Radiant energy – Geological testing or irradiation – Well testing apparatus and methods
Patent
1994-02-09
1995-04-25
Dzierzynski, Paul M.
Radiant energy
Geological testing or irradiation
Well testing apparatus and methods
250259, G01V 504
Patent
active
054101522
ABSTRACT:
A method for evaluating the penetration of downhole materials such as proppant, casing annulus fill, or packed gravel by radioactively tagging the material, conducting well logging with gamma ray spectroscopy equipment to generate data signals, and applying an improved low-noise processing routine to the data signals to determine the material's penetration diameter. After hydraulic fracturing, gravel packing, or cementing operations are performed on a cased well, the well is logged using gamma ray spectroscopy techniques. In an exemplary embodiment, the resultant data signals are divided into channels, sent uphole, consolidated into depth intervals, and summed into specified energy windows. The spectra are processed by a weighted least squares technique to represent the spectra as borehole and formation component signals. The relationship between the borehole and formation component signals, which may be expressed as a borehole-formation angle, is then applied to an empirically determined relationship between the borehole-formation angle and mean penetration diameter to provide a penetration diameter signal to assist in evaluating the distribution of the materials pumped downhole.
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Dzierzynski Paul M.
Halliburton Energy Services
Hanig Richard
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