Abstract: Regular Grids Travel Time Calculation … A Practical Huygens Wavefront Expansion Approach; #90187 (2014)

Zhengsheng Yao, Mike Galbraith, and Randy Kolesar

Search and Discovery.com

... solution to the eikonal equation formulated in a ray coordinate system. Because it shares the information between rays, unlike ray tracing where...

Seismic Anisotropy Modelling and Fluid Substitution for Carbon Dioxide (Co2) Well Storage Project In Carbonate Reservoir

Pebrian Tunggal Prakosa, Thariq Guntoro, Ahmat Dafit Hasim, Okok Wijaya, Yulia Putri Wulandari

Indonesian Petroleum Association

... between P-wave and S-wave velocity, which can be written: (eq.4) This empirical relationship became known as the mud rock equation or the “ARCO mud...

Land seismic multi-parameter FWI imaging

Mason Phillips, James McLeman, Vlada Avramovic, Tom Rayment, Stuart Schmitt, Mike Varner, Yasser Khalifeh, Ahmad Ammar Chahine, Eskil Jersing

International Meeting for Applied Geoscience and Energy (IMAGE)

... the workflow. In parallel with the preprocessing, an initial velocity model was built using refraction tomography in the near-surface and smoothed depth...

The Suitable Method in Generating True Depth Structure Maps to Eliminate Wonocolo Push-Down Effect on Seismic Data and Its Impact on Prospect Evaluation, North Madura Platform, East Java Basin

Haryono Haryanto, Rizki Krishna Pratama, Riaz Alai, M. Afiq B. Mokhtar, Pongga Wardaya, Yonghe Guo, Jun Wang

Indonesian Petroleum Association

... function method resulted depth structure maps with unsolved push-down effect artifact, as it is not respecting lateral variation of velocity. 3D paleo...

Abstract: Full Waveform Inversion with Phase Encoded Deconvolution Imaging Condition; #90224 (2015)

Wenyong Pan, Kris Innanen, and Gary Margrave

Search and Discovery.com

... of 30Hz. The ray parameter range used for linear phase encoding method is [-0.3s/km, 0.3s/km] with a step of 0.1s/km are tested for comparison. The lowest...

Impact of Pre-Stack Depth Migration on the Anama Prospect, Papuan Foreland Basin

K. Bradey

Papua New Guinea (PNG) Petroleum Convention Proceedings

... which uses ray tracing to avoid the lim itations of the Dix equation. However, stacking velocity analyses were performed at one-kilometre intervals...

Orthorhombic Imaging for Orthogonal Wide Azimuth Surveys in Mississippi Canyon, Gulf of Mexico; #30391 (2014)

Yang He, Adam Gersztenkorn, Sherry Yang, Bin Wang

Search and Discovery.com

... as a linear equation system to minimize the residual moveout of gathers for all azimuths. Checkshots’ travel times can be used by ray tracing...

Stabilizing two-term clock-drift inversion in ocean-bottom node processing

Beng Seong Ong, Zhaojun Liu, Carsten Udengaard

International Meeting for Applied Geoscience and Energy (IMAGE)

... for ocean-bottom nodes is usually modeled by two terms, a linear and a quadratic term. A global approach to invert for water velocity, node positions...

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user1

Search and Discovery.com

... migration involves continuously optimizing the velocity field in the depth domain to achieve accurate imaging. The accuracy of the shallow velocity model...

Streamlining subsurface insights: Single extrapolation for holistic Green's function generation

Hongwei Liu

International Meeting for Applied Geoscience and Energy (IMAGE)

... of migration velocity models. Traditionally, prestack depth migration (PSDM) based on ray-tracing-based Kirchhoff integration is predominantly employed...

Structure Interpretation Problems of a Lower Miocene Reef Associated with a Shallow Low Velocity Anomaly, North Sumatra

Peter Walker, Masrizal Maas, Michael D. Burnaman

Indonesian Petroleum Association

..., at the base reef level. These two phenomena, although unconnected are due to the ray path distortion caused by the presence of high velocity reef...

A Time Migration Before Stack

Richard Cooper, Malcolm Hobson

Geological Society of Malaysia (GSM)

... a more accurate velocity field for migration and depth conversion. The robust nature of the method allows its application to routine data processing...

Predicting S-wave sonic logs using machine learning with conventional logs for the Delaware Basin, Texas

Jaewook Lee, Yangkang Chen, Robin Dommisse, Alexandros Savvaidis, Guo-chin Dino Huang

International Meeting for Applied Geoscience and Energy (IMAGE)

... Velocity Prediction Figure 1. Bivariate correlation heatmap of five variables: S-wave sonic (DTS), P-wave sonic (DTC), gamma-ray (GR), density (ρ...

Three-Dimensional Trend Mapping Using Gamma-Ray Well Logs: Simpson Group, South-Central Kansas

J. H. Doveton , Zhu Ke-an , J. C. Davis

AAPG Bulletin

... 68 6. (June) Gamma-ray logs are useful indicators of shale content as a function of depth. When several gamma-ray logs are drawn from an area...

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

... is modified based on the following equation 𝑑𝑧 = (2) 𝑛𝑓 𝑑 Where 𝑓 𝑑 denotes the dominant frequency and 𝑣(𝑧) is velocity variation with depth...

-- no title --

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...

Improving total organic carbon estimation for unconventional shale reservoirs using Shapley value regression and deep machine learning methods

Jaewook Lee, David E. Lumley, and Un Young Lim

AAPG Bulletin

... correlated with the TOC logs, such as bulk density, P-wave velocity, and Poisson’s ratio. Second, we derive a multivariate linear regression model...

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

... particularly associated with shallow velocity anomalies. This methodology allowed us to confidently position in depth the potential plays and leads...

Depth Imaging „ Seeing the Invisible

Vetle Vinje

GEO ExPro Magazine

... Solving the wave equation Complexity of velocity model Computer efficiency Steep dips Model building Kirchhoff Migration Ray tracing Moderate...

Derivation of Seismic Depth Sections

H. Buchholtz, W. Houba

Geological Society of Malaysia (GSM)

.... Improved depth sections by combination of ray tracing and wave equation migration. Exploration Seminar, Cairo 1984 SCHNEIDER, J. and RIST, H., 1984. Depth...

Permeability prediction in chalks

M. Monzurul Alam, Ida Lykke Fabricius, Manika Prasad

AAPG Bulletin

..., doi:10.1144/1354-079306-707.Fabricius, I. L., L. Gommesen, A. Krogsboll, and D. Olsen, 2008, Chalk porosity and sonic velocity versus burial depth...

Abstract: Depth Velocity Model Optimization Using Beam Migration in a Mediterranean Field Offshore Egypt, by Ahmed El Bassiony, Bertrand Caselitz, Vira Matsourak, and Charles Zeltser; #90105 (2010)

Search and Discovery.com

An Alternative Interpretation of Linear Dipping Events on 2-D Seismic Data from the Wichita Mountains Frontal Zone: Abstract

Jan M. Dodson, Roger A. Young, Kevin J. Smart

Tulsa Geological Society

... Permian sediments and Precambrian basement to give rise to complex seismic ray paths. High-amplitude linear dipping events visible on this 2D seismic...

Abstract: Forward Modeling of Log Response in Geopressured Formations Reveals Valuable Insights to the Various Pore Pressure Prediction Techniques, by J. C. Rasmus; #90923 (1999)

Search and Discovery.com

Nonlinear LS-RTM based on the seismic scale separation and full-wavefield multiparameter FWI

ystein Korsmo, Yang Yang, Nizar Chemingui, Andrey Pankov, Antonio Castiello

International Meeting for Applied Geoscience and Energy (IMAGE)

.... FWI can as well incorporate reflections, which allow velocity estimation beyond the penetration depth of diving waves. For this to be feasible...