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The AAPG/Datapages Combined Publications Database

Showing 1,097 Results. Searched 200,357 documents.

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Long-Offset Approximations to NMO Function for a Layered Subsurface

E. Blias

Search and Discovery.com

... is a zero-offset time, x is an offset and VRMS is an RMS velocity. Traveltime function t(x) can be expanded into exact series of x2. It was first done...

Unknown

Long-Offset Approximations to NMO Function for a Layered Subsurface

E. Blias

Search and Discovery.com

... is a zero-offset time, x is an offset and VRMS is an RMS velocity. Traveltime function t(x) can be expanded into exact series of x2. It was first done...

Unknown

Abstract: TTI Anisotropic Depth Migration: Which Tilt Estimate Should We Use?; #90211 (2015)

Francois Audebert and Volker Dirks

Search and Discovery.com

...-way traveltime along the normal ray, the apparent slowness (traveltime gradient) at the emergence point, and the apparent NMO velocity, Vnmo (related...

2015

Abstract: Salt Shape Tomography; #90254 (2016)

Patrice Guillaume, Olivier Hermant, Stanislaw Warzocha

Search and Discovery.com

... ray-based nonlinear slope tomography, we compute Fréchet derivatives made of traveltime derivatives with respect to the depth parameters describing...

2016

Abstract: Challenges of Microseismic Data Inversion in Case of Strong Anisotropy; #90255 (2017)

Sergey Yaskevich, Anton Duchkov, Georgiy Loginov, Alexandr Serdukov

Search and Discovery.com

.... The use of an isotropic model may lead to large disturbances in location quality and usually correspond to unreasonably large traveltime misfits...

2017

Abstract: Gas-Hydrates - A Major Future Fuel Of India; #90315 (2017)

Kalachand Sain

Search and Discovery.com

..., attenuation and instantaneous frequency have been computed to characterize the gas-hydrate reservoirs. Several approaches based on seismic traveltime...

2017

Abstract: Near Surface and Anisotropy Modeling Strategies for Fast-Track Land Depth Imaging; #90319 (2018)

Ernesto Sandoval-Curiel, Daniele Colombo

Search and Discovery.com

...-resolution helicopter-borne transient electromagnetic data was utilized to constrain seismic traveltime tomography through cross-gradient structural...

2018

Accelerated deep learning-based estimation of wavefront dips and curvatures and their application to 3D prestack data enhancement

Kirill Gadylshin, Ilya Silvestrov, Andrey Bakulin

International Meeting for Applied Geoscience and Energy (IMAGE)

... quality of the results. Introduction Kinematic wavefront attributes form a foundation of many seismic data processing methods. The first-order traveltime...

2022

Full Waveform Acoustic Logging: Part 7. Geophysical Methods

C. H. Cheng

AAPG Special Volumes

... (compressional) wave traveltime through the rock. ull waveform acoustic logs, however, provide a large amount of other information. This includes S (shear...

1992

Seismic Stratigraphy of Veracruz Tongue, Deep Southwestern Gulf of Mexico

Allen J. Bertagne

AAPG Bulletin

... 4(D), and Mexican Ridges folds to west. Vertical scale: two-way traveltime in seconds. Fig. 3. Segment of Line K5. Note chaotic wedge in sequence 4(C...

1984

Vp/Vs Ratio of a Heavy Oil Reservoir from Canada, #41598 (2015).

Carmen Dumitrescu, Larry Lines

Search and Discovery.com

... from traveltime (Figure 5), they both indicate the same anomalous areas, although the Vp/Vs values derived from inversion are generally lower than Vp/Vs...

2015

High-Resolution Anisotropic Earth Model Building on Conventional Seismic Data Using Full-Waveform Inversion: an Offshore Australia Case Study

Bee Jik Lim, Denes Vigh, Stephen Alwon, Saeeda Hydal, Martin Bayly, Chris Manuel, Dimitri Chagalov, Gary Hampson, Dimitri Bevc

Indonesian Petroleum Association

... incorporating the full two-way wave equation. FWI produces an accurate high resolution earth model by simultaneously using the information of traveltime...

2014

Basic Seismic Processing: Part 7. Geophysical Methods

Peter M. Duncan

AAPG Special Volumes

... related to shot and receiver positions on the surface of the earth, an elapsed time after the shot that originated the reflection or echo (traveltime...

1992

Phase-Ray Maslov Summation: A Complete Finite-Frequency Ray Method

Tianfei Zhu

Search and Discovery.com

.... ART has the advantage of simplicity in that a single ray is used to determine the traveltime and amplitude of a particular arrival. In assuming...

Unknown

Phase-Ray Maslov Summation: A Complete Finite-Frequency Ray Method

Tianfei Zhu

Search and Discovery.com

.... ART has the advantage of simplicity in that a single ray is used to determine the traveltime and amplitude of a particular arrival. In assuming...

Unknown

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...

2014

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)

... traveltime and the horizontal component of slowness vectors at sources and receivers. The horizontal component of the slowness vector at sources...

2024

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