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The AAPG/Datapages Combined Publications Database
Showing 1,541 Results. Searched 200,616 documents.
Karst Cavern Identification and Deep Imaging in the Delaware Basin Using Magnetotellurics
Patricia de Lugão, Eric Corrêa, Berthold Kriegshäuser, Isaac Santos, Ludwig Kriegshauser
Unconventional Resources Technology Conference (URTEC)
... of the electric and magnetic fields. The time series are then Fourier-transformed to the frequency domain. The ratio of orthogonal electric over magnetic field...
2024
Pebble Shape (and Size!): REPLY
Werner K. Illenberger
Journal of Sedimentary Research (SEPM)
... a circular Fourier transformation (Davis 1986, p. 347). I ignored these aspects because they were not relevant to my study. S/I and I/L are orthogonal...
1992
Continuous Sea-Floor Spreading in Red Sea: An Alternative Interpretation of Magnetic Anomaly Pattern
J. L. Labrecque , N. Zitellini
AAPG Bulletin
... will express the model in terms of its spectrum. However, we will explain the geologic implications of this model. The general expression for the Fourier...
1985
Frequency-Domain Waveform Tomography in the Foothills: Velocity Model Estimation with Synthetic Long-Offset Data
Search and Discovery.com
... transformed by discrete Fourier transform to the time-domain. (a) (b) Figure 1: Long-offset shot gathers from (a) a real dataset collected...
2013
Spherical Wave Model Tests of VSP-Based Q-Estimation Techniques
Search and Discovery.com
... wavefield can then be obtained by inverse Fourier transforming. Note that Equation (1) models transmitted waves only and, because of the Bessel...
2013
Abstract: Fracture Detection in the Migrated Domain: Practical Aspects of Prestack Time Migration of Azimuthally-limited 3D Land Data Volumes; #90171 (2013)
Mike Perz, Juefu Wang, and Ye Zheng
Search and Discovery.com
... be considerable. The present algorithm, which is a Fourier reconstruction technique based on the work of Liu and Sacchi (2004), assumes a smooth energy...
2013
Abstract: Prestack Rank-Reduction-Based Noise Suppression: Theory; #90171 (2013)
Stewart Trickett and Lynn Burroughs
Search and Discovery.com
.... The general method is as follows: Take the Discrete Fourier Transform (DFT) of each trace. For each frequency within the signal band... { 1. Place...
2013
Abstract: The Origin of Hydrocarbons in Fluid Inclusions in Diamonds; #90172 (2014)
Maya G. Kopylova
Search and Discovery.com
... the Fourier-Transform Infrared (FTIR) spectroscopy. The presence of hydrocarbons in these diamonds were interpreted as artifacts of grease or acryl paint...
2014
Abstract: Application of a Tomographic Velocity Model to the Prestack Depth Migration of a Buried Valley; #90172 (2014)
Oluwafemi Ogunsuyi, Douglas R. Schmitt
Search and Discovery.com
... transformations: Geophysics, 66, 1612–1621. Stoffa, P.L., J.T. Fokkema, R.M. de Luna Freire and W.P. Kessinger, 1990, Split-step fourier migration: Geophysics...
2014
Abstract: How much well do you need in Acoustic Impedance Inversion?; #90174 (2014)
Heather J. E. Lloyd and Gary F. Margrave
Search and Discovery.com
... and inverse Fourier transformed to produce the acoustic impedance inversion. Selecting an appropriate low cut-off frequency is not always a simple task...
2014
CSPG/CSEG/CWLS GeoConvention 2012, May 14-18, 2012 Calgary TELUS Convention Centre & ERCB Core Research Centre, Calgary, Alberta, Canada; - Abstracts, #90174 (2014).
Search and Discovery.com
2014
Abstract: Quantitative Predication for Reservior Porosity via AVO; #90187 (2014)
Li Ang, Chen Shumin, Zhang Erhua, and Ju Linbo
Search and Discovery.com
.... Geophys., Expanded Abstracts， 252-254． Hargreaves N D’Calvert A J.Inverse Q filtering by Fourier transform. Geophysics,1991,56(4): 519-527...
2014
Abstract: Estimating Q from Hydraulic Fracture Related Seismicity; #90187 (2014)
Gisela Viegas, Adam Baig, Ted Urbancic, Eric von Lunen, Jason Hendrick, and Sean Lovric
Search and Discovery.com
...: theory and methods: 932 pp., Freeman, San Francisco, California. Anderson, J. G. and S. Hough, 1984, A model for the shape of the Fourier amplitude...
2014
Abstracts: Full Waveform Inversion Using One-way Migration and Well Calibration; #90173 (2015)
Gary F. Margrave, Robert J. Ferguson, and Chad M. Hogan
Search and Discovery.com
..., the hat (^) over a variable indicates its temporal Fourier transform, ˆ ˆ s x, z , is a model of the source wavefield for source s propagated...
2015
Understanding Lithologic Significance of Amplitude Envelope and Acoustic Impedance within Oligocene and Miocene Strata, South Texas Gulf Coast; #40577 (2010)
Osareni Ogiesoba, Ursula Hammes
Search and Discovery.com
... of amplitudes should be performed within individual systems tracts when relating amplitudes to lithology. Reference Bracewell, R.N., 1965, The Fourier...
2010
Microseismic Event Spectrum Control and Strain Energy Release in Stressed Rocks; #40897 (2012)
Alexander O. Rozanov
Search and Discovery.com
..., median frequency f frequency, centroid domain using frequency, standard Fast Fourier deviation of a signal. Transform 20 Ch 1 -20 -10 0 10...
2012
Application of Spectral Decomposition and Seismic Attributes to Understand the Structure and Distribution of Sand Reservoirs within Tertiary Rift Basins of Gulf of Thailand, #40992 (2012)
Mirza Naseer Ahmad, Philip Rowell
Search and Discovery.com
... decomposition (Discrete Fourier Transform) techniques, semblance and sweetness on a seismic data set from the Pattani Basin and on selected frequency slices...
2012
Linking Channel-Margin Bed Thickness to Hydrodynamics in the Tidally Influenced Fraser River, British Columbia; #50879 (2013)
Andrew La Croix, Shahin Dashtgard, and James MacEachern
Search and Discovery.com
... extends landward of turbidity max Seasonal Cyclicity in Fraser River IHS Autocorrelation, Fourier… Qualitative cyclicity in structure...
2013
Alternative Workflow for 3D Basin Modeling in Areas of Structural Complexity - Case Study from the Middle Magdalena Valley, Colombia; #10920 (2021)
Román González, Carlos Suarez, Luis Rojas
Search and Discovery.com
... Thermal Gradient (°C/km) Fourier´s first law q = -k * DT Where q is Heat flow, K is conductivity and DT is Thermal gradient. HEAT FLOW Implications...
2021
Pore-water chemistry: A proxy for tracking the signature of ongoing silica diagenesis
Shahab Varkouhi, Nicholas J. Tosca, Joseph A. Cartwright
Journal of Sedimentary Research (SEPM)
..., Application of Fourier Transform Infrared Spectroscopy to silica diagenesis: the opal-A to opal-CT transformation: Journal of Sedimentary Research, v. 65...
2020
Using laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) to explore geochemical taphonomy of vertebrate fossils in the Upper Cretaceous Two Medicine and Judith River Formations of Montana
Raymond R. Rogers, Henry C. Fricke, Vittorio Addona, Robin R. Canavan, Christopher N. Dwyer, Cara L. Harwood, Alan E. Koenig, Rachel Murray, Jeffrey T. Thole, Josephine Williams
PALAIOS
... of fissile lignite and ironstone are common, especially in upper reaches of the unit. The JRF accumulated under considerably more mesic conditions than...
2010
Formation of Lateral Patterns In Rock Properties By Dolomitization: Evidence From A Miocene Reaction Front (Bonaire, Netherlands Antilles)
David A. Budd, Whitney D. Mathias
Journal of Sedimentary Research (SEPM)
..., B.H., 1992, Fourier and spectral applications, in, Press, W.H., Teukolsky, S.A., Vettererling, W.T., and Plannery, B.P., eds., Numerical Recipes...
2015
PRESERVATION OF FOSSIL MICROBES AND BIOFILM IN CAVE POOL CARBONATES AND COMPARISON TO OTHER MICROBIAL CARBONATE ENVIRONMENTS
LESLIE A. MELIM, DIANA E. NORTHUP, PENELOPE J. BOSTON, MICHAEL N. SPILDE
PALAIOS
...). In addition, using Fourier transform infra-red (FTIR) spectroscopy, Preston et al. (2014) identified nucleic acids, proteins, and lipids in a Hidden...
2016
Fossilization of the Eocene monkeyhair laticifer tree from Geiseltal, Germany: a deeper understanding using micro-CT and pyrolysis GC/MS
Victoria E. McCoy, Arnoud Boom, Oliver Wings, Torsten Wappler, Conrad C. Labandeira, Carole T. Gee
PALAIOS
... Orr and two anonymous reviewers. This is contribution no. 2 of the DFG Research Unit 2685, ‘‘The Limits of the Fossil Record: Analytical...
2021
Chapter 5: Gas Storage in the Upper Devonian–Lower Mississippian Woodford Shale, Arbuckle Mountains, Oklahoma: How Much of a Role Do Chert Beds Play?
Neil S. Fishman, Geoffrey S. Ellis, Adam R. Boehlke, Stanley T. Paxton, Sven O. Egenhoff
AAPG Special Volumes
... and mudstones: New York, Springer, 297 p. Rice, S. B., H. Freund, W. L. Huang, J. A. Cluse, and C. M. Isaacs, 1995, Application of Fourier transform infrared...
2013