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Keywords: flux
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Proceedings Papers

Publisher: Society of Petrophysicists and Well-Log Analysts
Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0061
..., this technology provides the capability to evaluate the tubing eccentricity inside the casing. Through-tubing casing inspection presents challenges in mainly two areas, the first is the tubing shielding effect. On average, only 20% of the magnetic flux density reaches the casing area behind the tubing. Secondly...
Proceedings Papers

Paper presented at the SPWLA 58th Annual Logging Symposium, June 17–21, 2017
Paper Number: SPWLA-2017-EEEE
... the presence of tool or borehole. We assume a sphere with the source at its center. The formation is of SiO2 with matrix density of 2.65 g/cc. We vary the liquid-filled porosity and compute the neutron flux at radially outward cells. Figure 3 displays the near/far (N/F) ratio of the total flux. 0 100 200 300...
Proceedings Papers

Paper presented at the SPWLA 55th Annual Logging Symposium, May 18–22, 2014
Paper Number: SPWLA-2014-JJ
... well logging variation flux cs-137 source Upstream Oil & Gas sensitivity density sensitivity correction detector spwla 55 Badruzzaman interpretation log analysis cell 9 Bremsstrahlung source Symposium photon flux hydrogen spectra neutron source inelastic photon photon...
Proceedings Papers

Paper presented at the SPWLA 48th Annual Logging Symposium, June 3–6, 2007
Paper Number: SPWLA-2007-O
... Upstream Oil & Gas spwla 48 variation flux log analysis Monte Carlo simulation calculation porosity detector Simulation neutron fsf nuclear measurement well logging Symposium equation density measurement FSF approximation radial direction rapid simulation particle flux...
Proceedings Papers

Paper presented at the SPWLA 44th Annual Logging Symposium, June 22–25, 2003
Paper Number: SPWLA-2003-Q
... code, and utilised the predicted fluxes at the detector locations to train a set of neural networks. The deterministic code is based on the multi-group energy approximation, and solves the Boltzman transport equation for neutral particles using a variational discretisation procedure based on the even...
Proceedings Papers

Paper presented at the SPWLA 34th Annual Logging Symposium, June 13–16, 1993
Paper Number: SPWLA-1993-Y
... atomic ion yields, higher avenge current capabilities and longer life. It is expected that 4.3 cm-diameter logging tools incorporating HINS systems (including source, power supplies and controls) will be capable of generating average neutron output fluxes of >109/sec at -14 MeV or >?107/sec at -2.5...
Proceedings Papers

Paper presented at the SPWLA 28th Annual Logging Symposium, June 29–July 2, 1987
Paper Number: SPWLA-1987-INV-NU
... the contribution of trace absorbers. Upstream Oil & Gas calculation absorption cross-section experiment well logging Transputer correlation borehole Artificial Intelligence accuracy carlo calculation mdel log analysis flux correction cross-section important advantage detector...
Proceedings Papers

Paper presented at the SPWLA 27th Annual Logging Symposium, June 9–13, 1986
Paper Number: SPWLA-1986-LLL
... by a factor of 3 from the value for clean sand. Improvements in the technique are now being studied which will increase the accuracy to about 1% or 2%. log analysis mrth high degree Reservoir Characterization Upstream Oil & Gas reactor sanple flux structural geology accuracy establishment...
Proceedings Papers

Paper presented at the SPWLA 25th Annual Logging Symposium, June 10–13, 1984
Paper Number: SPWLA-1984-QQQ
... well logging particle porosity Porosity Tool computer detector borehole Monte Carlo flux log analysis approximation neutron Computation energy group Upstream Oil & Gas sensitivity statistical error geometry Symposium log interpretation spectra detector response...
Proceedings Papers

Paper presented at the SPWLA 24th Annual Logging Symposium, June 27–30, 1983
Paper Number: SPWLA-1983-ZZ
... well logging phenomenological model Upstream Oil & Gas mud cake fitting detector assembly log analysis detector flux physics interaction aluminum block photon spectrum geometry detector assembly detector assembly Austin Chalk photoelectric cross section Symposium spectra...
Proceedings Papers

Paper presented at the SPWLA 21st Annual Logging Symposium, July 8–11, 1980
Paper Number: SPWLA-1980-W
.... well logging schlumberger-doll research neutron absorber Symposium detector calibration flux Wellsite Measurement capture cross-section absorber Upstream Oil & Gas engineering physics department Schlumberger Well Service interpretation resistivity log analysis thermal neutron...
Proceedings Papers

Paper presented at the SPWLA 11th Annual Logging Symposium, May 3–6, 1970
Paper Number: SPWLA-1970-B
... to calculate the uncollided steady-state 4.43 and 6.09 MeV gamma flux received by a detector immersed in an infinite reservoir together with a 14 MeV neutron source. These data have been combined with moments methods data and the magnitude of the interference problem determined. Analysis of data presented...

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