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The AAPG/Datapages Combined Publications Database
Showing 19,572 Results. Searched 195,387 documents.
Tomography Techniques Applied to Near Surface Velocity Models in Complex Areas of Colombia
Jorge Monsegny, Saúl Guevara
Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)
... or the tomogram. Due to a lower ray density, linear methods do not define the velocity contrast in this zone. Zhang inversion defines better...
2008
Application of Wave Equation Tomography in Frontier Areas
Tien-when Lo, Guy W. Purnell
Indonesian Petroleum Association
... from prestack focusing velocity analysis and prestack depth migration. Both wave equation tomography and prestack focusing velocity analysis suggest...
1990
AAPG Memoir 76, Chapter 18: Velocity Estimation for Pore-Pressure Prediction
David W. Bell
AAPG Special Volumes
..., the common assumption that the logarithm of velocity is linear in depth is not consistent with check shot data. A single, definitive relationship...
2001
Application of finite difference eikonal solver for traveltime computation in forward modeling and migration
Amir Mustaqim Majdi, Seyed Yaser Moussavi Alashloo, Nik Nur Anis Amalina Nik Mohd Hassan, Abdul Rahim Md Arshad, Abdul Halim Abdul Latiff
Geological Society of Malaysia (GSM)
... is reciprocal to velocity. Ray and finite difference among known methods used to solve the eikonal equation (Kraaijpoel, 2003). Ray tracing method Ray...
2021
ABSTRACT: Seismic Modeling with One-Way Wave Equation, by Jiao, Jianwu; Saleh, Saleh M.; Verschuur, Eric; #90141 (2012)
Search and Discovery.com
2012
EXTENDED ABSTRACT: Applications of Wave Imaging Technologies to Improve Deep Gulf Prospecting
Morgan P. Brown, Joseph H. Higginbotham, Cosmin Macesanu, Oscar E. Ramirez
GCAGS Transactions
... section in the Gulf Coast normally exhibits a simple, depth-variable velocity profile, and prestack time migration (PSTM) methods generally produce...
2010
Abstract: Subsalt Migration Velocity Analysis with the Common Image Cube Approach, by K. Mansoor, O. Hermant, H. Baudon, S. Warzocha, and M. Van De Rijzen, #90188 (2014)
Search and Discovery.com
2014
Abstract: Method for Analysis and Display of Elastic Synthetic Shot Gathers, by K. H. Wrolstad, F. Aminzadeh, and C. K. von Kahrs; #90992 (1993).
Search and Discovery.com
1993
Application of Visco-Acoustic Full Waveform Inversion to Shallow-Water, Shallow-Gas Data, #41802 (2016).
Xin Cheng, Ronan Petton, Ian Anstey, Wai-Leong Lai, Denes Vigh, Gavin Menzel-Jones
Search and Discovery.com
... different constant-Q models. Figure 2. Comparison of (top) depth slice overlay of the initial velocity model, and (bottom) Q-FWI derived velocity...
2016
Abstract: Raypath-Consistent Shear Wave Statics; #90224 (2015)
Raul Cova, David Henley, and Kris Innanen
Search and Discovery.com
... by equation 3, 2D ray-tracing over a gridded model was performed. A low velocity layer with a dip of 45⁰ and velocity of 500 m/s was used for the raytracing...
2015
Imaging of Fractures and Faults inside Granite Basement Using Controlled Beam Migration (Geophysics Paper 5)
Don Pham, Jason Sun, James Sun, Qingbing Tang, Graeme Bone, Nguyen Truong Giang
Geological Society of Malaysia (GSM)
... in imaging technology and velocity model building tools, we reprocessed the same data through prestack depth migration, and achieved significant...
2008
Subsurface Characterizaton Using Microseismic Velocity, Attenuation, and Ansiotrophy Tomography in a Geothermal Field
Ahmad Syahputra, Andri Dian Nugraha, Rachmat Sule, Sri Widiyantoro
Indonesian Petroleum Association
... (reciprocal of velocity), where which is a function of position ds within the length of the ray element. source © IPA, 2014 – 38th Annual Convention...
2014
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
First-Arrival Traveltime Inversion in the CMP Domain: Method and Application
Search and Discovery.com
... the relationship between them. In the case of a linear increase in velocity with depth, the turning ray turns at the point of maximum depth...
2013
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
Visco-Acoustic Full-Waveform Inversion: A Case Study to Resolve High-Resolution Shallow Channel Absorption, Offshore Indonesia
Jun Wang, Yonghe Guo, Putri Supriandini, Kelik Moersidin, Rahmad Hidayat
Indonesian Petroleum Association
... velocity model building, while Q estimation for shallow channels is still a challenge. Ray-based Q tomography, using frequency-dependent amplitude decay...
2022
Diving wave tomography: Velocity modelling using first arrival traveltime
Amatul Syafi Abdul Basit, Abdul Rahim Md Arshad, Arulini Permalu
Geological Society of Malaysia (GSM)
... in the North Sea (Virieux & Operto, 2009). The linear relationship of velocity with distance travelled by seismic wave (ref. Equation 1) implied a constant...
2022
How to Make Velocity Corrections
John W. Daly
AAPG Bulletin
... assumes a linear increase in instantaneous velocity with depth the ray paths are circular. This is one of the more common assumptions used by up-to-date...
1944
Phase-Ray Maslov Summation: A Complete Finite-Frequency Ray Method
Tianfei Zhu
Search and Discovery.com
... unable to account for the inhomogeneity scattering effects. Based on a phase eikonal equation, on the other hand, the phase-ray method is capable...
Unknown
Phase-Ray Maslov Summation: A Complete Finite-Frequency Ray Method
Tianfei Zhu
Search and Discovery.com
... unable to account for the inhomogeneity scattering effects. Based on a phase eikonal equation, on the other hand, the phase-ray method is capable...
Unknown
Abstract: Near-Surface Velocity Estimation Using Source-Domain Full Traveltime Inversion and Waveform Inversion; #90319 (2018)
Lu Liu, Bowen Guo, Yi Luo
Search and Discovery.com
... tomography has been an efficient and robust tool to derive large-scale near-surface velocity models for decades (Zhang and Toksöz, 1998). Ray theory...
2018
Wave-Equation-Based Target-Oriented Inversion for Reservoir Characterisation, #41759 (2016).
Dries Gisolf, P.R. Haffinger, P. Doulgeris
Search and Discovery.com
... and primary reflections only, is linear modelling. • Wave-equation based modelling, with propagation in the full medium, transmission effects, multiple...
2016
Abstract: Turning-Ray Tomography and Tomostatics; #90224 (2015)
Babatunde Arenrin, Gary Margrave, and John Bancroft
Search and Discovery.com
... (FWI), wave equation datuming and prestack depth migration. In this research, we apply turning-ray tomography to the statics problem of the Hussar 2D...
2015
Prediction and Analysis of Geomechanical Properties of the Upper Bakken Shale Using Artificial Intelligence and Data Mining
George K. Parapuram, Mehdi Mokhtari, Jalel Ben Hmida
Unconventional Resources Technology Conference (URTEC)
... as the input and shear wave velocity as the output. Initially, the conventional well logs used were Depth, Gamma Ray (GR), and Bulk Density (RHOB...
2017
NMO Application in VTI Media: Effective and Intrinsic Eta (Geophysics Paper 6)
Joel Starr, Maz Farouki
Geological Society of Malaysia (GSM)
... and velocity in a CMP gather. NMO equations approximate the time shift which would be computed by tracing a ray through a horizontally layered Earth. A few...
2008