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The AAPG/Datapages Combined Publications Database
Showing 193 Results. Searched 200,293 documents.
Abstract: Anisotropic Frequency-Dependent Spreading of Seismic Waves from VSP Data Analysis; #90174 (2014)
Amin Baharvand Ahmadi and Igor Morozov
Search and Discovery.com
... first-arrivals amplitudes in a multi-offset VSP dataset. The inversion reveals variations of geometrical attenuation (wavefront curvatures...
2014
The Application of 2D Common-Offset Common-Reflection-Surface (CO CRS) Stack Method Towards Synthetic Data
Parapaty Halley, Rachmat Sule, Teuku Abdullah Sanny
Indonesian Petroleum Association
..., respectively. On this, we consider the near velocity vS = vG as constant. The quantities K1, K2, and K3 are wavefront curvatures associated to the central...
2009
Migration Amplitude Recovery using Curvelets
Peyman P. Moghaddam
Search and Discovery.com
... linear system of equations using linear solvers. Examples Figure 1 shows three different curvelets in different locations and angles before and after...
Unknown
Migration Amplitude Recovery using Curvelets
Peyman P. Moghaddam
Search and Discovery.com
... linear system of equations using linear solvers. Examples Figure 1 shows three different curvelets in different locations and angles before and after...
Unknown
Poro-acoustoelasticity FD simulation of elastic wave propagation in prestressed porous media
Haidi Yang, Li-yun Fu
International Meeting for Applied Geoscience and Energy (IMAGE)
.... Velocity-Stress Poro-Acoustoelasticity equations Traditional 2oeCs (bulk and shear moduli) in the realm of linear elasticity are not sufficient to describe...
2022
Abstract: 2D Depth Velocity Analysis without Tomography; #90187 (2014)
J. Patrick Butler and Randy Kolesar
Search and Discovery.com
...Abstract: 2D Depth Velocity Analysis without Tomography; #90187 (2014) J. Patrick Butler and Randy Kolesar AAPG Search and Discovery Article #90187...
2014
Seismic Imaging and Interpretive Model Building in the Colombian Andes
Rob Vestrum
Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)
.... Depth migration in thrust-belt environments like the Colombian Andes requires an interpretive approach to building a depth-migration velocity model...
2006
Wide-angle AVO-inversion using constant P-traces: AVP-inversion
Dennis Cooke
International Meeting for Applied Geoscience and Energy (IMAGE)
... where a high-quality imaging velocity comes from FWI. For time or depth migrations, is possible to avoid the above high-angle data error by not using...
2022
A fast sweeping method based on coordinate transformation for eikonal equation on unstructured triangular meshes
Xin Chen, Danping Cao, Xin Fu
International Meeting for Applied Geoscience and Energy (IMAGE)
... is from within the current triangle, i.e., the vertical line from node C to the wavefront should fall inside the triangle. As shown in Figure 2a, when...
2024
Abstract: Statics or Statistics?The Near-Surface Revisited; #90211 (2015)
David Henley
Search and Discovery.com
... noises, which often mask reflections, this layer, through its irregular thickness and/or velocity structure also causes timing and phase differences...
2015
Geometric mode decomposition method for diffraction separation
Peng Lin, Suping Peng, Yang Xiang, Chuangjian Li, Xiaoqin Cui
International Meeting for Applied Geoscience and Energy (IMAGE)
... can effectively represent reflections with directional and linear geometric features by adaptively decomposing seismic data as a combination...
2022
Exact kinematic behavior of the P-SV converted wave in a vertical transversely isotropic medium
Guillaume Cambois
International Meeting for Applied Geoscience and Energy (IMAGE)
... wave does not have a wavefront (it propagates first as a qP wave and then as a qSv wave), Equations 24 and 25 give us the opportunity to create a pseudo...
2023
Phase-Ray Maslov Summation: A Complete Finite-Frequency Ray Method
Tianfei Zhu
Search and Discovery.com
.... It is, for example, a key element of the Kirchhoff migration algorithm which has been a major tool over the past decade for prestack depth imaging...
Unknown
Phase-Ray Maslov Summation: A Complete Finite-Frequency Ray Method
Tianfei Zhu
Search and Discovery.com
.... It is, for example, a key element of the Kirchhoff migration algorithm which has been a major tool over the past decade for prestack depth imaging...
Unknown
Taking Advantage of RTM Surface Offset Gathers for Iterative Salt Modeling and Subsalt Reservoir Image Enhancement
Search and Discovery.com
N/A
Basic Seismic Processing: Part 7. Geophysical Methods
Peter M. Duncan
AAPG Special Volumes
... width in space, which reduces spatial resolution. As the seismic wavefront travels outward from the source, it not only gets weaker (as a result...
1992
Seismic Exploration Using Shear Waves
R. Garotta
Indonesian Petroleum Association
... Velocity These seismic and resistivity logs show good homogeneity of the layer between 1.2 and 1.45 km depth. Thus, these limits have been chosen...
1978
Seismic imaging uncertainty using deep learning predicted Greens functions
Han Liu, Anar Yusifov, Muhong Zhou, Linda Hodgson
International Meeting for Applied Geoscience and Energy (IMAGE)
... generate the guide images using time to depth conversion of the receiver data through velocity model. The guide image for both source and receiver...
2022
Seismic first arrival tomography for top salt velocity update: A case study in the Santos Basin, Brazil
Paulo H. B. Alves, Marco Cetale, Roger M. Moreira, Sérgio L. E. F. da Silva, Jorge Lopez
International Meeting for Applied Geoscience and Energy (IMAGE)
... alleviate depth-velocity ambiguity compared to conventional two-way time tomography. Conversely, Zelt and Barton (1998) underscore the importance...
2024
Limitations on Resolution of Seismic Reflections and Geologic Detail Derivable from Them: Section 1. Fundamentals of Stratigraphic Interpretation of Seismic Data
Robert E. Sheriff
AAPG Special Volumes
... exploration are in the general range of 30 to 300 m. Wavelength generally increases with depth because: (1) velocity increases, and (2) frequencies become...
1977
Acoustic modelling with elastic AVA effects
Robin P. Fletcher, James Hobro, James Rickett
International Meeting for Applied Geoscience and Energy (IMAGE)
... acoustic FWI to build the pressure wave velocity model using diving wave long offset data and then fix the propagation velocity, restrict the offsets...
2023
Abstract: Prestack Signal Enhancement by Non-hyperbolic MultiFocusing; #90187 (2014)
Evgeny Landa, Alex Berkovitch, and Kostya Deev
Search and Discovery.com
... of the enhanced gathers for the true velocity model. Figure 4a shows the PSDM result using the original gathers. Figure 4b is a depth section obtained from...
2014
The effects of seismic anisotropy on mining seismology
Andrew King
Petroleum Exploration Society of Australia (PESA)
... falls. These uses of microseismics require that the seismic events be accurately located, which can only be done using an accurate velocity model...
2019
3D model-building technique by fusing near surface and deep structure and its applications
Luo Kaiyun, Yang Jian, Ma Lan, Men Zhe, Long Bo
International Meeting for Applied Geoscience and Energy (IMAGE)
...., L. Guofa, Z. Xinyu, T. Naxin, and Z. Tongli, 2014, Pre-stack depth migration velocity model-building method analysis: Petroleum Geophysical...
2024
erformance of Seismic Arrays in the Presence of Weathering Layer Variations, #41841 (2016).
Jubran Akram, Abdullatif A. Al-Shuhail
Search and Discovery.com
... of the plane wavefront, Vw is the weathering layer velocity, b is the channel depth, and β is the angle of the line connecting the intersection point...
2016