Reflection or Refraction?

Aleksandr Nikitin, Nikolay Amelin, Sergei Pokrovskii, Andrey Lekomtsev

GEO ExPro Magazine

... in this method considerably reduce a reliable refracted wave velocity model up to 5.5 km depth. the total price of long-offset refracted wave seismic...

Pressure prediction using converted shear waves from OBN data: A rock physics approach

Prajnajyoti Mazumdar, Kevin Searles, Bjorn Olofsson, James Gaiser, Terence Krishnasami

International Meeting for Applied Geoscience and Energy (IMAGE)

..., and composition (vcl) affect seismic velocity and hence a need for estimation of vcl and C44 (or Vs) as a function of depth at seismic scale. Our method...

Prediction and Analysis of Geomechanical Properties of the Upper Bakken Shale Using Artificial Intelligence and Data Mining

George K. Parapuram, Mehdi Mokhtari, Jalel Ben Hmida

Unconventional Resources Technology Conference (URTEC)

... to simplify the calculation of shear wave velocity for the Upper Bakken Shale by just using compressional wave velocity. The linear calculation of shear...

Velocity Dispersion and Attenuation in Vibroseis Data

L. Flora Sun

Search and Discovery.com

... For example, frequency-independent Q (“constant Q”) is related to seismic velocity increasing linearly with log frequency (“linear dispersion”): V (Z ) 1 Z...

Velocity Dispersion and Attenuation in Vibroseis Data

L. Flora Sun

Search and Discovery.com

... For example, frequency-independent Q (“constant Q”) is related to seismic velocity increasing linearly with log frequency (“linear dispersion”): V (Z ) 1 Z...

Current Trends in Geophysics

H. E. Stommel, J. M. Graul

Indonesian Petroleum Association

... to the velocity function. This conventional depth section is shown at the lower left of the illustration. Western's scheme calls for the use of the time...

Permeability prediction in chalks

M. Monzurul Alam, Ida Lykke Fabricius, Manika Prasad

AAPG Bulletin

... relationships were replaced by relationships between velocity of elastic waves and permeability using laboratory data, and the relationships were then applied...

Seismic Modeling of Reservoir Heterogeneity Scales: An Application on Gas Hydrate Reservoirs

Search and Discovery.com

... autocorrelation function and a bimodal probability density function in the P-wave velocity logs from MITI Nankai Trough Post Survey well #1, Kamei et al. (2005...

Mapping Stratigraphic Traps with Seislog

Roy O. Lindseth

Indonesian Petroleum Association

... it should provide somewhat greater definition on the final product. Density is, to some degree, a linear function of velocity. If the velocity density...

Abstract: Near Surface Anomalies and Solutions; #90211 (2015)

Todd Mojesky, David LeMeur, and Ali Karagul

Search and Discovery.com

... Laidlaw, 1991, Simulated annealing statics computation using an order-based energy function: Geophysics, v. 56/11, p. 1831-1839...

Xu and White Revisited (Paper C8)

M. Sams, T. J. Focht, N. Azuairi Che Sidik

Geological Society of Malaysia (GSM)

... is replaced by the Hill average of the component minerals. The aspect ratio at each depth is adjusted until the modelled velocity matches the measured...

Study of the Seismic Attenuation Generated by the Mud Layer in Lake Maracaibo, Venezuela

J. Perez, E. Andara, B. Malave

Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)

... for this area, together with the densities and depth of the different reflectors that are observed in the raw data, see Figure 1. The velocity function...

Leveraging Reflection, Refraction, and Multiple Arrivals from Dual-Sensor Streamer Data for High-Fidelity Velocity Model Building and Imaging

G. Rønholt, J.E. Lie, Ø. Korsmo, B. Danielsen, S. Brown, S. Brandsberg-Dahl, A.V. Mavilio, N. Chemingui, D. Whitmore, M. Farouki

Indonesian Petroleum Association

... inversion (FWI) and separated wavefield imaging (SWIM) for prestack depth migration (PSDM) velocity model building and imaging. The data under...

Abstract: Near-surface Velocity Modeling through a Computationally Efficient Implementation of 1.5D Laplace-Fourier Full Waveform Inversion; #91204 (2023)

Apostolos Kontakis, Diego Rovetta, Daniele Colombo, Ernesto Sandoval-Curiel

Search and Discovery.com

... information in the inversion process. The objective function is minimized by a nonlinear conjugate gradients, producing a single 1D velocity model per...

Transformation of Resistivity to Pseudovelocity Logs

Albert J. Rudman , Joseph F. Whaley , Robert F. Blakely , Maurice E. Biggs

AAPG Bulletin

...., 1951, Seismic velocity as a function of depth and geologic time: Geophysics, v. 16, p. 192-206. End_Page 1164------------------------------ Faust...

The Relationship Between the Compressional Wave Velocity of Saturated Porous Carbonate Rocks and Density: Theory and Application

Search and Discovery.com

Abstracts: Evidence of Shallow Gas in the Queen Charlotte Basin from Waveform Tomography of Seismic Reflection Data; #90173 (2015)

Eric M. Takam Takougang and Andrew J. Calvert

Search and Discovery.com

... and perturbation velocity models derived from the inversion are displayed in Figure 2. The maximum depth of penetration is limited to 1.2 km due...

Abstract: Permeability Estimation Using a Neural Network: A Case Study from the Roberts Unit, Wasson field, Yoakum County, Texas, by D. A. Osborne; #91018 (1992).

Search and Discovery.com

Abstract: Application of a Tomographic Velocity Model to the Prestack Depth Migration of a Buried Valley; #90172 (2014)

Oluwafemi Ogunsuyi, Douglas R. Schmitt

Search and Discovery.com

... of a tomographic velocity model, the reprocessing of the reflection seismic and its corresponding depth migration using velocities derived from the traveltime...

A Breakthrough of Bekapai Converted S-Wave Processing and its Positive Impact to Structural Interpretation

Effendy Siawira, Andy Kristianto, Jaques Bonnafe, Natalia Anggriani, Cepi M. Adam, Zainal Abidin, Firman B. Kurniawan, Supriady, Claudio Strobbia, Yang Liu, Youning Li, Xiagui Miao, Libo Zi, Guishui Wang

Indonesian Petroleum Association

... by using a known P-wave velocity model to build a S-wave velocity model and update anisotropic parameters for PS wave depth migration. P-wave depth...

Abstract: Biot-Gassmann Fluid Term Extraction Based on PP-PS Joint Inversion;

Qi Ma

Search and Discovery.com

... of generalized linear inversion and the iterative reweighed least-squares algorithm are applied to solve this function. Tests with synthetic data show...

Basin-Scale Rock Physics Study and Stochastic AVO Modelling for the Deep Water Kutei Basin (East Kalimantan … Indonesia)

Gabriela Carrasquero, Alessandro Amato del Monte, Fabio Luoni, Paolo Battini, Gilbert Del Molino, Fabri Ikhlas Gumulya, Dedy Sulistiyo Purnomo, Nasif Khifni

Indonesian Petroleum Association

...). The statistical relationship used to establish the variation of velocity and density with depth was linear, given that it represents a simple yet...

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...

ABSTRACT: Analysis of Moho Depth and Crustal Vp/Vs Ratios in the Western U.S.; #90113 (2010)

Kristopher A. Castille and Harold Gurrola

Search and Discovery.com

... The purpose of this study is to analyze the Mohorovičić discontinuity, commonly referred to as the Moho, using seismic receiver function analysis...

Fault Shadow Issues and Resolution in Model and Real Data

Andrew J. Davidoff, Ika Ratna Novianti

Indonesian Petroleum Association

... in depth. The velocity model was built using the layer-by-layer depth interval velocity modeling technique and iterative Pre-SDM. Applying the more...