North Stanley Polymer Demonstration Project. First annual report
The objective of the project is to demonstrate the efficiency and economics of recovering tertiary oil from a highly heterogenous reservoir (which has been successfully waterflooded, but is nearing the economic limit) by injecting a polymer slug of tapered concentrations to improve the sweep efficiency of the reservoir. In preparation for the injection of polymer, a major review of the mechanical condition of all producing and injection wells prompted a number of remedial workovers. As a preventive measure, all injection wells were equipped with plastic coated tubing, and packers were set approximately 100 ft above the Burbank sand to prevent the possibility of subsequent casing leaks thieving off injected polymer. Where necessary, producing wells were worked over to insure maximum producing capability. The remedial work was done at the start of the project to insure that any production increase resulting from the remedial work was recognized prior to the start of polymer injection. The necessary surface facility changes were made to allow the injection of fresh water only and to provide for the disposal of 35,000 BPD of produced water. Polymer storage and blending facilities were constructed in such a manner as to allow control of the mixing process with a minimum of supervision and manpower. In September a one well mini-injection test was conducted which included a fresh water preflush period, injection of 5,000 lb of Pusher 700 at 1,000 ppM followed by 1,000 lb of Pusher 1,000 at 100 ppM, and a fresh water afterflush period. The mini test established that there would be no significant well bore problems associated with the injection of the polymer.
- Research Organization:
- Kewanee Oil Co., Tulsa, OK (USA)
- OSTI ID:
- 5231149
- Report Number(s):
- COO/0029-1
- Country of Publication:
- United States
- Language:
- English
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