Long-Offset Approximations to NMO Function for a Layered Subsurface

E. Blias

Search and Discovery.com

.... For long offsets (offset/depth § 1.5 – 2.5), we can expect significant improvement of VRMS estimation using three-term velocity analysis, even though...

Long-Offset Approximations to NMO Function for a Layered Subsurface

E. Blias

Search and Discovery.com

.... For long offsets (offset/depth § 1.5 – 2.5), we can expect significant improvement of VRMS estimation using three-term velocity analysis, even though...

Using Sonic and Resistivity Effective Medium Theories to Quantify the Influence of Rock Fabric on the Mechanical Properties of Organic Mudrocks

Paul Sayar, Carlos Torres-Verdín

Unconventional Resources Technology Conference (URTEC)

... of symmetry lies along the vertical x3 -axis. Velocities are functions c c 2  11 12  of the elastic properties and bulk density,  , of the rock...

Chapter 8: Evaluation of Anomalous Pressuring and Gas Saturation Using 2-D and 3-D Visualizations of Well Log Information

Zun S. Jiao, Ronald C. Surdam

Montana Geological Society

...") below the pressure boundary surface using one-, two-, and three-dimensional velocity modeling and visualizations of well log and seismic...

Where Is My Horizontal Well? Use of Borehole Seismic Where Velocities Vary Laterally

Agus Muharam, Frank Musgrove

Indonesian Petroleum Association

... arriving at high angle from vertical, and lack of control on velocity needed to migrate and depth convert the VSP data. Figure 2. Schematic cross section...

Three-Dimensional Depth Imaging of Seismic Data to Assess Subsurface Geology in Northern Utah and Southwestern Wyoming

Alvin K. Benson

Utah Geological Association

... of the data using stacking velocities, followed by conversion to depth, was attempted, but after numerous tries with a variety of stacking-velocity functions...

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...

Interpretative PSDM Workflow for Solving Complex Imagery Below Faults and Carbonates Reefs in South Mahakam, Kutai Basin: An Interpreters Point of View

Cepi Muhamad Adam, Nadir Abdoun, Bertrand Duquet, Florent Bertini, Yves Le Stunff

Indonesian Petroleum Association

.... Initial Velocity Model and Shallow Horizons Interpretation A first Kirchhoff depth migration was run using an initial smoothed velocity model derived...

Application of Seismic Surveying to Direct Exploration for Oil and Gas

A. M. Ivanchuk, L. F. Tarkhova

Petroleum Geology: A Digest of Russian Literature

...-bearing strata on attenuation and velocity of seismic waves. Field studies have shown that the decrease in velocity of propagation at pools reaches...

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)

...Sensitivity analysis of acoustic waveform inversion to velocity anomalies in the near-surface using the Frchet derivative Ao Cai, Colin A. Zelt...

Implications of Seismic Attribute Computations from Depth-Migrated Data; #41980 (2017)

Lilian Vargas-Meleza, Edgar Espinoza-Carrasco, Sergio Chávez-Pérez

Search and Discovery.com

... attributes are calculated from depth-migrated data. For instance, vertical sampling is no longer in milliseconds but in meters. Attribute calculations...

Value of conventional PS-wave velocity analyses for PSDM of deep-water OBS data

James Gaiser, James Simmons, Moacyr de Souza Bezerra

International Meeting for Applied Geoscience and Energy (IMAGE)

... be correlated. Although PS-waves have higher vertical resolution, significant depth errors are present. OBS velocity analyses Conventional hyperbolic...

Sedimentologic and Physical Oceanographic Evidence of a Shelf Edge Counter Current Off Guinea Bissau, Guinea and Sierra Leone

David W. McGrail

Journal of Sedimentary Research (SEPM)

... for the calculation of the Ekman number. Commonly, the scale of choice for E is a mean depth characterizing the area of interest. By using a horizontal scale...

Applications of Pre-Stack Migration; Richard Postma; Search and Discovery Article #40029 (2001)

Search and Discovery.com

Checkshots and Vertical Seismic Profiles: Part 7. Geophysical methods

B. A. Hardage

AAPG Special Volumes

... the areal and vertical distributions of reservoir and sealing units are measured as functions of seismic traveltime, not as functions of depth...

Importance of Good Time to Depth Conversion Method to Reduce GRV Uncertainties of Producing Fields in the South Sumatra Block, #20494 (2020).

Danar Yudhatama, Aurora Juniarti, Erwin Muhamad Indra Kusumah, Yudi Yanto,

Search and Discovery.com

... structure map that has a similar pattern with the time structure map. Time to depth conversion method that honors the lateral velocity variation is using...

Abstract: Reducing Fault-related Structural Uncertainties by Ranking Models using Seismic Data Misfit Functions; #90286 (2017)

Modeste Irakarama, Gabriel Godefroy, Paul Cupillard, Guillaume Caumon, Paul Sava

Search and Discovery.com

...Abstract: Reducing Fault-related Structural Uncertainties by Ranking Models using Seismic Data Misfit Functions; #90286 (2017) Modeste Irakarama...

Quantifying Velocity-Geology-Pressure Relationships in Core: The Foundations of a 4-D Seismic Feasibility Study in the Ichthys Gas-Condensate Field, NW Australia

Search and Discovery.com

Full-Waveform Inversion Application on 2D Slanted Streamer Data - A Case Study

Andreas Waluyo

Indonesian Petroleum Association

... calculated were depth variant. These functions were then extrapolated to the entire seismic line relative to the water bottom depth. The isotropic model...

The Application of Image Processing Techniques for Complex Structures

V. Sudhakar, I. T. McMahon

Indonesian Petroleum Association

... in interval velocity with depth, the DMO operator used is based either on a time-invariant or time-variant DMO algorithm. To some extent the velocity...

Sonic velocity, submarine canyons, and burial diagenesis in Oligocene-Holocene cool-water carbonates, Gippsland Basin, southeast Australia

Malcolm W. Wallace, Guy R. Holdgate, Jim Daniels, Stephen J. Gallagher, Andrew Smith

AAPG Bulletin

... surface for this region. Figure 11. The seismic line in Figure 10, converted to depth using the velocity model of Figure 10C. Dashed line at base...

Addressing the complex near-surface challenges in the Delaware basin through recent FWI advancements

Ali Mohamed, Dmitry Kulakov, Daniel Suren, Wilfrid Milan, Larry Holifield, Vasudhaven Sudhakar

International Meeting for Applied Geoscience and Energy (IMAGE)

...-velocity model updated using Refraction FWI demonstrated significant improvements in the consistency of imaging and accurate positioning of seismic...

Lateral Changes in Seismic Velocities and Their Effect on Depth Prediction

J. Pinchin, M. Bayly

Petroleum Exploration Society of Australia (PESA)

... Basins, is measurement of the vertical velocity profile. Seismic stacking velocities are generally accurate to only a few per cent, but by averaging...

Multilayer perceptron and Bayesian neural network based implicit elastic full-waveform inversion

Tianze Zhang, Jian Sun, Daniel O. Trad, Kristopher A. Innanen

International Meeting for Applied Geoscience and Energy (IMAGE)

...); surface-wave (SW) analysis and inversion techniques can be adopted to retrieve the S-wave velocity (Vs ) variations, using processing workflows based...

New Integrated Workflows for Improved Pore Pressure Prediction and Seismic Imaging, #41705 (2015).

Marek Kacewicz, Sankar Muhuri, Weihong Fei

Search and Discovery.com

... using petrophysics established Vertical Effective Stress – Velocity transforms. Step 1 is optional and depends on MEM availability. Based on our...