Data reduction of images measured in a borehole

Details Data reduction of images measured in a borehole Data reduction of images measured in a borehole

G - Physics

01

D

G01D 3/024 (2006.01) E21B 47/026 (2006.01) E21B 47/12 (2006.01) G01V 5/06 (2006.01)

Patent

CA 2673083

A data reduction method for transmission of a borehole image to the surface of the earth using restricted band widths of LWD telemetry systems. The data reduction method is based on the measurement physics rather than mathematical compression algorithms. Measured data from a sensor are fitted, within the logging tool, to a response function relating sensor response to a parameter of interest. The coefficients of the fitted response function are scaled and then telemetered to the surface. The measured data are reconstructed at the surface by combining the telemetered coefficients with the response function. A borehole image is formed by combining reconstructed reduced data. Parameters of dipping beds intersecting the borehole can be determined from the coefficients.

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