Radiant energy – Geological testing or irradiation – Well testing apparatus and methods
Patent
1984-11-05
1986-08-05
Fields, Carolyn E.
Radiant energy
Geological testing or irradiation
Well testing apparatus and methods
250266, 250269, G01V 508, G01V 510
Patent
active
046045228
ABSTRACT:
The disclosure relates to a method and apparatus for logging a borehole. A sonde having a source of penetrating radiation and at least two longitudinally-spaced radiation detectors is passed within a borehole. Count rate data is produced by each of the detectors and is continuously compared to predetermined count rate relationships which may be obtained from detectors operating in reference standard boreholes. In accordance with this count rate data comparison, the suitability of either the "ratio" or "spine/rib" analytical method is determined and the appropriate technique is automatically applied to produce an indication of a logged parameter such as formation porosity, selectively compensated for a borehole environmental condition such as variations in borehole diameter.
REFERENCES:
patent: 3701902 (1972-10-01), Janssen et al.
patent: 4297575 (1981-10-01), Smith et al.
"Dual Porosity CNL Count Rate Processing", SPE 11146, H. Scott, C. Flaum and H. Sherman (paper presented at the 57th Annual Fall Technical Conference and Exhibition of the Society of Petroleum Engineers of AIME, Sep. 26-29, 1982).
Beard William J.
Fields Carolyn E.
Halliburton Company
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