Geological Input Valuable in Seismic Velocity Analysis, by Supratik Sarkar; #41118 (2013).

Search and Discovery.com

An Interpreter's Guide to Improvements in Depth Imaging through Model-Based Velocity Estimation and Refinement

Andy Furniss

Petroleum Exploration Society of Australia (PESA)

... Refinement The quality of a velocity model used for PSDM can be assessed by analysing the output common reflection point (CRP) gathers. For a given CRP...

Abstracts: Converted Wave Processing in the EOM Domain; #90173 (2015)

Thais A. Guirigay and John B. Bancroft

Search and Discovery.com

... and common scatter points (CSP). During the process, a converted wave velocity Vc was estimated from the hyperbolic moveout on CSP gathers. Moveout (MO...

4D image velocity scan to improve the 4D quantitative interpretation

Mohamed Hatab, Colin MacBeth

International Meeting for Applied Geoscience and Energy (IMAGE)

...), dip, and spatial coherency at each iteration. Common reflection point (CRP) output gathers on a 50 m x 50 m grid are used in a continuous locally...

An Interpreter's Guide to Improvements in Depth Imaging Through Model-Based Velocity Estimation and Refinement

Andy Furniss

Indonesian Petroleum Association

... domain. Velocity Model Refinement The quality of a velocity model used for PSDM can be assessed by analysing the output common reflection point (CRP...

ABSTRACT: Reverse Time Migration Using CRS Shot Gathers

Alfredo Caballero, Rodolfo Ballesteros, Eliakim Schuenemann, Ekkehard Tessmer, Humberto Salazar

GCAGS Transactions

...) technique was previously used for an enhancement of seismic prestack data, providing so-called CRS gathers with regularized common mid-point CMP and offset...

Beam Migration for Imaging of Complex Structures

Karl Schleicher, John Sherwood, Lynn Comeaux, Mazin Farouki

Indonesian Petroleum Association

... are then iterated until a satisfactory velocity model is developed for which the common reflection point depth gathers are adequately flat. The final...

Abstract: Maximize the Potential of Seismic Data in Shale Exploration and Production … Examples from the Barnett Shale and the Eagle Ford Shale; #90187 (2014)

Joanne Wang and Duane Dopkin

Search and Discovery.com

... orientation through anisotropic velocity analysis and azimuthal AVO technique. Geomechanical property generation requires input of reflection angle data...

Chapter 10-part 3: 3-D Depth Image Interpretation

William L. Abriel, Joseph P. Stefani, Robert D. Shank, David C. Bartel

AAPG Special Volumes

...). This allows subsurface reflection points (common reflection point: CRP) to add together when the earth velocity can be approximated by flat layers. However...

Investigation of DMO Algorithms during Test-Line Processing: Some Recommendations

Ng Tong San, Mohd. Hashim Abas, Leong Lap Sau

Geological Society of Malaysia (GSM)

... with dipping reflectors. Recapitulating, DMO can now be defined as a process that creates apparent common-reflection point gathers from common-midpoint...

FWI derived reflectivity gathers in angle domain

Hu Jin, Simon Luo, Qingqing Liao, Xukai Shen, Ganyuan Xia, Madhav Vyas

International Meeting for Applied Geoscience and Energy (IMAGE)

... velocity model, we perform higher-frequency FWI to update reflectivity gathers. We take residual data using all offsets and generate 5D gradients...

Anisotropic Pre-Stack Depth Migration in the Cusiana and Cupiagua Sur Fields

J. Checa, M. Mesa, N. Burke, J. Calderon, H. Alfonso, U. Egozi, B. Ver West, M. Yates

Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)

... to the simple initial RMS velocity field. Using this velocity field as an input, common image gathers were generated, and the flatness of the gathers was used...

Abstract: A Comparison of 3D Azimuth-Angle Domain Common Image Gathers using Poynting Vector and Optical Flow Methods; #90254 (2016)

Young Seo Kim, Constantine Tsingas

Search and Discovery.com

...Abstract: A Comparison of 3D Azimuth-Angle Domain Common Image Gathers using Poynting Vector and Optical Flow Methods; #90254 (2016) Young Seo Kim...

Forward Modeling to Improve Seismic Acquisition Design

Paula A.C. Barbosa, Jose A. Jaramillo, Jose H. Olaya

Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)

... of section A: Common Depth Point (CDP), Common Reflection Point (CRP), incidence angle, reflection amplitude, geometrical spreading factor and shot...

Abstract: Method for Analysis and Display of Elastic Synthetic Shot Gathers, by K. H. Wrolstad, F. Aminzadeh, and C. K. von Kahrs; #90992 (1993).

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Abstract: Accurate Conversion between Offset Image Gathers and Angle Image Gathers, by Jianming Sheng and Chengbin Peng; #90105 (2010)

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Shale Gas OVT Seismic Data Prestack Trace-Gather Optimization Technique

Yusheng Zhang, Gang Yu, Xing Liang, Benjing Liu, Guangming Hu

Unconventional Resources Technology Conference (URTEC)

... gathers. The common reflection point (CRP) gathers obtained from conventional azimuth processing will dim the real seismic response while seismic wave...

AVA attribute estimation from misaligned seismic gathers using U-Net

Ammar Ghanim, Ricard Durall, Norman Ettrich

International Meeting for Applied Geoscience and Energy (IMAGE)

...zed to introduce variability. Move-out correction is applied to prestack gathers using a perturbed velocity model, inducing NMO stretch and RMO effects on prim...

Velocity Analyses of Near Seafloor Strata Based on Multichannel Seismic Data from the Tonga Platform

Jeffrey E. Cole, Dennis M. Mann

Circum Pacific Council Publications

... for the correct stacking of common-depth-point (CDP) data and the production of true-depth sections. The seismic reflection data from the Tonga platform suggested...

Geoscience Integration and Interpretive Model Building to Overcome Seismic Imaging Problems in Foothills Environments; #41547 (2015)

Rob Vestrum

Search and Discovery.com

... gathers, we may use this display to quickly refine the velocity picks at a control point. Where we have low pre-stack signal, the image gathers...

Long Offset AVO in a Midcontinent Tight Gas Sand Reservoir

Pankhurst, Duane, Marfurt, Kurt, Sullivan, Charlotte

GCAGS Transactions

... the objective depth, providing an opportunity to evaluate prestack common reflection point (CRP) gathers at very long offsets. On stacked sections...

-- no title --

user1

Search and Discovery.com

... velocity in the shallow part and near-seabed areas may not be accurate. Similarly, the reflection events in common reflection point (CRP) gathers obtained...

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)

... high-resolution models. However, migration gathers are still needed for verifying the quality of the velocity model and for performing post-migration...

Simultaneous inversion of velocity and angle-dependent reflectivity

Nizar Chemingui, Yang Yang, Jaime Ramos-Martinez, Guanghui Huang, Dan Whitmore, Sean Crawley, Elena Klochikhina, Sriram Arasanipalai

International Meeting for Applied Geoscience and Energy (IMAGE)

... is crucial for AVA analysis. In our work, we expand on Yang et al.'s (2022) simultaneous inversion workflow, which updates velocity and stacked 3D...

Full-waveform inversion derived prestack reflectivity gathers

Jian Mao, Xin Cheng, Denes Vigh, James Xu, Qiaofeng Wu

International Meeting for Applied Geoscience and Energy (IMAGE)

... is extracted from the model. Using the pre-stack FWI pseudo-reflectivity gathers, we can then perform AVA/AVO analysis. Furthermore, some postprocessing can...