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Showing 20,600 Results. Searched 200,293 documents.
Abstract: Complex-beam Migration: Non-recursive and Recursive Implementations; #90187 (2014)
Tianfei Zhu
Search and Discovery.com
..., z) (1) 2u 2v 2 (x)u 0, where u u(x, ) is the wavefield and v(x) the velocity of the medium. The geometric-ray solution to this x-domain...
2014
Time-Depth Modeling in High Pore-Pressure Environment, Offshore East Coast of India; #30463 (2016)
Nidhi Jindal, Ajoy Kumar Biswal, Kumar Hemant Singh
Search and Discovery.com
... tested on four models: a) the linear interval velocity model in depth, b) the linear interval velocity model in time (TWT), c) the average velocity model...
2016
Finding the reservoir in an intensely scattered wavefield: A case study from the Central Sichuan Basin, China
John Coffin, Mengmeng Zhang, Panos Doulgeris, Peter Haffinger, Angie Kelsay, Jinsong Li
International Meeting for Applied Geoscience and Energy (IMAGE)
... is to convert the offset gathers to ray parameter gathers using the interval velocity model from the PSTM seismic processing. The procedure is conceptually...
2022
Abstract: Application of 2D Crosscorrelation and Radon Transform for Analysis of Double Couple Microseismic Source; #90187 (2014)
Neda Boroumand and Hassan Khaniani
Search and Discovery.com
... 0.1 0.2 Time (s) Time (s) 0.2 -200 0 200 Depth lag (m) a) b) c) d) Figure 2: a) A sample time snap of an elastic wavefield. b) Ray tracing simulation...
2014
ABSTRACT: A Hybrid Wave Equation Datuming and Kirchhoff PSDM Solution for Accurate Onshore Seismic Imaging, by Hu, Leon L.; Saleh, Saleh; Sliz, Krzysztof; Ley, Robert E.; #90141 (2012)
Search and Discovery.com
2012
Least-squares RTM with shifted total variation regularization for depth imaging of sparse short-offset seismic data
Toktam Zand, Andrzej Gorszczyk, Ali Gholami, Hasan Ghasemzadeh, Alison Malcolm
International Meeting for Applied Geoscience and Energy (IMAGE)
..., in order to account for multiples as signal rather than noise, we recursively update the migration velocity model in the frame of a non-linear migration...
2022
ABSTRACT: First Arrival Tomography Using Depth-Varying Velocity Gradients; #90113 (2010)
Hui Liu and Hua-Wei Zhou
Search and Discovery.com
... and depth-varying velocity gradient of each model layer. An efficient ray tracing is developed for the model with depth-varying velocity gradients. For areas...
2009
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)
... accelerate velocity continuation, trading wave-equation solves for a simple neural network inference. This is of considerable importance...
2022
Prediction of Fracture Porosity from Well Log Data by Artificial Neural Network, Case Study: Carbonate Reservoir, DEPOK Field
Okok Wijaya, Pebrian Tunggal P, Ahmat Dafit Hasim, Depta Mahardika, Sungkono, Bagus Jaya S
Indonesian Petroleum Association
... values of well log data reading must be normalized between 0 and 1 using the maximumminimum normalization given by the equation: Gamma ray log - Low...
2015
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
Abstract: AVAZ Inversion for Fracture Orientation and Intensity: a Physical Modeling Study; #90187 (2014)
Faranak Mahmoudian and Gary F. Margrave
Search and Discovery.com
... equation 26. For a given offset and depth of the fractured layer, the primary ray-path is traced to determine the incident angle, using a PP raytracing...
2014
Chart Migrations
Frank A. Roberts
Oklahoma City Geological Society
... or irregular variations of velocity with time or depth. The ray paths in this chart are labeled with the t or time dip for a fixed spread length...
1958
Abstract: Tomographic Reflected-Wave FWI Using Time Lag; #90254 (2016)
Geoff Clark, Yilong Qin
Search and Discovery.com
...-wavelength velocity model. However, ray theory does not properly describe wave propagation in the case of complex heterogeneities such as a low...
2016
AVO Analysis for Direct Hydrocarbon Detection in Field X in the Persian Gulf (Paper 5)
Mohammad Ali Riahi, Mohammad Emami Niri
Geological Society of Malaysia (GSM)
... velocity map of section was computed by finding a multi-linear relationship between sonic logs and attributes. Then this relationship was applied...
2006
Meramec Velocity Systematics
Jing Fu, Carl Sondergeld, Chandra Rai
Unconventional Resources Technology Conference (URTEC)
... the first equation, the Meramec velocity systematic shows good agreement with dipole wireline measurements even though there is a substantial...
2020
Determination of Velocity Model by Using NIP-Wave Tomographic Inversion: Application to Synthetic and Real Data
A. Hendriyana, R. Sule, Y. Akbar, L.A. Poerwaka, T.A. Sanny, Sardjito, Waluyo, Adriansyah
Indonesian Petroleum Association
... heterogeneous and appropriate for ray tracing. The velocity is used as first approximation of velocity field for pre-stack depth migration and updates...
2009
Seismic Signature as a Porosity Indicator in Early Miocene Reefs in the Madura Strait Via AVO Inversion and Modelling
Bimal R. Banerjee
Indonesian Petroleum Association
... Variations with Offset : Examples from South Sumatra. Geophysics Vol. 54 - No.8. Faust, L. Y, 1951. Seismic velocity as a function of depth and geologic...
1993
Incorporation of Geology, Wells, and Rock Physics into Anisotropy Estimation for Seismic Depth Imaging Enables True Earth Model, #40828 (2011)
Huyen Bui, Peck-Hwa David Ng, Jenny Zhou, Chih-Wen Kue, Mart Smith
Search and Discovery.com
.... Likely, it was thought that, if the depth-migrated velocity was wrong, seismic anisotropic functions (Thomsen’s delta and epsilon) were also wrong...
2011
Geobody-oriented interpretable velocity fusion modeling in depth domain with seismic facies informed segmentation method
Meng Li, Qingcai Zeng, Hao Shou, Nan Qin, Chunming Wang, Tongsheng Zeng
International Meeting for Applied Geoscience and Energy (IMAGE)
...Geobody-oriented interpretable velocity fusion modeling in depth domain with seismic facies informed segmentation method Meng Li, Qingcai Zeng, Hao...
2023
Reducing Uncertainties In Shear Wave Petrophysical Log Prediction By Using Deep Neural Network and Machine Learning Methods
Muhammad Faris Abdurrachman, Muhammad Dhafit Muhsin
Indonesian Petroleum Association
... line and Greenberg-Castagna’s Vp-Vs relationship. Castagna’s mud-rock line equation uses one variable, and linear trend applies only for brine...
2021
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
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
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
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
Seismic Migration: Part 7. Geophysical Methods
Ken Larner, David Hale
AAPG Special Volumes
... that is homogeneous (constant P-wave velocity) with the exception of an isolated boulder at some depth. Also shown are the straight ray paths traveled...
1992