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

Technical Report · Tue Dec 01 04:00:00 EST 1987

DOI:https://doi.org/10.2172/5720112· OSTI ID:5720112

Burns, K L

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%.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5720112
• Report Number(s): LA-10619-HDR-Pt.3; ON: DE88005086
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
58 GEOSCIENCES
ACCURACY
BOREHOLES
CAVITIES
CONTROL
DATA PROCESSING
ENERGY SYSTEMS
FEDERAL REGION VI
GEOLOGIC STRUCTURES
GEOTHERMAL SYSTEMS
Geothermal Legacy
HOT-DRY-ROCK SYSTEMS
JEMEZ MOUNTAINS
MOUNTAINS
NEW MEXICO
NORTH AMERICA
PROCESSING
QUALITY CONTROL
USA
WELL LOGGING