Global classification of sonic logs
First Claim
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1. A method of determining the sonic slowness of a formation traversed by a borehole comprising:
- receiving sonic waveform data for a plurality of depth intervals;
generating tracks as individual objects at least for a selected depth interval from the sonic waveform data received;
classifying the generated tracks within the selected depth interval, wherein the classification is based on the tracks comprising a predetermined number of peaks and all the tracks are generated for the selected depth interval before classification; and
determining the sonic slowness of a formation and outputting the determined results.
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Abstract
A method of determining the sonic slowness of a formation traversed by a borehole comprising generating tracks from sonic waveform peaks received at a plurality of depths wherein the peaks that are not classified prior to tracking is set forth. A method for generating a slowness versus depth log is generated for waveform arrivals by classifying long tracks, classifying small tracks; classifying tracks that overlap; filling in gaps; and creating a final log is disclosed. In further improvements, non-classified tracks and interpolation are used to fill in gaps.
11 Citations
44 Claims
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1. A method of determining the sonic slowness of a formation traversed by a borehole comprising:
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receiving sonic waveform data for a plurality of depth intervals; generating tracks as individual objects at least for a selected depth interval from the sonic waveform data received; classifying the generated tracks within the selected depth interval, wherein the classification is based on the tracks comprising a predetermined number of peaks and all the tracks are generated for the selected depth interval before classification; and determining the sonic slowness of a formation and outputting the determined results. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A computer system for performing a method of determining the sonic slowness of a formation traversed by a borehole comprising:
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receiving sonic waveform data for a plurality of depth intervals; generating tracks as individual objects at least for a selected depth intervals from the sonic waveform data received; classifying the generated tracks within the selected depth interval, wherein the classification is based on the tracks comprising a predetermined number of peaks and all the tracks are generated for the selected depth interval before classification; and determining the sonic slowness of a formation and outputting the determined results, wherein the method is implemented in a program stored on a storage media and the output of the determined sonic slowness is applied to at least one output device.
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24. A method of determining the sonic slowness of a formation traversed by a borehole comprising:
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generating tracks from sonic waveform peaks received at a plurality of depths, wherein the step of generating tracks comprises; a) classifying long tracks; b) classifying small tracks; c) classifying tracks that overlap; d) filling in gaps; and e) creating a final log. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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Specification