El Dorado micellar-polymer project technical letter for December 1975
The primary field activity for December has been operation of the Injection Plant during the period of extreme freezing weather. Another prime concern has been the severe loss of injectivity experienced in the first two weeks of operation. A total of 12,170 barrels and 15,720 barrels has been injected in the Chesney and Hegberg patterns, respectively. This is a composite average of 50 barrels per day per well which is about one-half to one-third the desired injection rate. Chemical selection and support work has included the following areas: mobility flow tests, surfactant and polymer testing, injectivity and chemical sensitivity flow tests, oil displacement tests, and support work relating to the field laboratory and the low injectivity problems. Steady-state relative permeability data have been measured on two native-state core samples. A paper entitled ''Core Analysis Study for the El Dorado Micellar-Polymer Project'' was prepared for a Society of Petroleum Engineers meeting this spring. A final summary of directional permeability is being prepared. The summary is to be the basis for a second paper at the Society of Petroleum Engineers meeting in March, 1976. Bottom-hole pressures were measured in each monitoring well in December to help evaluate possible causes for the low injectivity. Computer simulations have been used to match the project injection and production rates. Very good agreement between observed and calculated rates was obtained for Kh values of 878 md-ft for the Chesney lease and 493 md-ft for the Hegberg lease.
- Research Organization:
- Cities Service Oil Co., New York (USA)
- Sponsoring Organization:
- US Energy Research and Development Administration (ERDA)
- OSTI ID:
- 7356303
- Report Number(s):
- BERC-0003-5
- Country of Publication:
- United States
- Language:
- English
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