Quick Look Inversion of Through-Casing Resistivity Measurement. Final Report,June 1994-May 1995

摘要

Through-Casing Resistivity (TCR) measurement of the formation resistivity isbased on evaluation of an extremely low level current leaking into the formation from an energized casing. To reduce the effects of distortions on the estimate of pay zone resistivity, this research developed a Quick Look Inversion algorithm. The analysis shows that traditional 1-D inversion approaches are not applicable to TCR logging. The Quick Look Inversion algorithm is based on a fundamental model describing the physical nature of the distortions. Numerical experiments show the algorithm can efficiently and accurately invert noisy simulated data.