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Keywords: attenuation
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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
... deg in the curved section (X7200ft to X8300ft) and the slant section (X8300ft to TD). Cement bond logs (CBL) show bond index above 70% with minimal micro-annulus effect observed in standard and 1500psi passes. The sonic attenuation effects are clearly visible in the variable density log (VDL) recorded...
Proceedings Papers

Paper presented at the SPWLA 62nd Annual Logging Symposium, May 17–20, 2021
Paper Number: SPWLA-2021-0035
... and guidelines are also discussed before field applications. artificial intelligence array data dielectric constant upstream oil & gas dielectric processing log analysis well logging attenuation inversion invasion spwla-2021-0035 conductivity relative dip phase shift nd annual logging...
Proceedings Papers

Paper presented at the SPWLA 60th Annual Logging Symposium, June 15–19, 2019
Paper Number: SPWLA-2019-W
... records the phase shift and attenuation between two receivers and responds differently to the electrical rock properties (resistivity, permittivity and permeability). The characteristics of the amplitude decay and the phase shift can therefore, under given conditions, be used to extract both...
Proceedings Papers

Paper presented at the SPWLA 59th Annual Logging Symposium, June 2–6, 2018
Paper Number: SPWLA-2018-PPP
... porosity, permeability and acoustic response are also causally related to these scalars (density and atomic number). The purpose of this work is to study the predictive potential of radiographic information quantified by X-Ray attenuation statistical cumulants for some RCAL/SCAL properties. Radiographic...
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
... 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 wellbore casing and cementing information...
Proceedings Papers

Paper presented at the SPWLA 57th Annual Logging Symposium, June 25–29, 2016
Paper Number: SPWLA-2016-EEEE
... was prohibitive due to operational and/or financial 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...
Proceedings Papers

Paper presented at the SPWLA 57th Annual Logging Symposium, June 25–29, 2016
Paper Number: SPWLA-2016-OO
... Abstract A new workflow has been developed for an azimuthal fracture indicator 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...
Proceedings Papers

Paper presented at the SPWLA 57th Annual Logging Symposium, June 25–29, 2016
Paper Number: SPWLA-2016-FF
... Reservoir Characterization well logging frequency cement property cement chemistry strength cylinder mechanical property compressional spwla 57 SH mode shape factor cement formulation casing and cementing attenuation transit time waveform Poisson amplitude compressive strength...
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
... Abstract Recent advances in cement evaluation technology mean that in addition to the established measurements of amplitude and variable density from sonic measurements and acoustic impedance from ultrasonic measurements, three further measurements are available. These are flexural attenuation...
Proceedings Papers

Paper presented at the SPWLA 53rd Annual Logging Symposium, June 16–20, 2012
Paper Number: SPWLA-2012-202
... ABSTRACT: "Anomalous" LWD propagation resistivity log responses were observed in a high angle well. The anomalous character includes anomalous curve separations, periodic variations with depth, and anticorrelation of the phase and attenuation apparent resistivity curves. In particular...
Proceedings Papers

Paper presented at the SPWLA 52nd Annual Logging Symposium, May 14–18, 2011
Paper Number: SPWLA-2011-XX
... ABSTRACT: The evaluation of cement placement and zonal isolation in deep water environments is increasingly challenging. Traditional wireline evaluation methods rely on contrasting attenuation rates of sonic or ultrasonic waves to discriminate between cement and fluid behind pipe. In today's...

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