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Keywords: attenuation
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Proceedings Papers

Paper presented at the SPWLA 65th Annual Logging Symposium, May 18–22, 2024
Paper Number: SPWLA-2024-0024
... the noise model in the final real-world scenario tests. spwla-2024-0024 geology neural network log analysis well logging drilling data acquisition geologist artificial intelligence drilling measurement machine learning frequency algorithm attenuation prediction resistivity inversion...
Proceedings Papers

Paper presented at the SPWLA 65th Annual Logging Symposium, May 18–22, 2024
Paper Number: SPWLA-2024-0073
... electromagnetic response attenuation detection spwla 65 frequency expression SPWLA 65th Annual Logging Symposium, May 18-22, 2024 DOI: 10.30632/SPWLA-2024-0073 ENERGY AND SPECTRUM OF TRANSIENT ELECTROMAGNETIC RESPONSES FOR DEEP-READING LOOKING-AHEAD LWD TOOLS Pengfei Liang, Qingyun Di, Wenxuan Chen...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0059
... amplitudes are biased due to the involvement of tool wave amplitudes if using conventional CBL processing. Additionally, estimates of casing wave attenuation suffer from the existence of tool wave arrivals because the relation between attenuation and cement bond indices is no longer monotonic. This non...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0119
... attenuation ABSTRACT This paper describes a case history using an improved cement bond evaluation workflow integrating traditional cement evaluation logs and downhole permanent temperature data in a tight oil play in southern Oklahoma. A pair of producer and monitor wells were drilled and completed...
Proceedings Papers

Paper presented at the SPWLA 62nd Annual Logging Symposium, May 17–20, 2021
Paper Number: SPWLA-2021-0035
... physical metallic particles can cause a huge dielectric effect approach to calculate dielectric constant and resistivity (Wong, 1979; Misra, 2015). Efforts have been taken to directly from phase shift and attenuation logs without explore potential applications of dielectric constant in resorting...
Proceedings Papers

Paper presented at the SPWLA 60th Annual Logging Symposium, June 15–19, 2019
Paper Number: SPWLA-2019-W
... and receiver antenna operates as a magnetic dipole with polarization along the borehole longitudinal axis. The instrument provides borehole-compensated propagation wave attenuation and phase difference measurements at five discrete frequencies at multiple depths of investigation (up to 8 inch). The instrument...
Proceedings Papers

Paper presented at the SPWLA 59th Annual Logging Symposium, June 2–6, 2018
Paper Number: SPWLA-2018-PPP
... is to study the predictive potential of radiographic information quantified by X-Ray attenuation statistical cumulants for some RCAL/SCAL properties. Radiographic screening can be performed in seconds per sample providing a cost/time efficient method to obtain sample data. 15 samples were chosen from a well...
Proceedings Papers

Paper presented at the SPWLA 58th Annual Logging Symposium, June 17–21, 2017
Paper Number: SPWLA-2017-WWWW
... that make it possible to log in the heaviest and most attenuative mud environments and through thick-walled casings. We have developed a calibration-free ultrasound pulse-echo processing method that capitalizes on self-compensation for mud properties and eliminates the need for separate mud property...
Proceedings Papers

Paper presented at the SPWLA 58th Annual Logging Symposium, June 17–21, 2017
Paper Number: SPWLA-2017-HHH
... log analysis gas storage Subsurface Corrosion flowline corrosion materials and corrosion riser corrosion well logging well integrity Pipeline Corrosion natural gas storage perforated interval natural gas storage well cement evaluation attenuation operation integrity information...
Proceedings Papers

Paper presented at the SPWLA 57th Annual Logging Symposium, June 25–29, 2016
Paper Number: SPWLA-2016-EEEE
... considerations, lithology and mineralogy information may not be available. In the cased-hole environment, the casing and concrete cause attenuation and contribution effects on the spectral gamma rays, which increase the uncertainty in measurements, making cased-hole spectroscopy analysis extremely challenging...
Proceedings Papers

Paper presented at the SPWLA 57th Annual Logging Symposium, June 25–29, 2016
Paper Number: SPWLA-2016-OO
... that estimates fracture presence by using measurements of attenuation of dipole acoustic waveforms as a complement to the established Stoneley fracture analysis. The new approach computes normalized differential energies (NDE's) for the oriented dipole for subsequent integration with the traditional Stoneley...
Proceedings Papers

Paper presented at the SPWLA 57th Annual Logging Symposium, June 25–29, 2016
Paper Number: SPWLA-2016-FF
..., cement properties and their changes can differ greatly from the standard simulated lab sample measurements. In severe cases, the cement may not set and develop the required strength, resulting in no structural support or zonal isolation. Typical methods for evaluating cement use attenuation...
Proceedings Papers

Paper presented at the SPWLA 57th Annual Logging Symposium, June 25–29, 2016
Paper Number: SPWLA-2016-MMM
... applications where pressures can reach up to 35,000 psi. Ultrasonic technology has been used for many years for well integrity assurance, but it has been limited to 14- to 16-ppg borehole fluid and 0.2- to 0.75-in. casing thicknesses. The challenge was to overcome highly attenuative borehole fluid as well...
Proceedings Papers

Paper presented at the SPWLA 56th Annual Logging Symposium, July 18–22, 2015
Paper Number: SPWLA-2015-TT
... in the determination of key minerals by the measurement of elements in the capture and inelastic spectrum. The challenges of applying this technology in a cased-hole environment included defining relevant corrections for casing and cement gamma ray attenuation effects and their respective contribution effects...
Proceedings Papers

Paper presented at the SPWLA 56th Annual Logging Symposium, July 18–22, 2015
Paper Number: SPWLA-2015-VVVV
... sectored compensated attenuation measurements for the varying wave types. n this paper, we will first look at the theoretical background, physics, and modeling of these new EMATs as well as the various guided wave modes they can generate. We will then review the additional lab measurements and test well...
Proceedings Papers

Paper presented at the SPWLA 56th Annual Logging Symposium, July 18–22, 2015
Paper Number: SPWLA-2015-QQQQ
... "stitched" one-dimensional (1D) sections rather than by a single 1D reduced model. This provides added flexibility in order to approximate complex 3D formations. Second, we introduce the concept of "negative apparent resistivities" in the inversion method. By using the values of attenuation and phase...
Proceedings Papers

Paper presented at the SPWLA 56th Annual Logging Symposium, July 18–22, 2015
Paper Number: SPWLA-2015-JJ
... well logging attenuation lose sensitivity spwla 56 apparent permittivity permittivity conductivity resistivity transmitter XXcomponent dielectric permittivity frequency range Symposium anisotropy phase difference sensitivity dielectric anisotropy dielectric tool SPWLA 56 th Annual...
Proceedings Papers

Paper presented at the SPWLA 55th Annual Logging Symposium, May 18–22, 2014
Paper Number: SPWLA-2014-Q
... and a wall thickness of 0.7 in or thicker. To address the task, a pad-based segmented CBL tool can be configured to provide the cement evaluation in these conditions, providing a unique ability to produce a 60-degree attenuation map in casing as large as 24 in OD. To manage the large casing requirements...
Proceedings Papers

Paper presented at the SPWLA 54th Annual Logging Symposium, June 22–26, 2013
Paper Number: SPWLA-2013-SSS
... impedance from ultrasonic measurements, three further measurements are available. These are flexural attenuation, amplitude and velocity from the third interface echo. The availability of six independent measurements can increase one s confidence in the evaluation interpretation. In addition...

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