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Keywords: frequency
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Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0060
...) and/or tool eccentricity effects, it is not always possible to obtain formation shear slowness directly via conventional Slowness-Time- Coherence (STC) methods. Consequently, a dispersion correction is needed to quality control and/or correct the STC result. We propose a hybrid Slowness-Frequency-Coherence...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0050
..., since both measurements are different due to their frequency ranges and experimental procedures, the Petrophysicist finds it can be challenging to correlate the two pieces of information. In this paper, we analyze NMR data from core analysis and wireline logs, calibrate appropriate T1-T2 cutoff values...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0070
... for modelling. It enables simultaneous multispacing and multi-frequency computing at the cost of a single frequency and single transmitter-receiver spacings. The method gave rise to a family of fast and efficient modelling techniques and software. It made possible the detailed investigation of modern...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0082
... operator software implementation drilling data acquisition spwla-2023-0082 doi exhibition information artificial intelligence inversion reservoir application frequency SPWLA 64th Annual Logging Symposium, June 10-14, 2023 DOI: 10.30632/SPWLA-2023-0082 HIGH-PERFORMANCE STOCHASTIC INVERSION...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0011
... on the performance of those models in water saturation assessment remains to be tested. Frequency-domain dielectric permittivity simulations can model the influence of pore and grain geometries on dielectric permittivity without a need for explicitly defining those parameters. Individual impacts...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0062
... requirements to maintain stable vibration modals, allowing the power losses corresponding to the energy being coupled across the casing-LWC bond interface and dissipating into the formation to be measured. The research shows that the system resonance frequencies and their corresponding mode shapes are affected...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0048
... formation, measurement noise, frequency of operation, and distance between transmitter and receivers. INTRODUCTION Sandstone injectites are intrusions formed during the remobilization of injected sandstone, which form a complex network and can be found hundreds of meters above the main sandstone reservoir...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0065
.... By looking at specific frequency bands, different phenomena can be detected and distinguished. As discussed by McKinley et al (1973), Koerner et al (1979), and McKinley and Bower (1979), flow phenomena can be classified according to the following criteria: 2 SPWLA-2023-0065 SPWLA 64th Annual Logging...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0122
... ABSTRACT A new class of near-bit resistivity tool has been developed. The new tool measures both attenuation and phase-difference resistivities at 800 kHz and 4 MHz frequencies, resulting in a total of four independent measurements for each of the 16 sectors. Quadrant resistivity data...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0111
... critical information about the reservoirs for quantifying their petrophysical parameters and fluid properties and estimating productivity. Laboratory higher frequency (HF), e.g., 23MHz NMR techniques, especially two-dimensional (2D) T1-T2 mapping, and their applications have been essential...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0114
... and temperature conditions of simulations were 50 PPT and 75°C, respectively. The numerical simulator solved Maxwell s equations that describe the propagation of electromagnetic waves using a finite volume algorithm in the frequency domain. The outcomes of numerical simulations included real and imaginary parts...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0108
... the petrophysics industry. Previously, we investigated the validity of comparing T2 distributions and T1-T2 maps for various samples recorded at 2, 12 and 23 MHz. In this paper, we continue this work by the fields investigated to even higher frequencies. This paper includes T2 measurements of bulk fluid (doped H2O...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0118
..., AIL tools use the combination of multiple operation frequencies and multiple subarrays, provide much richer resistivity information. Taking the high-definition induction logging tool (HDIL) from Baker Atlas Inc. as example, it s seven subarrays, names as SUB1 to SUB 7, are all located at the same side...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0004
... at high frequencies decouples and distinguishes water salinity and water saturation. However, wireline pad dielectric tools and late survey times may fall short of a comprehensive saturation analysis of virgin hydrocarbons. Modeling studies show that despite the low operating frequency of Logging-While...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0002
...-frequency dielectric data has the potential to be implemented in interpreting downhole dielectric logs for continuous Archie parameters m and n, resolving a longstanding challenge in formation evaluation. Archie equation is the foundation of modern petrophysics and parameters m, cementation exponent, and n...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0041
... not in direct contact with the casing, the measured resistivity will be distorted and often cannot be used. While an AC with high frequency is emitted by an electrode inside conductive casing, the current will pass through the casing and flow along the outer surface of the casing. The current phase shift along...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0022
... Abstract Oilfield exploration and production drilling companies commonly use Logging-While-Drilling (LWD) measurements provided by propagation-resistivity tools. These tools emit radio waves at frequencies from 400 kHz to 2 MHz and measure signal attenuation and phase shift between receiver...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0033
... into monopole, dipole, and quadrupole components. Processing results of the sourceless tool using time and frequency semblance are compared to those from a traditional LWD acoustic tool in the same well to demonstrate the viability of the concept. We also demonstrate that in the case of "traditional" LWD...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0012
... profile spwla-2022-0012 spwla 63 frequency receiver algorithm reference model reservoir characterization deviation medium property doi conventional sensor das data rd annual logging symposium upstream oil & gas variation inversion acquisition SPWLA 63rd Annual Logging Symposium...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0043
.... It is also possible to reconstruct these formation layers from the measurements made by a shallower resistivity measurement tool operating at higher frequencies with a shorter transmitter-receiver spacing. Numerical examples will be presented to demonstrate the effectiveness of the proposed ranging...

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