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...

Robust localized adaptive waveform inversion: A new regularization for Gabor deconvolution

Peng Yong, Romain Brossier, Ludovic Mtivier

International Meeting for Applied Geoscience and Energy (IMAGE)

... enough, FWI would fail to generate geologically meaningful velocity models. Studies indicate that enhancing traveltime information in misfit design can...

Unlocking the Potential of Conventional Narrow Azimuth Data by Full-Waveform Inversion: a Deep Carbonate Imaging Case Study, Offshore Indonesia

Jun Wang, Yonghe Guo, Putri Supriandini, Bahrul Yusrie, Natalia Anggriani

Indonesian Petroleum Association

... sensible velocity updates down to 3.5 kilometers. These updates to the model improve the seismic image and, importantly, reduce the depth...

Results of Seismic Surveying with Surface Sources of Excitation in the Pripyat Depression

A. L. Kauzov, I. B. Krylov, A. I. Luginets, I. I. Rotfel’d

Petroleum Geology: A Digest of Russian Literature

... are becoming increasingly important. A comparison is made here of the geologic information displayed in time sections of common-depth-point surveying...

Joint inversion of first-arrivals with full waveform inversion: improving the near-surface model for depth imaging the Marcellus shale of Bradford County, PA

Search and Discovery.com

Gas hydrates characterization in the southern Hikurangi margin using full waveform inversion

Search and Discovery.com

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...

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...

A Modeling Study for Imaging in Structurally Complex Media: Case History

Hesham Moubarak

Search and Discovery.com

... parameters. The depth/velocity model was derived from a balanced geological section in North Eastern British Columbia foothill inferred from a 1998...

A Modeling Study for Imaging in Structurally Complex Media: Case History

Hesham Moubarak

Search and Discovery.com

... parameters. The depth/velocity model was derived from a balanced geological section in North Eastern British Columbia foothill inferred from a 1998...

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...

Benefits of selective stacking of windowed high-resolution linear radon transform (HRLRT) images from traffic-induced passive-seismic data with the multi-channel analysis of surface waves (MASW) method in Lawrence, Kansas

Julian Ivanov, Richard D. Miller, Dmitry Borisov, Shelby Peterie, Anthony M. Hoch

International Meeting for Applied Geoscience and Energy (IMAGE)

...Benefits of selective stacking of windowed high-resolution linear radon transform (HRLRT) images from traffic-induced passive-seismic data...

Abstract: A Comparison of Standard Migration with EOM for Hussar Data; #90174 (2014)

Thais A. Guirigay, John C. Bancroft, and J. Helen Isaac

Search and Discovery.com

... plot and therefore improve the resolution of velocity analysis over conventional common midpoint gathers. Introduction Migration is one of the most...

Geologic Framework of Lower Cook Inlet, Alaska

Michael A. Fisher, Leslie B. Magoon

AAPG Bulletin

... interpretation or correlation but can be used for approximate conversion of seismic traveltime to depth. Interval-velocity curves were computed at 21...

Induced seismicity hypocentral depth stability and sensitivity to Vp/Vs in the South Delaware Basin, West Texas

Alexandros Savvaidis, Anthony Lomax, Robin Dommisse, Caroline Breton, Matthew Shirley, Vincent OSullivan

International Meeting for Applied Geoscience and Energy (IMAGE)

... determinations. Depth determination is greatly complicated in the Delaware basin by the presence of the shallow, high seismic velocity, Ochoan salt...

Crustal Structure in Gulf of Mexico from OBS Refraction and Multichannel Reflection Data

A. K. Ibrahim, J. Carye, G. Latham, R. T. Buffler

AAPG Bulletin

... was obtained indirectly to give the correct depth of the OBS. Linear segments of traveltime curves were interpreted from the record section and fitted...

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...

VSP Fundamentals that Improve CDP Data Interpretation: ABSTRACT

J. E. Gaiser, J. P. Disiena

AAPG Bulletin

.... The areas covered are VSP acquisition, critical points of the processing sequence, and applications to borehole information in depth and CDP data in time...

Least-squares RTM with shifted total variation regularization for depth imaging of sparse short-offset seismic data

Toktam Zand, Andrzej Gorszczyk, Ali Gholami, Hasan Ghasemzadeh, Alison Malcolm

International Meeting for Applied Geoscience and Energy (IMAGE)

..., in order to account for multiples as signal rather than noise, we recursively update the migration velocity model in the frame of a non-linear migration...

Estimating Smectite Content from Seismic Data

Roman Beloborodov, Marina Pervukhina, Valeriya Shulakova, Dimitri Chagalov, Matthew Josh, Michael B. Clennell, Gavin Ward, Matthew Waugh, Juerg Hauser

Australian Petroleum Production & Exploration Association (APPEA) Journal

... at ~2.8 two-way traveltime in Fig. 3, where the smectite content decreases rapidly from 0.3 to 0.1. The depth of the transition corresponds...

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...

Abstract: Interferometric Assessment of Clamping Quality of Borehole Geophones; #90224 (2015)

Yoones Vaezi and Mirko van der Baan

Search and Discovery.com

... correlation functions can consequently be inverted for 2D and 3D velocity structures. Body waves may also be extracted from SI of closely-spaced receivers...

Considerations in Azimuthal Processing and Velocity Inversion for Unconventional Plays

Michael J. Perz, William Keller, Victor Kriechbaum

Unconventional Resources Technology Conference (URTEC)

... of lateral velocity heterogeneity and/or orthorhombic anisotropy may cause complex traveltime distortions (even at modest propagation angles) which...

Stop Treating Diffractions as Noise … Use them for Imaging of Fractures and Karst; #120057 (2012)

Mark Grasmueck, Tijmen Jan Moser, and Michael A. Pelissier

Search and Discovery.com

... discontinuities such as edges and corners. When intersecting two thin and flat open fractures the linear intersection causes tipwaves at both ends connected...

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...