North Stanley Polymer Demonstration Project. Third annual and final report
Technical Report
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OSTI ID:6540940
The North Stanley Polymer Enhanced Water Flood Project in Osage County OK, was a joint venture between Kewanee Oil Company and the Department of Energy (Energy Technology Branch). The contract, identified as Contract Number ET-76-C-03-1805 was begun in July 1975 and concluded in August 1978. Polymer injection was concluded in June 1977 after a 17.3% pore volume slug of polymer had been injected. This was then followed by a 4.8% pore volume slug of freshwater. In October 1977, sufficient freshwater had been injected to prevent saltwater degradation of the polymer, and the injection system was converted to produced water reinjection. The North Stanley production response started two months after beginning polymer injection, so it appears that a large portion of the tertiary oil was due to the proprietary Channelblock treatments performed at the onset of polymer injection. These treatments were primarily used to correct injection profile problems and to reduce high-volume injection wells, but it is suspected that significant redistribution of flow occurred from their treatments. This redistribution of flow was responsible for the quick oil response rather than oil banking in front of the polymer slug. Sequential injection of polymer was probably beneficial, but perhaps a larger and more prolonged response would have been realized if more polymer had been used in conjunction with a cross-linking compound, such as sodium dichromate or aluminum citrate. Assuming that the project's production will continue on the present trend, the project will be successful and should recover the 900,000--1,000,000 barrels of tertiary oil initially anticipated. Unfortunately, since 85% of the North Stanley oil is classified as old oil, the pre-tax rate of return for the project (including the DOE contribution of $1,339,600) will only be 11%. By industry standards this would be considered insufficient for the risk involved.
- Research Organization:
- Kewanee Oil Co., Shidler, OK (USA)
- OSTI ID:
- 6540940
- Report Number(s):
- BETC/RI-78/19
- Country of Publication:
- United States
- Language:
- English
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