Finite-difference modeling of marine vibrator sources

Khalid Almuteri, Jeffrey Shragge, Paul Sava

International Meeting for Applied Geoscience and Energy (IMAGE)

... deformation as function of depth, and sz is the source depth. By introducing a depth-dependent horizontal deformation, we confine the timevarying mesh...

Fault Shadow Correction Methodology

P. Julien, J. L. Broyer, O. Bernet-Rollande

Indonesian Petroleum Association

... method. An initial 2D-depth model is built using dip seismic lines and a regional velocity function, which is then manually edited to remove...

Correlation of Acoustic Velocity, Stress, Rock Composition, Organic Matter and Rock Lamination in Organic-Rich Shales

Adel A. Alqahtani, Azra N. Tutuncu

Unconventional Resources Technology Conference (URTEC)

... et al. (1997) conducted a linear multivariate analysis resulting in a velocity-porosity-carbonate content transform that can help predicting...

Accurate Depth Conversions Reduce Risk

Larry C. Luton, Corine Prieto

GCAGS Transactions

... is not a new concept. The challenge lies in the proper selection of velocity data and model types that will generate accurate depth maps for evaluation...

Pre-Stack Imaging: Time or Depth? (Paper 25)

Carl Notfors, Peter Whiting, Geoff Mansfield

Geological Society of Malaysia (GSM)

... using a single v(z) velocity function. This approximation to the velocity field causes further inaccuracies in the prediction of the diffraction...

ABSTRACT: Incorporation of Geology, Wells, Rockphysics into Anisotropy Estimation for Seismic Depth Imaging Enables “True Earth Model”

Search and Discovery.com

Earth crustal analysis of Northwest Sabah region inferred from receiver function method

Abdul Halim Abdul Latiff, Faridah Othman

Geological Society of Malaysia (GSM)

.../s respectively as it hits the Moho boundary at 40 km depth. Keywords: Receiver function, crustal thickness, velocity structure, Kota Kinabalu INTRODUCTION Sabah...

Estimate near-surface velocity with reversals using deep learning and full-waveform inversion

Yong Ma, Xu Ji, Weiguang He, Tong Fei

International Meeting for Applied Geoscience and Energy (IMAGE)

...Estimate near-surface velocity with reversals using deep learning and full-waveform inversion Yong Ma, Xu Ji, Weiguang He, Tong Fei Estimate near...

Abstract: Efficency and Accuracy Enhancement for One-way Wave Equation Migration Through Improved Mapping Function in the Time-shift Imaging Condition; #90171 (2013)

Mark Ng

Search and Discovery.com

... depth steps using a suitable time lag mapping function. Last year, I proposed to use z 2β τ ( z) = ∫ dz = 2 β (z - z 1 ) / v ( x, z ), | z − z1 | < Δz...

Hybridised Weighted Boot-Strap Differential Semblance

Hamish Wilson, Lutz Gross

Petroleum Exploration Society of Australia (PESA)

... semblance with an embedded weighted function which accounted for sensitivity in velocity changes with offset. They were able to demonstrate improvements...

Modification to the Hardisty Equation, Regarding the Relationship Between Sediment Transport Rate and Particle Size

Ya Ping Wang , Shu Gao

Journal of Sedimentary Research (SEPM)

... discharge, flow depth, and width. Hence, it represents the cross-sectional mean or vertical mean current velocity, U. Because the water depth in the flume...

Three-dimensional joint inversion of seismic and gravity data using Gramian constraints and Gauss-Newton approach

Hao Zhu, Hongzhu Cai, Xinyu Wang, Ziang He, Lichao Liu, Xiong Xiong, Xiangyun Hu

International Meeting for Applied Geoscience and Energy (IMAGE)

... the velocity and residual density model vectors, respectively. In this scenario, the objective function for joint inversion can be formulated as follows...

2D Survey Earth Model Building and Depth Imaging Using 3D Grid-Based Tomography Technology

Eric Pearson, Suyang Chen

Indonesian Petroleum Association

... anisotropy model without well constraints using the final 3D velocity model for 2D anisotropic depth migration. This case study will describe...

A prior regularized 3D full-waveform inversion using 2D generative diffusion models

Fu Wang, Tariq Alkhalifah, Xinquan Huang

International Meeting for Applied Geoscience and Energy (IMAGE)

... velocity models), and convergence is slow. To address this challenge, we propose a novel prior regularized 3D FWI using 2D generative diffusion models...

Robust phase-driven time warping FWI for salt reconstruction

Guanghui Huang, Alejandro Alcudia-León, Jaime Ramos-Martínez, Nizar Chemingu

International Meeting for Applied Geoscience and Energy (IMAGE)

... We demonstrate the effectiveness of our algorithm using a controlled experiment. In Figures 1a and 1b, we show the true velocity and density models...

Estimation of anisotropic parameters from semblance picking using dynamic programming

Hong Liang, Houzhu (James) Zhang, Dongliang Zhang, Hongwei Liu, Xu Ji

International Meeting for Applied Geoscience and Energy (IMAGE)

... moveout corrected gather using 𝑉 as the stacking velocity (converted from depth domain to time domain) and 𝜂 = 0. The gather after correction is curved up...

Reveal The Velocity Anomalies in Complex Overburden and Enhanced The Imaging through Shallow Gas: A Case Study in SisiNubi Mahakam, Indonesia

Annas Astuti, Yohanes Kristomo, Bee Jik Lim, Ginanjar Satria, Natalia Anggriani

Indonesian Petroleum Association

... and reimaging the existing legacy data with Q prestack Kirchhoff depth migration performed in 2011 and 2014 did not accurately model the sharp velocity...

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)

... the depth of HF well laterals in the upper Wolfcamp, especially for Vp/Vs 1.73. Conclusions We have presented a procedure for using a modified velocity...

A dense linear array for passive seismic imaging of geothermal structural features: The FOAL experiment at Utah FORGE

Jaewoo Kim, Jonathan Ajo-Franklin, Tanner Shadoan, Valeriia Sobolevskaia, Julia Correa, Barry Freifeld

International Meeting for Applied Geoscience and Energy (IMAGE)

... the granite/alluvium interface, the most significant velocity contrast at the FORGE site, in a source-independent manner using the back-propagation...

Abstract: Geophysical Studies of the Deep Lithosphere Beneath Hudson Bay and Environs: Implications for Paleoproterozoic Assembly of Laurentia; #90172 (2014)

David W. Eaton, Meghan S. Miller, Fiona Darbyshire

Search and Discovery.com

... to about 300 km depth. Monte-Carlo modelling is used to estimate 1D shear wave velocity profiles for each of the dispersion curves. In general, the models...

Kronecker neural networks for the win: Overcoming spectral bias for PINN-based wavefield computation

Umair bin Waheed

International Meeting for Applied Geoscience and Energy (IMAGE)

... implement it using a feed-forward neural network with a composite activation function formed by using inverse tangent (atan), exponential linear unit...

Joint inversion of first-break and early-arrival wave for near surface imaging

Yiming Pan, Kai Zhang, Yipeng Xu, Hailin Wang, Ping Jiang

International Meeting for Applied Geoscience and Energy (IMAGE)

...-precision modeling. However, its objective function has a strong nonlinear relationship with the velocity disturbance, and the inversion results fall...

Settling Velocity and Grain Shape of Maërl Biogenic Gravel

Siddhi Joshi, Garret P. Duffy, Colin Brown

Journal of Sedimentary Research (SEPM)

... using microscopic image analysis confirm a strong positive linear relationship between grain roughness, quantified by the reciprocal of convexity...

Abstract: An Analysis of the Benefits of 3D Pre-Stack Time Migration (Paper 11)

Peter Whiting

Geological Society of Malaysia (GSM)

... time migration can be exactly removed after stack if the migration used was either constant or a single velocity function with depth. This inverse...

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...