Robust Well Log Sharpening With Unknown Tool Response Function

摘要

A method for enhancing axial resolution of a well logging instrument includes classifying a formation into a plurality of single well log measurement value zones to generate a squared well log. A response function of a well logging instrument is decomposed into a plurality of wavelets. The wavelets are convolved with the squared well log to generate a simulated tool response. The simulated tool response is compared to a measured tool response in the formation. The decomposing is repeated with different coefficients for each wavelet and the convolving is repeated until a mismatch between the simulated tool response and the measured tool response falls below a measurement uncertainty of the well logging instrument.

主权项

1. A method for enhancing axial resolution of a well logging instrument, comprising:
in a computer, classifying a formation into a plurality of single well log measurement value zones to generate a squared well log; in the computer, decomposing a response function of a well logging instrument into a plurality of wavelets; in the computer, convolving the wavelets with the squared well log to generate a simulated tool response; in the computer, comparing the simulated tool response to a measured tool response in the formation; and repeating the decomposing with different coefficients for each wavelet and repeating the convolving until a mismatch between the simulated tool response and the measured tool response falls below a measurement uncertainty of the well logging instrument.