Indicating barehole rugosity as a function of the difference bet

Details Indicating barehole rugosity as a function of the difference bet Indicating barehole rugosity as a function of the difference bet

1984-06-27

1987-10-13

Smith, Jerry

Boots, shoes, and leggings

250256, 364571, 364575, 367 43, 367 45, G01V 128, G01V 136, G06F 1520

Patent

active

047003006

ABSTRACT:
Statistical variations in simultaneous shallow and deep investigation nuclear borehole logs are reduced using digital moving average data processing while maintaining responsiveness to formation changes, by transitioning through a combination of long and short filtered data as a function of the statistical variation of the deep log data differences of the long and short derived averages. Borehole rugosity is also indicated as a function of the difference between the shallow and the deep log indexes of the differences between their respective narrow and wide derived averages.

REFERENCES:
patent: 3256480 (1966-06-01), Runge
patent: 4458340 (1984-07-01), Lautzenhiser
"Applications of Digital Filtering Techniques to Nuclear Well Logs"; W. E. Schultz and S. G. Thadani; SPWLA, 22nd Annual Logging Symposium, Jun. 23-26, 1981.

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