Winston Lewis
WesternGeco
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Winston Lewis.
Seg Technical Program Expanded Abstracts | 2010
Adriana Citlali Ramírez; Winston Lewis
Geophysical inverse problems are usually ill-posed and illconditioned, meaning that their solution is not unique and/or unstable. This kind of inverse problems can be solved using regularization techniques from optimization theory, where an additive or multiplicative regularizer will help obtain an automatic selection of a unique and stable solution for a given cost function. Regularization helps condition an inverse problem by providing the search for possible solutions with a priori information that comes from inferences about the physics of the problem. There is a toolbox of regularization techniques for inverse problems. Thus, it is necessary to assess the effect of different regularizers and different a priori information to select the best combination for the problem at hand. In this expanded abstract, we focus on regularization techniques aimed at stabilizing and improving the model estimated through full waveform inversion by adopting a two-step approach in light of the computational challenges posed by inverting for large 3D models.
Seg Technical Program Expanded Abstracts | 2012
Winston Lewis; Bill Starr; Denes Vigh
Geophysical Journal International | 2016
Bram Willemsen; Alison E. Malcolm; Winston Lewis
Geophysics | 2016
Denes Vigh; Kun Jiao; Xin Cheng; Dong Sun; Winston Lewis
Seg Technical Program Expanded Abstracts | 2016
Wei Dai; Winston Lewis; Kun Jiao; Richard T. Coates
Seg Technical Program Expanded Abstracts | 2016
Winston Lewis; Denes Vigh
Seg Technical Program Expanded Abstracts | 2015
Bram Willemsen; Winston Lewis; Alison E. Malcolm
Archive | 2012
Winston Lewis; Eugene William Starr; Jason Dressel
Seg Technical Program Expanded Abstracts | 2017
Winston Lewis; Denes Vigh
Seg Technical Program Expanded Abstracts | 2015
Denes Vigh; Winston Lewis; Chirag Parekh; Kun Jiao; Jerry Kapoor