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The AAPG/Datapages Combined Publications Database
Showing 31,927 Results. Searched 195,502 documents.
NMO Application in VTI Media: Effective and Intrinsic Eta (Geophysics Paper 6)
Joel Starr, Maz Farouki
Geological Society of Malaysia (GSM)
... Brazil. Values of ηeff range from 0 – 0.141. The ηeff field was determined by residual migration velocity analysis using the Alkhalifah NMO equation...
2008
3D Seismic from Planning to Mapping
A. Kullerud, O. Nipen, H. E. Nordberg
Indonesian Petroleum Association
... migrated section representing a constant velocity layer. As can be seen the migration algorithm has worked properly. Due to spatial aliasing...
1985
Abstract: Derivation of Seismic Depth Sections
H. Buchholtz, W. Houba
Geological Society of Malaysia (GSM)
... in the presence of dipping overburden layers. In this case of substantial lateral velocity variation, the result of time migration is already erroneous...
1985
Abstract: Seismic Velocity Model Building in from Area of Complex Geology, Southern Alberta, Canada, by H. Isaac and D. Lawton; #90090 (2009).
Search and Discovery.com
2009
Abstract: Crosswell Imaging with LCB Beamlet, by Yueming Ye; Wu Ru-shan; Zhuang Xijin; #90163 (2013)
Search and Discovery.com
2013
An Experimental Study of Secondary Oil Migration (1)
LIONEL CATALAN, FU XIAOWEN, IOANNIS CHATZIS, and FRANCIS A. L. DULLIEN
AAPG Bulletin
... pressures are known for the saturations at which the oil just becomes disconnected. In most experiments, the migration front advanced at a constant rate...
1992
Effective Use of High Density VSP Measurements to Predict Pore Pressure and Estimate Mud Weight Ahead of Drilling in the Mahakam Delta, Indonesia
Mohammed Badri, Stephane Gazet, Gregoire de Tonnac
Indonesian Petroleum Association
.... In this case the effective stress does not decrease but remains constant causing the velocity to appear as a plateau on a velocity versus depth plot...
2005
PSDM for Unconventional Reservoirs? A Niobrara Shale Case Study
Morgan P. Brown, Joseph H. Higginbotham, Dave List, Chris Lang
Unconventional Resources Technology Conference (URTEC)
... to the success of depth migration. We began with an interval velocity derived from prestack time migration (PSTM). We utilized a WEM algorithm...
2013
PSDM for unconventional reservoirs? A Niobrara Shale case study; #80405 (2014)
Morgan P. Brown, Joseph H. Higginbotham, Cosmin Macesanu, Oscar E. Ramirez, Dave List, Chris Lang
Search and Discovery.com
... the magnitude of AVAZ response observed in the data. PSDM Velocity Analysis Rigorous, iterative velocity update proves key to the success of depth migration. We...
2014
Diving wave tomography: Velocity modelling using first arrival traveltime
Amatul Syafi Abdul Basit, Abdul Rahim Md Arshad, Arulini Permalu
Geological Society of Malaysia (GSM)
... constant velocity gather or quantitatively based on the semblance analysis. The latter involves the estimation of NMO velocities at discrete common...
2022
Extended Abstract: What is Wave Equation Pre-stack Depth Migration? An Overview
Andrew Long
Petroleum Exploration Society of Australia (PESA)
...Extended Abstract: What is Wave Equation Pre-stack Depth Migration? An Overview Andrew Long I TECHNICAL Focus What is Wave Equation Pre-stack...
2004
Application of Wave Equation Tomography in Frontier Areas
Tien-when Lo, Guy W. Purnell
Indonesian Petroleum Association
... about complex local geology makes building an initial velocity model for seismic data migration difficult. We developed a wave equation tomography method...
1990
Imaging Complex Structures in Colombia Full Wave Equation Migration Approach
Hector A. Alfonso, Luis E. Rojas, Weizhong Wang, Jie Zhang, Oz Yilmaz
Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)
... time migration of shot gathers, equivalently from the floating datum, using a range of constant velocities. Next, we combined the constant-velocity...
2008
Advances in Depth Imaging Technology: Rock Physics Guided Migration of Seismic Data in 3D
Nader C. Dutta, Sherman Yang, Jianchun Dai
Indonesian Petroleum Association
... GUIDED MIGRATION OF SEISMIC DATA IN 3D Nader C. Dutta* Sherman Yang* Jianchun Dai* ABSTRACT Conventional approaches to build velocity models for depth...
2012
High-Resolution Model Building in a Full-Azimuth Nodal Survey in the GOM
Sandip Chattopadhyay, Gary Rodriguez, Tefera Eshete, Guy Hilburn, TGS
GEO ExPro Magazine
... incorrect depth migration results and can lead to velocity distortions during successive tomography-based model building. The problem is instead...
2016
Velocity and Velocity
M. Al-Chalabi
Petroleum Exploration Society of Australia (PESA)
... if the so called 'velocity' parameter, used in the migration, accurately represented the true velocity field. It does not. As shown below, the 'velocity...
2000
Abstract: Least Square Migration in Image domain (LSMi) along with Better Velocity Modeling Improves Subsalt Imaging, Offshore Mediterranean, Case Study; #90319 (2018)
Ivica Mihaljevic, Mohamed Afia, Mahmoud M. Shabana, Mohamed Sheneshen, Hany M. Hussein, Mahmoud Ouda, Amr Ghanem, Refaat Zaki, Satyendra Rana, Maud Maud Cavalca, Laurence Letki
Search and Discovery.com
...Abstract: Least Square Migration in Image domain (LSMi) along with Better Velocity Modeling Improves Subsalt Imaging, Offshore Mediterranean, Case...
2018
TTI Wave Equation Migration by Phase-Shift Plus Interpolation
Richard A. Bale
Search and Discovery.com
... are dealing with VTI, TTI in 2-D or TTI in 3-D. We will consider the case of TTI in 2-D, characterized by VP0, the velocity parallel to the symmetry axis...
Unknown
TTI Wave Equation Migration by Phase-Shift Plus Interpolation
Richard A. Bale
Search and Discovery.com
... are dealing with VTI, TTI in 2-D or TTI in 3-D. We will consider the case of TTI in 2-D, characterized by VP0, the velocity parallel to the symmetry axis...
Unknown
Rapid Multiple-Scenario Depth Structure Risk Analysis Case Study in Cuulong Basin, Vietnam
Nguyen Nam, Hong Shien Lee
Indonesian Petroleum Association
... the use of picks helps to identify the reliability of picks and then eliminate the bad picks or bad horizons 1- Seismic velocity is PSTM migration...
2008
ABSTRACT: Pre-Stack Depth Migration and the Imaging of Complex Structures in the Wyoming Thrust Belt
Richard Postma
Wyoming Geological Association
... tools exist, and are shown, that speed up the convergence. The velocity of this top layer is then held constant, and another layer is added beneath...
2001
Abstract: Seismic Subsalt Imaging in a Complex Salt Basin; #90254 (2016)
Ricardo Bertolotti, Pedro Baptista, Alastair Beach, Radmila Tatalovic, John Aitken, Adnan O. Bu Fateem, Khalfan Almansoori
Search and Discovery.com
... of layered evaporites/sediments (fast and slow) and pure mobile halite (constant), which makes velocity estimation extremely difficult. State...
2016
Application of Advanced Depth Imaging Technology in Shallow Water Offshore Indonesia
Michael Gidding, Suyang Chen, Steven Wiseman, Moch Asrori, Richard Bolton
Indonesian Petroleum Association
... gradients.Grid based tomography is a robust, 3D ray-based inversion method used to refine velocity models for depth migration. Residual traveltime errors...
2012
An Interpreters Guide to Successful Prestack Depth Imaging; #41544 (2015)
Rob A. Holt
Search and Discovery.com
... velocity model building, then final migration and post-migration processing. Depth imaging, on the other hand, needs many passes of migration velocity model...
2015
Hydraulic Factors Controlling the Shape of Laminae in Laboratory Deltas
Alan V. Jopling
Journal of Sedimentary Research (SEPM)
... to eliminate the effect of this variable. Increase in velocity at constant depth of flow.--The relationship between velocity and depth of streamflow...
1965