Field Demonstration of the Conventional Steam-Drive Process with Ancillary Materials. First Annual Report, October 1979-October 1980

摘要

The primary goal of the field demonstration is to evaluate the economic merits of ancillary materials to a conventional steam drive to improve sweep efficiencies. The ancillary materials are used to reduce injection in steam channels and thus force the injected steam to enter alternate flow paths. By the end of the first year of the contract, background data have been collected, observation wells have been drilled, four injection well treatments have been designed and started, and comprehensive monitoring of data is underway. The project is slightly ahead of schedule as established in the Milestone Charts. Chemical treatments began in January 1980, and by May 1980, all four treatments were underway. Evaluation of production data plotted by injection pattern shows increases in production that can be attributed to the ancillary materials. Estimates of as much as 125 barrels of incremental oil per day can be made during August 1980, depending upon the method of establishing decline curves. A more precise figure for incremental production will be obtainable after additional time has passed and a more precise decline curve can be established. Since the completion of the observation wells, in late January 1980, two runs of Carbon-Oxygen Logs have been obtained by Dresser Atlas. The computer interpretation (Epilog) indicates a reduction in residual oil saturations in some intervals but a trend cannot be established at this time, there being only two data points. In addition to the noticeable increase in production and the apparent reduction in residual oil saturations, substantial reductions in casing vent gas emissions have also been recorded. (ERA citation 06:019762)