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The AAPG/Datapages Combined Publications Database

Showing 2,378 Results. Searched 187,797 documents.

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Abstract: Designing Wavefield Extrapolators using a Weighted Least-Squares with a Transition Band Approach; #90211 (2015)

Saleh Al-Saleh, John Bancroft, Gary Margrave

Search and Discovery.com

...Abstract: Designing Wavefield Extrapolators using a Weighted Least-Squares with a Transition Band Approach; #90211 (2015) Saleh Al-Saleh, John...

2015

Abstract: Enhancing the FOCI Algorithm by Using a Weighted Least-Squares Approach; #90211 (2015)

Saleh Al-Saleh and Gary Margrave

Search and Discovery.com

...Abstract: Enhancing the FOCI Algorithm by Using a Weighted Least-Squares Approach; #90211 (2015) Saleh Al-Saleh and Gary Margrave Datapages/Search...

2015

Algorithm Comparison with Cross Sections: Appendix A

David E. Hamilton, Thomas A. Jones

AAPG Special Volumes

.... ALGORITHMS TO BE COMPARED Five algorithms or methods of creating contour maps are compared here. The algorithms are weighted-average and least-squares...

1992

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

Marcus R. Wilson and Robert J. Ferguson

Search and Discovery.com

... on the phase shift method of Gazdag (1978). Acquired seismic data is extrapolated recursively through the near surface by weighted-damped least squares...

2015

Abstract: Antialiasing 5D Interpolation; #90187 (2014)

Stephen K. Chiu

Search and Discovery.com

... to constrain the least-squares inversion in MWNI, frequency by frequency, to overcome the aliasing artifacts. This new interpolation scheme expands...

2014

Abstract: Least Squares Pre-Stack Time Migration for Imaging and Reconstruction of Converted Waves; #90224 (2015)

Aaron Stanton

Search and Discovery.com

... these advantages we compare the least squares migration approach with Minimum Weighted Norm Interpolation (MWNI) for a synthetic data example where...

2015

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

Sam T. Kaplan

Search and Discovery.com

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

2013

Abstract: Statistical regression models for predicting landslide hazard

C. F. Chung

Atlantic Geology

... subareas are defined where each subarea contains a unique combination of the map patterns. Weighted least squares techniques are proposed...

1995

Difficult Lithologies: Part 4. Wireline Methods

Khaled Hashmy, Mark Alberty

AAPG Special Volumes

... these equations effectively for a solution. The more commonly used methods are -- Graphical crossplots -- Linear matrix solutions -- Weighted least squares...

1992

Extended Abstract: Multivariate Geostatistical Model for Groundwater Constituents in Texas

Dr. Faye Anderson

Houston Geological Society Bulletin

... allowed for the use of a covariance matrix. The model was validated with a split-sample. Estimates of iteratively re-weighted generalized least...

2016

ABSTRACT: Integration of Production and 4D Seismic Data for Improved Reservoir Characterization; #90017 (2003)

Mokhles Mezghani, Valerie Langlais, Mickaele Le Ravalec-Dupin, Frederic Roggero

Search and Discovery.com

... the minimization of a weighted least-squares objective function, which includes both production and 4D seismic data. The gradual deformation parameterization...

2003

Estimating the Line of Correlation

Norman Macleod, Peter Sadler

Special Publications of SEPM

... be modified to take key beds and weighted data into consideration Significance tests are available for least squares and major axis regressions...

1995

Abstract: Velocity Model Building with Weighted Linearized Inversion … A VSP Data Case Study; #90187 (2014)

Mingyu Zhang, Richard Kuzmiski, and Zhengsheng Yao

Search and Discovery.com

... first arrival data is contaminated by colored noise, conventional inversion that is based on least squares may not give the correct solution...

2014

Antialiasing 5D Interpolation; #41497 (2014)

Stephen K. Chiu

Search and Discovery.com

... – d||2 + μ xH F-1 |Pk |-2 F x, and the least-squares solution with a minimum weighted norm is: x’ = (THT + μ F-1 |Pk |-2 F)-1 THd, where: μ...

2014

Abstract: Data Interpolation by Angular Weighted MWNI; #90187 (2014)

Mark Ng and Dan Negut

Search and Discovery.com

... data, and (3) to interpolate aliased dips. Since MWNI does a least-squares data fitting in space one frequency at a time, it uses the result from...

2014

Hybridised Weighted Boot-Strap Differential Semblance

Hamish Wilson, Lutz Gross

Petroleum Exploration Society of Australia (PESA)

...; Fomel, 2007b; Liu et al., 2014; Chen et al., 2015) in which we obtain the local similarity through solving a least-squares problem with shaping...

2016

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

Marcus Wilson, Robert J. Ferguson

Search and Discovery.com

... is computed using an assumed velocity model and the wavefield at depth is derived using weighted damped least squares. This method is used to correct common...

2014

Modeling the Semivariogram: New Approach, Methods Comparison, and Simulation Study

A. Gribov, K. Krivoruchko, J. M. Ver Hoef

AAPG Special Volumes

... procedure using modified iterative weighted least squares is presented. This algorithm is shown to be reliable for a wide range of data types...

2006

Sparsity and Continuity Enhancing Seismic Imaging, #41532 (2015).

Peyman P. Moghaddam, Felix Herrmann, and Chris Stolk

Search and Discovery.com

..., Canada 2 Abstract A non-linear singularity-preserving solution to the least-squares seismic imaging problem with sparseness and continuity constraints...

2015

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