Geological structures from televiewer logs of GT-2, Fenton Hill, New Mexico [electronic resource] : Part 3, Quality control

Published:: Los Alamos, N.M. : Los Alamos National Laboratory, 1987.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: Pages: 20 : digital, PDF file
Additional Creators:: Los Alamos National Laboratory and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

A procedure has been developed for extracting geological structures from paper prints of intensity-mode televiewer logs. It was applied to old logs of drill hole GT-2 at the Fenton Hill, New Mexico, Hot Dry Rock Site. A series of tests have also been developed for measuring the resultant data quality, and this report describes these tests and applies them to evaluate the procedure. A test for measurement accuracy shows that locations were measured to better than 0.1 ft and orientations to within 1/sup 0/. The root-mean-square error in fitting a trace rarely exceeded 0.2 ft. The second set of tests, for reproducibility, measures the amount of association between two different runs of the same length of hole, in this case a distance of 275 ft. Two new measures of association are defined, termed coplanarity and collinearity. The lack of any recurrences requires explanation and leads to a third set of tests, for repetition rate. The low repetition rate is explained by random errors in location and orientation, which are different on each run. A fourth set of tests consists of fitting a model of the feature-extraction process to the data and estimating data reliability from quality parameters of the model. A perception model yielded an estimate of data quality at 91.5%.

Report Numbers:

E 1.99:la-10619-hdr-pt.3
la-10619-hdr-pt.3

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Note:

Published through SciTech Connect.
12/01/1987.
"la-10619-hdr-pt.3"
"DE88005086"
Burns, K.L.

Funding Information:

W-7405-ENG-36

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