Extended Abstract: Advances and Challenges in Seismic Data Processing and Imaging for Geologically Complex Areas

Ruben D. Martinez

GCAGS Transactions

... velocity model building and depth migration algorithms could not possibly deliver useful seismic depth images for structural interpretation...

Amplitude and Bandwidth Recovery Beneath Gas Zones Using Kirchhoff Prestack Depth Q-Migration

Jonathan Liu, Peter Traynin, J. M. Reilly

Indonesian Petroleum Association

... Kirchhoff Prestack Depth Q-migration is efficient computation of traveltimes and amplitudes. Let c(x) be a complex velocity in a viscoacoustic medium...

Azimuthal Velocity Analysis of 3-D Pre-Stack Seismic Data for Fracture-Induced Anisotropy in the Altamont-Bluebell Field

Khaled Al Dulaijan, Gary Margrave

Unconventional Resources Technology Conference (URTEC)

...ffset two-way traveltime, x is the offset, ܸ௙௔௦௧ and ܸ௦௟௢௪ are the fast and slow NMO velocities respectively, ߚ௦ is the azimuth of the slow NMO velocity...

Mapping with Two-Dimensional Seismic Data: Part 7. Geophysical Methods

I. R. Gordon

AAPG Special Volumes

... a time map and a depth map. During conversion from time to depth, a velocity gradient map compensates for lateral changes in velocity, which is preferable...

Abstracts: Determining Elastic Constants of an Orthorhombic Material by Physical Seismic Modeling; #90173 (2015)

Faranak Mahmoudian, Gary F. Margrave, P. F. Daley, and Joe Wong

Search and Discovery.com

... of Calgary. Theory The linear expression for P phase velocity in geophysics discipline comes from the work of Backus (1965) as:  v 2  n   cijkl ni...

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Ehsan, Athar

Search and Discovery.com

... and stratigraphic features. From the dispersion relation, grid sizes adapted to local velocity with depth, which not only simulated wavefields with higher...

Abstract: 3D Time Domain Full Waveform Inversion Based on Multiscale Adapted Variable Grid Method Case Study Majunga Basin East African Coast; #91204 (2023)

Mukiibi Ssewannyaga Ivan, Jian-Ping Huang, Zi-Ying Wang, Jidong Yang, Jin Keji

Search and Discovery.com

... velocity with depth, which not only simulated wavefields with higher accuracy but also accelerated the calculation during the implementation of FWI. Our...

ABSTRACT: Seismic Properties and Modeling of an Early Aalenian Salt(?) Layer in Baltimore Canyon Trough, Offshore New Jersey, by Ann B. Swift, Myung W. Lee, C. Wylie Poag, Warren F. Agena; #91003 (1990).

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An Inverse Approach for Relating Seismic Velocity and Overpressure to Permeability and Sedimentation History in Deep Basins, #40863 (2012)

Hector M. Moreno, Tim A. Minshull, Rosemary A. Edwards,

Search and Discovery.com

... evolution with depth and an empirical law for the permeability as a function of porosity. Model output has been used to estimate the P wave velocity...

Abstracts: The Conventional and Non-conventional Seismic Differencing; #90173 (2015)

Vanja Vracar and Robert J. Ferguson

Search and Discovery.com

... modelling Stoffa et al. (1990) introduce the SSF migration algorithm, which handles lateral changes in velocity at each depth level taking dipping...

Subsurface temperature from seismic reflections: Application to the post-breakup sequence offshore Namibia

Arka Dyuti Sarkar and Mads Huuse

AAPG Bulletin

...., 2000). For there to be a linear relationship between acoustic velocity and thermal conductivity conditions, downhole must be conductive, steady state...

Abstract: Structure of Earths Shallow Outer Core: No Evidence for Stratification; #90172 (2014)

Catherine Alexandrakis, David W. Eaton

Search and Discovery.com

... of the outermost core velocity structure have been hampered by traveltime uncertainties due to lowermost mantle heterogeneities (Souriau and Poupinet, 1991...

Recent Advances in the Characterization of Unconventional Reservoirs with Wide-Azimuth Seismic Data

Ran Bachrach, Colin M. Sayers, Sagnik Dasgupta, Josimar Silva, Stefano Volterrani

Unconventional Resources Technology Conference (URTEC)

... thickness is approximately 60 ft. Azimuthal velocity anisotropy analysis was performed on the densely sampled 3D data. The data were depth migrated...

Improvement of Seismic Tomographic Imaging by Downward Continuation and Modified SIRT

Teuku A. Sanny, D. Santoso, D. Dahrin, Fatkhan, Alfian B.

Indonesian Petroleum Association

... of the direct arrival traveltime tomography. But the tomography image fails when applied in an area that has a Low Velocity Layer (LVL) in the top of objective...

Frequency-Domain Waveform Tomography in the Foothills: Velocity Model Estimation with Synthetic Long-Offset Data

Search and Discovery.com

.... Depth imaging is often necessary, and an accurate estimation of the macro-velocity model is essential. Waveform Tomography (i.e., traveltime...

The Application of 2D Common-Offset Common-Reflection-Surface (CO CRS) Stack Method Towards Synthetic Data

Parapaty Halley, Rachmat Sule, Teuku Abdullah Sanny

Indonesian Petroleum Association

.... The third and fourth layers are sediment beds which are more compact, showing increased P-wave velocity along their depth. The modeling used...

Imaging below Seafloor Canyons and other Rugose Features

Dominic Fell, Kiran Dyal, Tony Hallam, Sebastian Nixon

Australian Petroleum Production & Exploration Association (APPEA) Journal

... of velocity related structural distortions. Keywords: depth imaging, depth migration, earth model building, seafloor topography, tomography. Accepted...

Abstract: Imaging Sub-Volcanic Sediments From Wide-Angle Seismic Data In Selected Basins Of India; #90315 (2017)

Kalachand Sain

Search and Discovery.com

... provided a solution to this challenge by wide-angle seismic experiment, and delineated large-wavelength velocity structure in the Kutch, Saurashtra...

Joint 4D full-waveform inversion using enhanced template-matching objective function

Gaurav Dutta, Emmanuel Saragoussi, Xin Cheng, Markos Sourial, Yongbo Zhai, Chirag Parekh, Denes Vigh

International Meeting for Applied Geoscience and Energy (IMAGE)

... of the 4D difference got distorted after alignment. Figure 4: (a) 4D RTM image using a common velocity model and without any alignment. (b) Calculated depth...

Abstract: Scanning Anisotropy Parameters in Inhomogeneous Media, by Tariq A. Alkhalifah; #90105 (2010)

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Abstract: Determining the Structure of Basalt Flows with Wide-Angle Seismic Data, by M. M. Fliedner, R. S. White, and J. Fruehn; #90923 (1999)

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Cross-Borehole Tomography in Development Geology: Part 7. Geophysical Methods

J. H. Justice, M. E. Mathisen, J. R. Bulau, A. A. Vassiliou

AAPG Special Volumes

... and receivers for a typical survey are shown in Figure 2. These traveltime data are then used to infer the seismic velocity field between the wellbores. f...

Study of Sub-Salt Sediments in the Bayram-Ali Gas Region

V. A. Teplitskiy, I. P. Belozerov, B. M. Geyman, V. P. Lupanosov

Petroleum Geology: A Digest of Russian Literature

... observations combined with common depth point measurements at the surface were used. This program was successful. The upper boundaries within the sandy...

A Dynamic Reflection Traveltime Calculation Method

Y. Wang, D.R. Schmitt

CSPG Special Publications

...A Dynamic Reflection Traveltime Calculation Method Y. Wang, D.R. Schmitt 1994 49 50...

Structure of the Gudauta Bank According to Reconnaissance Seismic Investigations

Yu. P. Neprochnov, V. N. Moskalenko

Petroleum Geology: A Digest of Russian Literature

... of average velocity in the covering unit of V ¯ = 2.08 kmps was used; this was determined from the point of intersection of the traveltime curves...