Patent Number: 6,253,155

Title: Enhanced vertical resolution for logging tools using walsh-transform deconvolution

Abstract: A method of processing logs to enhance vertical resolution is disclosed. In one embodiment the method includes: (a) obtaining a measurement signal from a sensor tool moving through a borehole; (b) determining a Walsh deconvolution filter; and (c) integrating a product of the Walsh deconvolution filter and the measurement signal to obtain an enhanced measurement signal. The Walsh deconvolution filter may be determined by obtaining a set of tool basis functions from the convolution of the tool response function with the set of Walsh basis functions, calculating a tool response correlation matrix, inverting the tool response correlation matrix, and finding the sum ##EQU1## This method may be used for continuous or discrete measurement samples. This method may also be applied to two-dimensional, or time-decay, logs to enhance their spatial resolution.

Inventors: Hagiwara; Teruhiko (Houston, TX)

Assignee: Halliburton Energy Services, Inc.

International Classification: G01V 1/40 (20060101); G01V 1/48 (20060101); G06F 17/15 (20060101); G06F 019/00 ()

Expiration Date: 06/26/2018