| Title | Fluid Drift Speed and Permeability Asymmetry: Injection Research at East Mesa |
|---|---|
| Authors | Michels, Donald E. |
| Year | 1985 |
| Conference | Geothermal Resources Council Transactions |
| Keywords | Well Tests; Reservoir Models; USA; California; Imperial; Salton Trough; East Mesa; Injection Wells; Injection Tests; Tracers; Liquid Tracers; Production; Logging; UURI; Permeability; Models |
| Abstract | A measurement of the drift speed of native fluids in the East Mesa reservoir has been made; 9.7 to 14 meters per year at well 56-30 and a nominal minimum of 23 meters per year at well 56-19. These results were obtained by injecting tracer laden water into the wells, waiting on the order of 200 days, then back flowing the wells to recover the tracer. The graphical shape of the tracer return curve shows that the reservoir permeability in the vicinity of 56-30 is nonsymmetrical. The drift direction of the native fluid lies at a high angle to the major axis of an ellipse which describes the asymmetrical permeability. |