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The AAPG/Datapages Combined Publications Database
Showing 20,858 Results. Searched 200,619 documents.
Least-squares non-stationary triangle smoothing
Reem F. Alomar, Sergey Fomel
International Meeting for Applied Geoscience and Energy (IMAGE)
... smoothing in the shaping regularization framework within the plane-wave destruction algorithm (Fomel, 2002). Non-stationary smoothing applications improve...
2022
A Reply to Porter's Review
John Morton
Petroleum Exploration Society of Australia (PESA)
... in saturation equations such as the Simandoux (1963) equation currently in vogue with operating companies and the cation exchange capacity (CEC) used...
1990
Practical Petrographic Classification of Limestones
Robert L. Folk
AAPG Bulletin
... of the sea floor, or by low tides allowing wave attack on exposed, mudcracked flats. Specifically excluded are fragments of consolidated limestone eroded...
1959
Some Unique and Imaginative Geological Features (Mimetoliths) in Selected Limestone Sites in Malaysia: Study on Their Formational Processes and Geotourism Potentials
Dony Adriansyah Nazaruddin, Hafzan Eva Mansor, Mohammad Muqtada Ali Khan
Geological Society of Malaysia (GSM)
...), rainfall, solution process, rockfalls, water and wave erosion, and sea level changes. In theory, extensive areas of karst evolve in carbonate rocks...
2017
Advanced Approach Toward Understanding Geologically Complex Area Using MDRS (Multi-Dip CRS): A Case Study
Naoshi Aoki, Shogo Narahara, Akihisa Takahashi, Tsukasa Nishiki
Indonesian Petroleum Association
... be represented by the following equation: 2 ⎛ ⎞ 2 sin α T (x m,h) = ⎜ T0 + (x m − x 0) ⎟ ⎜ ⎟ v0 ⎝ ⎠ 2 2T cos α , + 0 K N (x m − x 0) 2 + K NIP h 2 v0 2...
2011
Abstract: Exact, Linear and Nonlinear AVO in Terms of Poroelastic Parameters; #90187 (2014)
Steven Kim and Kris Innanen
Search and Discovery.com
... Innanen, University of Calgary, Calgary, Alberta, Canada Summary AVO is a tool that can model amplitudes of wave signatures that reflect across...
2014
Using anisotropic rock physics to model VTI parameters
Marco A. Perez
International Meeting for Applied Geoscience and Energy (IMAGE)
... the fractures are oriented. Results are expressed in terms of vertical P and S wave velocity and Thomsen’s parameters. (13) 3(𝜏2 +9) and pp...
2023
Deep learning Laplace-Fourier full-waveform inversion with virtual supershot gathers
Lei Fu, Daniele Colombo, Weichang Li, Ernesto Sandoval-Curiel, Ersan Turkoglu
International Meeting for Applied Geoscience and Energy (IMAGE)
... constant density acoustic wave equation in the time domain is given by [∇2 − 1 𝜕2 𝑐(𝒙)2 𝜕𝑡 2 ] 𝑝(𝒙, 𝑡) = 𝑓(𝒙, 𝑡) (1) where...
2022
Obtaining Low Frequencies for Full Waveform Inversion by Using Augmented Physics
Eldad Haber, Eran Treister, Elliot Holtham
Petroleum Exploration Society of Australia (PESA)
... of the Helmholtz equation (in frequency), or the wave equation (in time). The data fitting requires some optimization algorithm, typically some descent algorithm...
2016
Analysis of geologic structures using deep sonic imaging
Nobuyasu Hirabayashi, Leon Dahlhaus, Rajeev Kumar, Jeroen Jocker, Erik Wielemaker, Manish Lal Khaitan, Charles Naville
International Meeting for Applied Geoscience and Energy (IMAGE)
... used in stacking where Ns = N/2 or N/4, ∆θ is the azimuth step of receiver, and θrb is the relative bearing of the tool. Waveforms given by equation 3...
2024
Prediction and attenuation method of surface-related multiple based on characteristic reflector
Jian Xiang, Huazhong Wang, Chengliang Wu
International Meeting for Applied Geoscience and Energy (IMAGE)
... streamers. In the case of known background velocity and subsurface reflectivity, SRMs can be predicted through wave equation modeling (Pica et al...
2024
Characterizing mudstones and fault structure in Bumita Quarry, Perlis through integrated geophysical techniques
Nordiana Mohd Muztaza, Hazrul Hisham, Teoh Ying Jia, Muhammad Taqiuddin Zakaria, Nur Azwin Ismail, Mohd Firdaus Md Dan, Azlan Md Dan M.F. M., Taiwo Adewumi
Geological Society of Malaysia (GSM)
... to geophysicists (Kearey et al., 2002). The seismic refraction method employs 2 wave propagation through the Earth, a process influenced by the elastic...
2024
Velocity continuation with Fourier neural operators for accelerated uncertainty quantification
Ali Siahkoohi, Mathias Louboutin, Felix J. Herrmann
International Meeting for Applied Geoscience and Energy (IMAGE)
... by linearizing the nonlinear relationship between shot records and the squared-slowness model, governed by the wave-equation. In its simplest acoustic...
2022
Appendix A: Considerations for Optimum 3-D Survey Design, Acquisition and Processing
R. Malcolm Lansley
AAPG Special Volumes
... amplitude processing is essential. When wave equation consistent processes are being considered, inadequacies in the sampling will result in amplitude...
2011
Hybridised Weighted Boot-Strap Differential Semblance
Hamish Wilson, Lutz Gross
Petroleum Exploration Society of Australia (PESA)
... simplification of the Zoeppritz equation (Shuey, 1985) where the fitting parameters in the trend were found through the minimisation of the trend model...
2016
Analytical Method to Accurately Estimate Overpressure Magnitude: The Case Study from Indonesia's Tertiary Basins
Agus M. Ramdhan, Lambok M. Hutasoit, Arifin
Indonesian Petroleum Association
... (1975) introduced empirical equation to estimate effective stress from the sonic log as illustrated in Figure 1 by using the following equation...
2021
Application of Robust Noise Reduction on a Land 3D Seismic Data
Agus Abdullah, Jesse Shaw
Indonesian Petroleum Association
... surface-wave noise and requires no iterations to exactly match the dispersion relations of the noise wavetrains. It is more robust than other...
2012
Abstract: Processing 3-C Heavy Oil Data for Shallow Shear-wave Splitting Properties; #90174 (2014)
Richard Bale, Tobin Marchand, Keith Wilkinson, Kurt Wikel, and Robert Kendall
Search and Discovery.com
...Abstract: Processing 3-C Heavy Oil Data for Shallow Shear-wave Splitting Properties; #90174 (2014) Richard Bale, Tobin Marchand, Keith Wilkinson...
2014
Prediction of multiple origin overpressure in deep fold-thrust belt: A case study of Kuqa subbasin, Tarim Basin, northwestern China
Changyu Fan, Gang Wang, Zhenliang Wang, Xiaojie Han, Jie Chen, Kuaile Zhang, and Baoshou Zhang
AAPG Bulletin
... equation revisited: Geophysics, v. 63, no. 2, p. 460–464, doi:10.1190/1.1444347. Eaton B. A., 1972, Graphical method predicts geopressures worldwide...
2021
Application of generalized radon transform migration to crosswell seismic geometry
Shujaat Ali, Olga Podgornova, Takashi Mizuno, Joel Le Calvez
International Meeting for Applied Geoscience and Energy (IMAGE)
... is carried out through a heterogeneous velocity model. It is followed by a constant velocity map migration as the second step. Wave equation (Cheng and Zhang...
2024
Note on a Mode of Piston Core Disturbance: NOTES
Y. Igarashi, J. B. Ridlon, J. R. Campbell, R. L. Allman
Journal of Sedimentary Research (SEPM)
... effect is not present. Core surface examination revealed only a thin surficial smear of the sea-bottom material. It is interesting that spherical objects...
1970
Rock Physics Diagnostics as a Prerequisite for Optimal Petrophysics
Akash Mathur, Hilfan Khairy
Indonesian Petroleum Association
... is linear addition of time taken by P-wave to pass through the matrix and time taken to pass through the fluid. This equation assumes...
2021
Decadal Behavior of Tidal Inlet–Associated Beach Systems, Northwest Ireland, in Relation to Climate Forcing
Marianne C. O’Connor, J. Andrew G. Cooper, Derek W. T. Jackson
Journal of Sedimentary Research (SEPM)
..., G., Bertin, X., and Taborda, R., 2010, Wave climate variability in the northeast Atlantic Ocean over the last six decades: Ocean Modelling, v. 31, p...
2011
Current Trends in Geophysics
H. E. Stommel, J. M. Graul
Indonesian Petroleum Association
.... Processing has kept pace, aided by a trend toward industry-academic research and development projects. Developments include ever-expanding wave equation...
1978
Calculating Sandstone-Shale Ratios from Growth Normal Fault Dips on Seismic Profiles
R. E. Bischke , J. Suppe
GCAGS Transactions
... type. Their basic equation, based on conserving solid volume, is (see Figure 3). [tan ]/[tan o] = [(1 - o)]/[(1 - )] (1) where and o = Final and initial...
1990