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Keywords: amplitude
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Proceedings Papers

Paper presented at the SPWLA 65th Annual Logging Symposium, May 18–22, 2024
Paper Number: SPWLA-2024-0106
... spanning from unusual poor cement placement issues to completion micro-leaks. Moreover, the quantitative use of noise power amplitudes in selected frequency ranges is relatively new and put ANL in a prime location for the dynamic characterization of very complex scenarios, when the fluid flow path behavior...
Proceedings Papers

Paper presented at the SPWLA 65th Annual Logging Symposium, May 18–22, 2024
Paper Number: SPWLA-2024-0085
... resonance instruments while drilling, three issues need to be addressed: (1) Improve the efficiency of transmitting pulse excitation Improving the efficiency of transmitting pulse excitation includes two aspects: improving the antenna quality factor and increasing the amplitude of transmitting pulse voltage...
Proceedings Papers

Paper presented at the SPWLA 65th Annual Logging Symposium, May 18–22, 2024
Paper Number: SPWLA-2024-0098
... signal into binary output. This enables us to apply sophisticated signal processing techniques. The first level of output includes the amplitude of the received signal and the travel time across the section of the core. Through joint inversion, we convert the amplitude and travel time into resistivity...
Proceedings Papers

Paper presented at the SPWLA 65th Annual Logging Symposium, May 18–22, 2024
Paper Number: SPWLA-2024-0026
... integrity and optimizing production efficiency in the Pre-salt reservoirs. Sonic logging is widely used to assess cement quality by measuring the amplitude of first casing reflection INTRODUCTION and analyzing its attenuation associated with the acoustic coupling between casing and cement, however, due...
Proceedings Papers

Paper presented at the SPWLA 65th Annual Logging Symposium, May 18–22, 2024
Paper Number: SPWLA-2024-0094
... the contributions of the additional PR measurement permutations, to illustrate their results by modeling and measurements, and to assess the added value for field applications. The Rx spacing is directly related to the vertical resolution (VR) and signal amplitude of the PR measurement. While the short Rx spacing...
Proceedings Papers

Paper presented at the SPWLA 65th Annual Logging Symposium, May 18–22, 2024
Paper Number: SPWLA-2024-0113
... spwla 65 amplitude operation acquisition thickness compensation imaging casing and cementing aperture spwla-2024-0113 algorithm axis azimuth SPWLA 65th Annual Logging Symposium, May 18-22, 2024 DOI: 10.30632/SPWLA-2024-0113 CEMENT BOND AND CORROSION LOGGING WITH ULTRASONIC PHASED-ARRAY...
Proceedings Papers

Paper presented at the SPWLA 65th Annual Logging Symposium, May 18–22, 2024
Paper Number: SPWLA-2024-0090
... machine learning sedimentary rock rock type log analysis saturation nmr confusion gmm algorithm amplitude petroleum spwla-2024-0090 th annual logging symposium spwla 65 university k-means algorithm china university calculation SPWLA 65th Annual Logging Symposium, May 18-22, 2024 DOI...
Proceedings Papers

Paper presented at the SPWLA 65th Annual Logging Symposium, May 18–22, 2024
Paper Number: SPWLA-2024-0017
... showed both time and strain amplitude scaling. The axial and radial strain data both show scaling behavior under both low and high levels of deviatoric stress. The salt showed only axial creep response at low deviatoric stress distally from the yield surface (no radial response). In contrast, the salts...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0059
...-specific challenge, which is the contamination of the casing mode by the drill collar mode. Specifically, tool waves traveling along LWD tools appear in the first echo of casing arrivals, and their amplitudes can be much larger than casing wave arrivals. Consequently, the estimates of casing wave...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0060
... mode and the LWD formation quadrupole mode are examples of borehole-guided modes. As shear head waves are notorious for their low amplitudes (especially in slow formations), this paper will be concerned with the development of two inversion methods that allow us to obtain formation shear slowness from...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0005
... government amplitude geological subdiscipline regime mechanism measuring time scaling creep salt deformation journal spwla 64 international journal greenhouse ga emission university high-stress regime SPWLA 64th Annual Logging Symposium, June 10-14, 2023 DOI: 10.30632/SPWLA-2023-0005...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0065
... government production monitoring reservoir surveillance frequency production logging uae government annual logging symposium sensing panhuis cut-off frequency noise doi amplitude van der horst spwla-2023-0065 geometry correlation fiber das restriction spe annual technical conference...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0109
... with interpreter-defined polygons, and unsupervised machine learning algorithms, such as principal component analysis and cluster analysis. A significant shortcoming for all of these methods is that the calculated volumes for each fluid are simply the cumulative sum of the amplitudes that are contained within...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0110
... of 2D NMR measurements. We developed a workflow that approximates 2D NMR maps with a superposition of 2D gaussian distributions. The algorithm automatically determines the optimum number of gaussian distributions and their corresponding properties (i.e., amplitudes, variances, and means). Next...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0108
... the transmitter (or receiver), cement bond being estimated by measuring the amplitude of the received waveform at the expected casing signal arrival time compared to a known unbonded interval of casing. The recorded wavefield can contain both casing and formation signals. However, the formation signals...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0036
... as the only rock-saturating fluid. With the conditions (a) and (b) met, it has been observed with laboratory and field data that the replacement of formation water with hydrocarbon can result in a significant loss of voltage amplitude, known as hydrocarbon SP suppression. Classical publications on the subject...
Proceedings Papers

Paper presented at the SPWLA 62nd Annual Logging Symposium, May 17–20, 2021
Paper Number: SPWLA-2021-0060
... complexities in field application conditions; the lack of online from May 17-20, 2021. cement bond, non-uniform bonding, unconformity or roughness at the bonding interface, etc., all have an ABSTRACT impact on the acoustic-wave amplitude. Modeling the effects of the varying bonding conditions has long been...
Proceedings Papers

Paper presented at the SPWLA 62nd Annual Logging Symposium, May 17–20, 2021
Paper Number: SPWLA-2021-0058
... reservoir characterization hydraulic fracturing reservoir geomechanics structural geology well logging berea sandstone log analysis ultrasonic reflection coefficient gypsum plaster coefficient reflection coefficient variability receiver amplitude university incidence angle spwla...

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