G - Physics – 01 – V
Patent
G - Physics
01
V
G01V 3/38 (2006.01) G01V 3/18 (2006.01) G01V 3/30 (2006.01)
Patent
CA 2465475
Method and apparatus are provided for adjusting electromagnetic well logging data for effects of frequency dispersion. In exemplary embodiments, a model is provided for estimating an electrical property of an earth formation as a function of frequency. The model is derived, for each particular volume of interest, based on measured data obtained by employing a plurality of interrogation frequencies. Measured data may include electrical properties of the volume of interest such as conductivity and dielectric constant. The model predicts the measurements expected to be obtained by a tool employing a selected interrogation frequency, including frequencies for which no measured data are available. In one embodiment, the model may be used to adjust measured data for effects of frequency dispersion to correspond to a selected interrogation frequency, allowing the adjusted data to be more effectively correlated to logging data obtained by a different type of tool employing a different interrogation frequency.
Borden Ladner Gervais Llp
Pathfinder Energy Services Inc.
Smith International Inc.
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