Method for eliminating the effect of rugosity from compensated f

Details Method for eliminating the effect of rugosity from compensated f Method for eliminating the effect of rugosity from compensated f

1989-10-05

1991-05-28

Hannaher, Constantine

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250265, 250266, 250269, G01V 504, G01V 512

Patent

active

050197088

ABSTRACT:
A method for determining the compensated density of a subsurface geological formation wherein the effect of borehole rugosity is reduced or eliminated utilizes the differences in the vertical response functions of the detectors at different distances into the formation. The method eliminates the contribution of the "shallow" formation region, irrespective of whether its properties are varying slowly or rapidly, without degrading the resulting vertical resolution. Furthermore, the method for determining such a characteristic of a subsurface geological formation does not require any additional or new measurements to be made, thus logging data from older wells can easily be reevaluated.

REFERENCES:
patent: 4394674 (1983-07-01), Grau et al.
patent: 4423323 (1983-12-01), Ellis et al.
patent: 4604522 (1986-08-01), Arnold
patent: 4786796 (1988-11-01), Flaum et al.
patent: 4794792 (1989-01-01), Flaum et al.
patent: 4814611 (1989-03-01), Moake
patent: 4909075 (1990-03-01), Flaum et al.

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