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The AAPG/Datapages Combined Publications Database

Showing 18,799 Results. Searched 200,357 documents.

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Abstract: Variable-factor S-transform for Time-frequency Decomposition, Deconvolution, and Noise Attenuation; #90172 (2014)

Todor I. Todorov, Gary F. Margrave

Search and Discovery.com

...(t) is the analysis window, usually Gaussian, and G(τ,f) is the complex Gabor spectrum. A fundamental property of the time-frequency decomposition...

2014

Abstract: Exploring Potential Applications of Gaussian Ball Filters in Sharpes Hollow Cavity Model; #90224 (2015)

Christopher C. Petten and Gary F. Margrave

Search and Discovery.com

... a spectrum that has three main features. These features include: (1) a low-frequency roll-off in the frequency spectra, (2) the overall amplitude response...

2015

Low-frequency data reconstruction for full-waveform inversion

Ramzi Djebbi, Maiza Bekara, Jaime Ramos-Martinez, Nizar Chemingui

International Meeting for Applied Geoscience and Energy (IMAGE)

...Low-frequency data reconstruction for full-waveform inversion Ramzi Djebbi, Maiza Bekara, Jaime Ramos-Martinez, Nizar Chemingui Low frequency data...

2022

Understanding the causes of low frequency shadow below gas hydrates

Ayman Noor M. Qadrouh, Saad Alajmi

Petroleum Exploration Society of Australia (PESA)

... of the centroid frequency of the power spectrum is estimated as a function of the travelled distance. Then, 1D experiments perform to quantify the frequency loss...

2019

Abstract: Enhanced Analysis of 3-D Seismic Survey over a Carbonate Province

M. R. Thapar, B. R. Ayme

Geological Society of Malaysia (GSM)

... features, to strong reflections from carbonate rocks having a much higher velocity than the surrounding rocks. Amplitude, frequency, and velocity of seismic...

1980

Transformation of Arithmetic and Phi Size-Distribution Moments: NOTES

Basanta K. Sahu

Journal of Sedimentary Research (SEPM)

... arithmetic to phi-moments and vice versa are developed which can be applied to weight as well as number frequency size distributions and for any method...

1965

The Use and Misuse of the Nonlinear Vibroseis Method for the Acquisition of High Resolution Seismic Data: ABSTRACT

Kenneth L. Hargrove

AAPG Bulletin

... of frequency change during the sweep. Nonlinear Vibroseis® sweeps are now becoming popular for the acquisition of high resolution seismic data in End_Page...

1983

Seismic Attenuation Analysis for Reservoir Description

Search and Discovery.com

... and maybe reliable way is to use spectral decomposition, i.e. to do time-frequency analysis on each trace, and from instantaneous amplitude spectrum...

2013

Abstract: Spectral Decomposition Applications; #90211 (2015)

Satinder Chopra, John Castagna, and Vladimir Alexeev

Search and Discovery.com

... us ed frequently in seism ic data processing by wa y of s pectral analysis, frequency filtering, wavelet characterization, etc., but in recent years...

2015

Abstract: Application of Dominant Frequency Band Reconstruction Inversion Technology in the Prediction of Oil-Bearing Reservoirs under Coal-Bearing Strata;

Fulei Li, Xiang Guo, Bing Wang, Xufeng Zhang, Xuebin Yin, Yu Cao

Search and Discovery.com

...Abstract: Application of Dominant Frequency Band Reconstruction Inversion Technology in the Prediction of Oil-Bearing Reservoirs under Coal-Bearing...

Unknown

Finding a Better Path to Impedance Inversion; #41722 (2015)

Amit Kumar Ray, Ritesh Kumar Sharma, Satinder Chopra

Search and Discovery.com

.... As discussed earlier, the low-frequency band (less than 10 Hz) of the frequency spectrum is missing in the seismic data – and consequently, the transformed...

2015

Crystal oscillators and temperature compensated deterministic clock correction

Tim Bunting, Jason Jurok

International Meeting for Applied Geoscience and Energy (IMAGE)

... is an order or magnitude higher than CSAC drift. The cause of this difference is the impact of temperature on the pre-mobilization clock frequency...

2023

An application of FWI with progressive transfer learning

Shirui Wang, Jinjun Liu, Yuchen Jin, Xuqing Wu, Jiefu Chen

International Meeting for Applied Geoscience and Energy (IMAGE)

...(a) is the input data spectrum below 20 Hz, which shows that the dominante frequency is at around 12 Hz, and Second International Meeting for Applied...

2022

An improved Holo-Hilbert spectral analysis guided by fast matching pursuit

Chaohe Wang, Zhaoyun Zong

International Meeting for Applied Geoscience and Energy (IMAGE)

... a multiplicative process. Therefore, the information provided by time-frequency spectrum is incomplete. In order to quantify the nonlinearity...

2024

Detecting Fracture Zones in the Austin Chalk Using Seismic P- Wave Data

Ilyas Najmuddin

Houston Geological Society Bulletin

.... The shift in the spectrum towards lower frequencies is evident from the shift in the peak frequencies. Figure 6b. Peak frequency above the chalk minus...

2001

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