1. Microbial Stimulation Treatment of High Water-Cut Wells in the Viola Formation, Pontotoc County, OK D.R. Simpson, R. M. Knapp, N. Youssef, K.E. Duncan, M.J. McInerney, C. Brackin

4. Preparation for inoculation and nutrient amendment of 50 bbl starter culture

5. Filling and mixing of 50 bbl starter culture

6. Nutrient amendment for 2 x 500 bbl injections

7. Unloading of nutrient amendment

8. Pre-injection filling with pump truck and mixing with gasoline pump

9. Injection with gasoline pump

10. Oil spread assay to detect biosurfactant activity

11. WOR and % oil cut before and after stimulation

12. Figure 1: The total net increase in oil production from the Robertson separation tank battery

13. Figure 2: The daily oil recovery from the Robertson separation tank battery

14. Figure 3: Comparison of the daily oil recovery with the i n-situ combined daily microbial metabolite recoveries for the Robertson separation tank battery

15. Figure 4: The time-course of WOR for Robertson 15 and 13 wellhead samples

16. Figure 5: The time-course of percent oil cut for Robertson 15 and 13 wellhead samples

17. Figure 6: The average daily production volumes for Robertson 15 and 13 wellhead samples