporization or extraction into the injectant. Because only the most volatile hydrocarbon components can be extracted, hydrocarbons produced by displacement can be distinguished from those produced by extraction by examining the hydrocarbon composition. Heavy, non-volatile components are recovered only by displacement. The disclosed method determines quantities of displaced vs. extracted hydrocarbons by comparing the produced hydrocarbon composition to that of the original in-place oil. Such information may be used to modify operations in order to most effectively use injectant to recover hydrocarbons from the reservoir.
REFERENCES:
patent: 5285848 (1994-02-01), Chang
patent: 5711373 (1998-01-01), Lange
McGuire, P. L. and Stalkup, F. I., "Performance Analysis and Optimization of the Prudhoe Bay Miscible Gas Project", SPE 22398, SPE International Meeting On Petroleum Engineering, Beijing, China, Mar. 24-27, 1992, pp. 719-728.
McGuire, P.L. and Moritz Jr., A. L., "Compositional Simulation and Performance Analysis of the Prudhoe Bay Miscible Gas Project", SPE 20759, 65th Annual Technical Conference And Exhibition Of The Society Of Petroleum Engineers, New Orleans, LA, Sep. 23-26, 1990, pp. 439-448.
Mizenko, G. J., "North Cross (Devonian) Unit CO2 Flood: Status Report", SPE/DOE 24210, SPE/DOE Symposium On Enhanced Oil Recovery, Tulsa, OK, Apr. 22-24, 1992, pp. 537-546.
Hervey, J. R. and Iakovakis, A.C., "Performance Review of a Miscible CO2 Tertiary Project: Rangley Weber Sand Unit, Colorado", SPE 19653, 64th Annual Technical Conference And Exhibition Of The Society Of Petroleum Engineers, San Antonio, TX, Oct. 8-11, 1989, pp. 253-265.
Stern, D., "Mechanisms of Miscible Oil Recovery: Effects of Pore-Level Fluid Distribution", SPE 22652, 66th Annual SPE Technical Conference, Dallas, TX, Oct. 6-9, 1991, pp. 579-594.
Shyeh-Yung, J. J. and Stadler, M. P., "Effect of Injectant Composition and Pressure on Displacement of Oil by Enriched Hydrocarbon Gases", SPE Reservoir Engineering, May, 1995, pp. 109-115.
Huang, W. W., Bellamy, R. B. and Onimus, S. W., "A Study of Nitrogen Injection for Increased Recovery From a Rich Retrograde Gas/Volatile Oil Reservoir", 1986 International Meeting On Petroleum Engineering, SPE 14059, Beijing, China, Mar. 17-20, 1986, pp. 157-172.
Fox, M. J., Simlote, V. N., and Beaty, W. G., "Evaluation of CO2 Flood Performance, Springer A Sand, NE Purdy Unit, Garvin County, OK", SPE/DOE 12665, SPE/DOE 4th Symposium On Enhanced Oil Recovery, Tulsa, OK, Apr. 15-18, 1984, pp. 347-351.
Exxon Production Research Company
Neuder William
VanTassel Kurt D.
LandOfFree
Method for improving oil recovery from a formation using hydroca does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for improving oil recovery from a formation using hydroca, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for improving oil recovery from a formation using hydroca will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2055652