Steamflooding a waterflooded reservoir - performance evaluation and prediction
- Stanford Univ., Pune (India)
- Union Pacific Resrouces Co., Forth Worth, TX (United States)
- Stanford Univ., CA (United States); and others
The Wilmington Steamflood of Union Pacific Resources Co. (UPRC) at Long Beach, CA was initiated in 1989, in a previously waterflooded reservoir. Average initial reservoir oil saturation at start of the steamflood was 35%. Field production data were studied to derive an overall energy balance for the steamflood, calculate the steamflood capture efficiency, and predict further steamflood performance. Heat losses due to produced fluids were calculated. Predicted production schedules from the model were history matched with actual production data. All steamflood calculations were carried out using a PC- based spreadsheet program. The major results were as follows: The capture efficiency of the Wilmington steamflood was calculated at 60%. This is an acceptable value, taking into account the fact that the reservoir had previously been waterflooded to a low oil saturation of 35%. The calculated heat balance showed a high heat loss nor only to adjacent formations, but also through produced fluids. Of the cumulative heat injected up to the time of the study, 21% had been lost to vertical conduction and 21% through produced fluids. Predicted production schedules indicated that up to 43% of the oil in place (at steamflood initiation) would be recovered by the steamflood.
- OSTI ID:
- 269573
- Report Number(s):
- CONF-9502114-Vol.1; TRN: 96:001163-0062
- Resource Relation:
- Conference: 6. UNITAR international conference on heavy crude and tar sands on fueling for a clean and safe environment, Houston, TX (United States), 12-17 Feb 1995; Other Information: PBD: [1995]; Related Information: Is Part Of Heavy crude and tar sands -- Fueling for a clean and safe environment. Proceedings: Volume 1; Meyer, R.F. [ed.]; PB: 811 p.
- Country of Publication:
- United States
- Language:
- English
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