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The AAPG/Datapages Combined Publications Database
Showing 20,600 Results. Searched 200,293 documents.
Abstract: Tomography of a Velocity Modeland Location of Microseismic Events with P, Sv and Sh Waves; #90224 (2015)
Malgorzata Chmiel and Thomas Bardainne
Search and Discovery.com
... analytical and numerical modules (time 3 D - based on the 3D eikonal equation developed by Podvin and Lecomte (1991) and an anisotropic ray tracer...
2015
Quantitative seismic interpretations to detect biogenic gas accumulations: a case study from Qaidam Basin, China
Yexin Liu, Zhuoheng Chen, Liqun Wang, Yongshu Zhang, Zhiqiang Liu, Yanhua Shuai
CSPG Bulletin
... coefficients (Hampson and Russell, 2013). The linear Conjugate Gradient (CG) method is one of the best methods to solve equation [2]. Ideally, thousands...
2015
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
Spherical-Wave Computational AVO Modelling in Elastic and Anelastic Isotropic Two-Layer Media; #41564 (2015)
Arnim B. Haase, Charles P. Ursenbach
Search and Discovery.com
... velocity α1 = 2000 m/s is dictated by a reservoir depth of 500 m and a corresponding two-way travel time of approximately 500 ms. The layer parameters...
2015
2001
Star: Shallow Time Anomaly Replacement
Michael O. Marcoux, Lee Lu
Southeast Asia Petroleum Exploration Society (SEAPEX)
... using wave equation modelling. The results of the ray tracing experiment follow. Model and Synthetic Data The velocity-depth model selected...
1982
Wave equation traveltime Kirchhoff with real data applications
Hu Jin, Vladimir Bashkardin, Petr Jilek, Chandan Kumar, Han Liu, John Etgen, Madhav Vyas, Ganyuan Xia
International Meeting for Applied Geoscience and Energy (IMAGE)
... on ray tracing it fails to generate accurate images for velocity models produced by FWI that have large velocity contrasts. Smoothing high-resolution...
2023
Structure Beneath Continental Shelf, Northeastern Gulf of Mexico
John W. Antoine , James L. Harding
AAPG Bulletin
... University in conjunction with University of Georgia. Fig. 11. Circular segment of ray path between interfaces bounding layer of linear velocity...
1965
Streamlining subsurface insights: Single extrapolation for holistic Green's function generation
Hongwei Liu
International Meeting for Applied Geoscience and Energy (IMAGE)
... of migration velocity models. Traditionally, prestack depth migration (PSDM) based on ray-tracing-based Kirchhoff integration is predominantly employed...
2024
Can Resistivity be Predicted from Elastic Properties?
Maman Hermana, Luluan A. Lubis, Cow Weng Sum, Deva P Ghosh, Kazuki Ishikura
Indonesian Petroleum Association
... resistivity (ohm-m), z is depth (km) and v is velocity (km/s). Faust equation correlates velocity with resistivity with nonlinear relation...
2017
Simultaneous Inversion for Microseismic Event Location and Velocity Model in Vaca Muerta Formation
Zhishuai Zhang, Jing Du, Fuchun Gao
Unconventional Resources Technology Conference (URTEC)
... predicted using these predetermined velocity models. The forward modeling was conducted by solving the Eikonal equation for the first arrivals, which...
2017
Abstract: Reverse Time Migration of Prestack Elastic Data; #90224 (2015)
R. Ferner and M. D. Sacchi
Search and Discovery.com
... equations, parallel and perpendicular to the boundary. The splitting procedure is delineated in equation 3 for the horizontal particle velocity component vx...
2015
Abstract: Statics Preserving Sparse Radon Transform; #90224 (2015)
Nasser Kazemi
Search and Discovery.com
... aperture of the data, missing traces, aliasing, finite number of scanned ray parameter, noise and statics are the major sources of artifacts. This fact...
2015
Abstracts: Application of CSP Gather Modeling for Determination of Velocity Smoothing Operator for Prestack Kirchhoff Depth Migration; #90173 (2015)
Hassan Khaniani and John C. Bancroft
Search and Discovery.com
... for the ray based depth migrations. However, for our analysis, we selected a scatter point located at (5500, 2450) m coordination of the Marmousi velocity...
2015
Abstract: Application of Acoustic Waveform Tomography to Marine Seismic Reflection Data Contaminated with Strong Guided Waves; #90187 (2014)
Rajesh Vayavur and Andrew. J. Calvert
Search and Discovery.com
... arrivals. The source estimate needed for the first inversion was derived from the initial velocity model derived by ray based tomography and an spike...
2014
Q-compensation imaging of anisotropic viscous quasi-acoustic media along wavefield propagation path
Bohan Zhang, Huazhong Wang
International Meeting for Applied Geoscience and Energy (IMAGE)
... in anisotropic absorption attenuation media are relatively cumbersome. In this paper, the 15-degree equation in the ray-centered coordinate system of VTI...
2022
Regularization for full-waveform inversion by generative diffusion model with score distillation
Bingbing Sun
International Meeting for Applied Geoscience and Energy (IMAGE)
... subsurface properties, including velocity, density, and anisotropy. Contrary to traditional methods that depend on approximations (like the ray-based...
2024
Extended Abstract: Full Waveform Inversion for Detailed Velocity Analysis
Jerry Kapoor, Denes Vigh
GCAGS Transactions
...) is an advanced velocity model building process that uses the full two-way wave equation. Existing methods use a ray-tracing approach to distribute velocity...
2016
On the connection between WRI and FWI: Analysis of the nonlinear term in the Hessian matrix
Ali Gholami, Hossein S. Aghamiry, Stephane Operto
International Meeting for Applied Geoscience and Energy (IMAGE)
... superimposed concrete structures of velocity 4000 m/s (Figure 3a). The dimensions of the model are 15 m in distance and 3 m in depth, and the grid spacing...
2022
Joint inversion of magnetotelluric and seismic travel time data with intelligent interpretation of geophysical models
Hongyu Zhou, Rui Guo, Maokun Li, Fan Yang, Shengheng Xu, Zuzhi Hu, Deqiang Tao
International Meeting for Applied Geoscience and Energy (IMAGE)
..., 1200-1600m and 1600-2000m, respectively. The resistivity and velocity of layers increase with depth. One or two anomalies are known to be located...
2022
Abstract: Modelling Near-field Effects in VSP-based Q-estimation Part 1: Theoretical Developments; #90171 (2013)
Arnim B. Haase and Robert R. Stewart
Search and Discovery.com
... show a linear dependence on frequency in the far-field but not in depth regions where the near-field becomes significant. Near-field effects are one...
2013
A Novel Method for Experimental Characterization of the Poroelastic Constants in Unconventional Formations
Deepak Gokaraju, Munir Aldin, Akshay Thombare, Abhijit Mitra, Sudarshan Govindarajan, Robert Patterson
Unconventional Resources Technology Conference (URTEC)
... velocity, axial and radial strains were measured to evaluate the use of velocity as a gauge. Two Linear Variable Differential Transformers (LVDT) were...
2018
Current Trends in Geophysics
H. E. Stommel, J. M. Graul
Indonesian Petroleum Association
... of in this connection, wave equation processing is by no means limited to this important concept. Improved velocity estimates, stacking procedures, coherency...
1978
The Suitable Method in Generating True Depth Structure Maps to Eliminate Wonocolo Push-Down Effect on Seismic Data and Its Impact on Prospect Evaluation, North Madura Platform, East Java Basin
Haryono Haryanto, Rizki Krishna Pratama, Riaz Alai, M. Afiq B. Mokhtar, Pongga Wardaya, Yonghe Guo, Jun Wang
Indonesian Petroleum Association
... function method resulted depth structure maps with unsolved push-down effect artifact, as it is not respecting lateral variation of velocity. 3D paleo...
2018
Abstract: Uncertainty Space for Microseismic Event Locations using a Double Difference Algorithm; #90174 (2014)
Timur Mukhtarov
Search and Discovery.com
... to distance between the events and the receiver and the scale length of the velocity heterogeneity (Waldhauser, 2000). Figure 2: Ray path non...
2014