ABSTRACT: 2D/3D Modeling of the Pacific Lower Mantle Using S, SKS and SKKS Traveltimes and Amplitudes; #90113 (2010)

Yang Zhang and Jeroen Ritsema

Search and Discovery.com

... of the traveltime differences is detected between SKKS and SKS and between S and SKS. Combined, these observations suggest that S, SKS, and SKKS interact...

Application of Full Waveform Inversion to Resolve an Eroded Shallow Carbonate Platform, North Madura, East Java, Indonesia

David Cavalin, Nurrul Ismail, Tom Paten, Kola Agbebi, Dave Lim

Indonesian Petroleum Association

... frequencies of the recorded data to drive a more complex velocity model update technique: Full Waveform Inversion (FWI). Standard traveltime...

Hierarchical elastic velocities reconstruction with Eikonal-equation-based characteristic reflection traveltime tomography

Jianhua Wang, Jianming Zhang, Liangguo Dong, Yandong Wang

International Meeting for Applied Geoscience and Energy (IMAGE)

... converted waves. Raytracing is also necessary during iterative inversions to minimize the traveltime residuals and update the elastic velocity models...

Abstract: Raypath-Consistent Shear Wave Statics; #90224 (2015)

Raul Cova, David Henley, and Kris Innanen

Search and Discovery.com

... here. This expression may be used as the engine for an iterative non-linear inversion algorithm that will allow us to compute velocity models...

Multiple Suppression by the CRS Technique

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Time-Lapse Refraction Seismic I: A Complementary Monitoring Method?

Martin Landrø, Lasse Amundsen

GEO ExPro Magazine

... diving waves in a medium where the velocity increases linearly with depth. energy is sent back to the surface at the critical V0 = 2,000 m/s and two...

Strike Oriented, Swath Seismic and Its Potential Application to Exploration and Development in the Papuan Fold and Thrust Belt

William F. Robinson IV

Papua New Guinea (PNG) Petroleum Convention Proceedings

... velocity can be used to compute the ray length (also known as slant path depth). The orientation and length of the ray define the coordinates...

Sensitivity analysis of acoustic waveform inversion to velocity anomalies in the near-surface using the Frchet derivative

Ao Cai, Colin A. Zelt

International Meeting for Applied Geoscience and Energy (IMAGE)

... anomalies, whereas nonlinear traveltime tomography (TT) is known to be more sensitive to high velocity anomalies than low velocity anomalies because...

Analysis of the impact of demigration on traveltime-based reflection full-waveform inversion

Hong Liang, Houzhu (James) Zhang, Hongwei Liu

International Meeting for Applied Geoscience and Energy (IMAGE)

... provided by conventional FWI is usually limited to the penetration depth of diving waves and refractions. To resolve velocity update for deeper target...

Anisotropic full-azimuth velocity model building using joint reflection-refraction tomography

Matan Shustak, Itai Sharabi, Orly Kletenik-Edelman, Elive Menyoli, Ike Imala, Ronit Levy, Zvi Koren

International Meeting for Applied Geoscience and Energy (IMAGE)

... that this tomography can provide high-resolution anisotropic velocity models and subsequent accurate depth migration images. The method has been successfully applied...

Premigration attenuation analysis and mapping to image domain by weighted migrations

Yonghe Sun, Chunling Wu, Mark Fan, Zhemin Tan

International Meeting for Applied Geoscience and Energy (IMAGE)

... for spatially varying Q. The drawbacks of the approach include workflow complexity and spectral distortions by depth migrations. We propose picking...

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...

Abstract: Kirchhoff Prestack Time Migration with Angle Domain Common Image Gathers; #90174 (2014)

Jianhua Pan, Robert Tilson, Gerry Schlosser, and Elvis Floreani

Search and Discovery.com

... the traveltime relations with a constant background velocity. With a constant background velocity, source-rays and receiver-rays are straight...

Unlocking subsurface complexity: Sparse ocean-bottom node and full-waveform inversion for northern Green Canyon, Gulf of Mexico

Kate Glaccum, Denes Vigh, Yao Yu, Eray Kocel, Bing Bai, Di Chen, Hongyan Li, Kevin Lyons

International Meeting for Applied Geoscience and Energy (IMAGE)

... in the starting velocity model. The effective depth penetration of this model update needed to reach the full depth record for which imaging and earth model...

Fracture Estimation Using a P-Wave Azimuthal Attribute Analysis in the Cagüi Area: Abstract

Jorge Monsegny, Carlos Piedrahita

Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)

... amplitude, AVO gradient, velocity and traveltime. Each one of them shows azimuthal dependent variation which is evidence of a fracture induced anisotropic...

Abstract: Combining Geology and Prestack Seismic for Structural Model Building in the Gaspé Belt (Québec, Canada); #90211 (2015)

Anne Jardin, Martin Bêche, Karine Broto, Dave Saucier, and Donna Kirkwood

Search and Discovery.com

..., and of advanced pre-stack seismic techniques like pre-stack seismic interpretation, traveltime inversion and depth migration, can improve...

Elastic Wave Seismic Interpretation of Heavy-Oil Reservoirs

Search and Discovery.com

... processing have led to the more frequent use of VP/VS (P-wave velocity to S-wave velocity) ratios. Such analysis has enhanced our ability to characterize...

Abstract: Regular Grids Travel Time Calculation … Fast Marching with an Adaptive Stencils Approach; #90187 (2014)

Zhengsheng Yao, Mike Galbraith, and Randy Kolesar

Search and Discovery.com

... a fixed source in isotropic media, has the form ( ) ( ) Here x, and z are spatial coordinates, (1) is the traveltime (eikonal), and v is the velocity...

Influence of structure on Mississippian paleotopography and distribution of Middle Pennsylvanian sandstone reservoirs on the Cherokee platform, northern Oklahoma

Kevin J. Toth and James O. Puckette

AAPG Bulletin

... are in the southeastern part of the survey and surround the linear feature, which has higher two-way traveltime and a thicker interval than areas...

P-wave velocity inversion with average velocity analysis method

Yan Yuefeng, Jing Shaodong, Wang Yingwei, Zhong Chuhan

International Meeting for Applied Geoscience and Energy (IMAGE)

..., the application of P-wave velocity is more significant. It is shown that Poisson’s ratio is sensitive to the wavelength (W)/depth (D) relationship...

ABSTRACT: Reflection Seismology in Azimuthally Anisotropic Media, by Leon Thomsen; #91038 (2010)

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ABSTRACT: Multi Focusing Stack Technique for Subsurface Imaging; #90118 (2011)

Sunjay Sunjay

Search and Discovery.com

... that facilitates the estimation of a velocity model for depth imaging. For these reasons, improving the quality of time imaging is a focus of intensive...

Slope estimation of locally coherent events by polarization analysis of multi-component seismic data: Application to stereotomography for sparse node acquisition

Xiaole Zhou, Alessandra Ribodetti, Stephane Operto

International Meeting for Applied Geoscience and Energy (IMAGE)

...) for source at (4200m, 100m). Figure 1: Velocity model with a reflector at 1.5 km depth (blue line). Yellow line delineates source-receiver spread...

Abstract: Data Processing from a Single-Well Microseismic Monitoring in Western Canada Using a Newly Developed MATLAB Based Package (Camps); #90224 (2015)

Jubran Akram and David W. Eaton

Search and Discovery.com

... velocity model was calibrated with the recorded perforation shots using a non-linear optimization (pattern-search based) approach (Akram and Eaton...

Abstract: Target-Oriented Imaging for Continous Seismic Reservoir Monitoring; #90319 (2018)

Hongwei Liu, Mustafa Al-Ali

Search and Discovery.com

... use the NMO velocity defined at the target horizon to derive the initial operators. The principle of equal-traveltime affirms that the traveltimes...