El Dorado micellar--polymer project technical letter for April, 1976
The well stimulation program has continued to appear favorable initially; however, the injection rates have tended to decrease slightly. In an attempt to maintain the high level of injectivity obtained after the acid treatment, four wells were acidized with a larger acid volume. The results are currently being reviewed. A total of 25,578 and 24,207 barrels of pretreatment fluids were injected into the Chesney and Hegberg patterns, respectively. Four oil recovery flow tests were conducted to investigate the effectiveness of the latest Shell design in displacing residual oil from El Dorado cores. These tests were made using 0.1, 0.25, 0.5, and 2.0 pore volumes of chemical slug with Kelzan F polymer and the drive water and preflush specified by Shell. It was found that residual oil saturation can be reduced to approximately 5 percent of the pore volume with preflush and continuous injection of chemical slug through 2-in.-diam stacked cores about 10 in. long. Other chemical work has included a study of the solid residue formed in the Shell micellar concentrate, chemical analyses for the wax content of oil, and preparation of cores for wettability tests. Tests designed to determine any wettability changes due to preheating of cores up to 120/sup 0/F were run. The wettabilities of the heated cores were somewhat less negative than those of the unheated cores. Performance prediction work has included a comprehensive study of reservoir sweep and oil recovery versus well rates, additional work on polymer simulation, and a review of Hall and Muskat plots.
- Research Organization:
- Cities Service Oil Co., Tulsa, Okla. (USA)
- Sponsoring Organization:
- US Energy Research and Development Administration (ERDA)
- OSTI ID:
- 7346025
- Report Number(s):
- BERC-0003-9
- Country of Publication:
- United States
- Language:
- English
Similar Records
El Dorado micellar polymer project. Technical letter for July, 1977
Laboratory core floods to support the El Dorado micellar-polymer project
El Dorado micellar-polymer project technical letter for December 1975
Technical Report
·
Fri Dec 31 23:00:00 EST 1976
·
OSTI ID:5447307
Laboratory core floods to support the El Dorado micellar-polymer project
Conference
·
Sun Dec 31 23:00:00 EST 1978
· Soc. Pet. Eng. AIME, Pap.; (United States)
·
OSTI ID:5876269
El Dorado micellar-polymer project technical letter for December 1975
Technical Report
·
Tue Dec 31 23:00:00 EST 1974
·
OSTI ID:7356303