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The AAPG/Datapages Combined Publications Database

Showing 2,652 Results. Searched 195,354 documents.

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Abstract: Trace Interpolation and Elevation Statics by Conjugate Gradients; #90172 (2014)

Marcus Wilson, Robert J. Ferguson

Search and Discovery.com

... to speed inversion. Conjugate Gradients The conjugate gradient method is an iterative algorithm used to approximate a solution x to a linear system Ax = b...

2014

Abstracts: Implicit Preconditioning for Least-squares Nonstationary Phase Shift; #90173 (2015)

Marcus R. Wilson and Robert J. Ferguson

Search and Discovery.com

... of the conjugate gradient method. AAPG Search and Discovery Article #90173 CSPG/CSEG/CWLS GeoConvention 2011, Calgary, Alberta, Canada, May 9-11, 2011 Non...

2015

Abstract: Upscaling of Reservoir Properties; #90224 (2015)

Evgeny Skripkin, Apostolos Kantzas, and Sergey Kryuchkov

Search and Discovery.com

... are constructed and a system of linear equations is obtained. Due to the sparce nature of the matrix of system conjugate gradient method is used as one...

2015

Abstracts: A Non-Linear Conjugate Gradient (CG) Method to Solve for Vp, Vs and Density from Seismic Elastic Impedance; #90173 (2015)

Yexin Liu and Zhuoheng Chen

Search and Discovery.com

...Abstracts: A Non-Linear Conjugate Gradient (CG) Method to Solve for Vp, Vs and Density from Seismic Elastic Impedance; #90173 (2015) Yexin Liu...

2015

Abstract: Full Waveform Inversion of Crosswell Seismic Data Using Automatic Differentiation; #90187 (2014)

Danping Cao and Wenyuan Liao

Search and Discovery.com

... method, which are widely used in solving the gradient-based optimization problem. The mostly used optimization methods include the conjugate-gradient...

2014

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

... by a strong velocity inversion at the top and two embedded velocity anomalies. The method starts from a velocity gradient as an initial model...

2023

ABSTRACT Crust Evolution During South Atlantic Rifting - Insights from Conjugate Structural Restoration Models, #90104 (2010)

Love Frank R.; Fraser Scot I.; Casey Katya E.; Reimann Kristan K.

Search and Discovery.com

...ABSTRACT Crust Evolution During South Atlantic Rifting - Insights from Conjugate Structural Restoration Models, #90104 (2010) Love Frank R.; Fraser...

2010

A deep learning-based inverse Hessian for full-waveform inversion

Mustafa Alfarhan, Matteo Ravasi, Tariq Alkhalifah

International Meeting for Applied Geoscience and Energy (IMAGE)

... is given by a scaled version of the negative of the gradient and the nonlinear conjugate-gradient method where the update is a combination...

2023

Abstract: A New Approach to Automated Well-Log Correlation in Three Dimensions: Examples from the Permian Basin, Texas;

Zoltan Sylvester

Search and Discovery.com

... of pairwise DTW correlations into a least-squares optimization problem that is solved through the conjugate gradient method. The resulting...

Unknown

Abstract: Stabilizing Seismic Absorption Compensation; #90171 (2013)

Changjun Zhang

Search and Discovery.com

... the problem using conjugate gradient method. Method Inverse problems can be approached from the point of view of probability theory (Tarantola, 1987...

2013

Abstract: Inexact Full Newton Method for Full Waveform Inversion Using Simultaneous Encoded Sources; #90187 (2014)

Amsalu Y. Anagaw and Mauricio D. Sacchi

Search and Discovery.com

... and full Newton can be implemented. The Newtonian methods generally converge faster than the gradient based nonlinear conjugate gradient method...

2014

Abstract: Improving the efficiency of the Forward Problem Solver for 3D resistivity modeling

Gregory Nash

Atlantic Geology

... right-hand sides. Because of the sparsity of A, current algorithms solve this problem efficiently using a conjugate gradient algorithm, which provides...

2007

Abstract: Parallel Implementation of Pre-stack Least-squares Migration for Distributed Systems; #90171 (2013)

Sam T. Kaplan

Search and Discovery.com

... for evaluating the forward, adjoint and least-squares inverse (using the conjugate gradient method). All run-times are given in minutes. Discussion We...

2013

Abstract: Conjugate Margin : An Exploration Strategy; #90174 (2014)

R.Borsato, J.Greenhalgh, M. Martin, Tom Ziegler, Paul Markwick, and Andy Quallington

Search and Discovery.com

...Abstract: Conjugate Margin : An Exploration Strategy; #90174 (2014) R.Borsato, J.Greenhalgh, M. Martin, Tom Ziegler, Paul Markwick, and Andy...

2014

Abstract: Geoelectric Response of the Crust and Upper Mantle, Lake Nipigon Area, Ontario; #90172 (2014)

Cassandra Tycholiz, Ian Ferguson

Search and Discovery.com

... in the Superior Province using a non-linear conjugate gradient inversion method. The resulting resistivity models show a number of significant resistivity...

2014

Diving wave tomography: Velocity modelling using first arrival traveltime

Amatul Syafi Abdul Basit, Abdul Rahim Md Arshad, Arulini Permalu

Geological Society of Malaysia (GSM)

... d(k) – the steepest-descent and the conjugate gradient method. The former being the simplest, oldest known numerical method for unconstrained...

2022

Abstract: Re-establishment of Gradient in Frequency-domain Elastic Waveform Inversion; #90174 (2014)

Ju-Won Oh, Dong-Joo Min, and Felix J. Herrmann

Search and Discovery.com

... that the weighting method enhances gradient images and inversion results compared to the conventional inversion algorithms. Introduction In the waveform...

2014

Frequency Gradient of Spectral Decomposition for Identifying Hydrocarbon Reservoir … Example from Indonesian Field

Abdul Haris, Ahsanul Khair

Indonesian Petroleum Association

...Frequency Gradient of Spectral Decomposition for Identifying Hydrocarbon Reservoir … Example from Indonesian Field Abdul Haris, Ahsanul Khair...

2012

Fault Detection From 3-D Seismic Data and Distribution of Conjugate Faults in the Bakken Formation

Ismot Jahan, John Castagna, Michael Murphy

Unconventional Resources Technology Conference (URTEC)

...Fault Detection From 3-D Seismic Data and Distribution of Conjugate Faults in the Bakken Formation Ismot Jahan, John Castagna, Michael Murphy...

2017

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