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Keywords: geophysical inversion
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Proceedings Papers

Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 28–September 1, 2022
Paper Number: SEG-2022-3746882
... Geophysical inversions require the inclusion of prior geological information. Many types of prior information are implicit or conceptual in nature. For instance, the information about the features in the subsurface geology is embedded in the multiple geophysical data sets, but not directly...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583288
... With the development of intelligent inversion technology, deep learning method has been successfully applied in geophysical inversion. Unlike the traditional neural network, this study uses the U-Net structure based on fully convolutional networks (FCN) to invert the physical properties...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3594761
... Recovering geologically realistic physical property models by geophysical inversion is a long-standing challenge. Generative neural networks offer a promising path to meeting this challenge because they can produce spatially complex models that exhibit the characteristics of a set of training...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3594791
...Understanding the recoverability of physical property relationships from geophysical inversions of multiple potential-field datasets Xinyan Li* and Jiajia Sun, Department of Earth and Atmospheric Sciences, University of Houston Summary representations of the subsurface geologic units. In previous...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583565
... We present a general scheme for 3D geophysical inversion using a deep learning convolutional neural network that enables three-dimensional inversions of useful size to be solved on laptops and desktops. A priori constraints of maximum smoothness or compactness on model parameters used during...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583615
...Implementing geological rules within geophysical inversion: A PGI perspective Thibaut Astic , Douglas W. Oldenburg, and Lindsey J. Heagy Geophysical Inversion Facility, Department of Earth, Ocean and Atmospheric Sciences, The University of British Columbia SUMMARY known geological contacts identi...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3586552
... Geophysical inversion has been recognized as a useful tool to interpret measurements in many geoscientific applications. However, analyzing uncertainty for inversions is still an open question and has been challenging so far, especially for regional scale 3D inversions. The goal of our work...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3584203
... We present results on the geophysical inversion of geobodies in a Bayesian framework. Although the methodology applies to all near-homogeneous geobodies, we focus on salt diapirs as they are known to create trapping mechanisms for hydrocarbon reservoirs. Despite a great interest shown...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216566
... ABSTRACT Geophysical inversion and machine learning both provide solutions of inverse problems in which we estimate model parameters from observations. In this study, we compare geophysical inversion and machine learning approaches in an aspect of solving inverse problems and show similarities...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215139
... geophysical inversion annual meeting annual international meeting semi quantitative approach electromagnetic field data inversion reservoir characterization hydraulic fracture geometry fracture geometry upstream oil & gas proppant electrical conductivity complex reservoir hydraulic fracturing...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2995155
... ABSTRACT Geophysical inversions are an essential tool for mapping the subsurface. However, the image of the underground retrieved from an inversion rarely benefits from the full range of knowledge. Geologic knowledge concerning petrophysical relationships and geologic features are not easily...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13863735
... ABSTRACT The interpretation of geophysical inversions in areas with little geologic information is not straightforward. To reduce the impact of subjective interpretation, we present the results of applying automatic clustering to identify mineralization in an iron oxide copper gold (IOCG...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13945549
... introduce and test a workflow that integrates petrophysical constraints and geological data in geophysical inversion in order to decrease the effect of non-uniqueness and to improve imaging. This workflow uses petrophysical measurements to constrain the values retrieved by geophysical inversion. Geological...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5928819
... such as electrical conductivity, chargeability, and magnetic susceptibility, which provide the potential for lithology differentiation and direct identification of ore bodies through geophysical inversions. This work shows the results of modeling and interpretation of magnetic and resistivity of an IOCG deposit...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5930227
... deposit inversion physical property value petrophysical knowledge bathurst mining camp geophysical inversion structural geology petrophysical data machine learning susceptibility value reservoir characterization petrophysical information mafic intrusion gravity petrophysics...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5831164
... the initial model is far from it. Moreover, deterministic inversion is band limited. Thus, global minimization methods are preferred in such problems (Sen and Stoffa, 2013; Menke, 2012). Because the model space in a typical geophysical inversion problem is very large, the grid search algorithm...
Proceedings Papers

Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-1598
... a priori structural surfaces. We discuss the forward modeling algorithm, discretization of the model objective function, and illustrate the performance using a synthetic salt example. farquharson geophysical inversion gravity data reservoir characterization triangular facet constraint...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-1163
... SUMMARY Geophysicists have long recognized the importance of constraining geophysical inversions with independent information from geology such as petrophysical information available from well logging or laboratory measurements. However, the ability of effectively utilizing such information...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-0715
... SUMMARY To be reliable, Earth models used for mineral exploration, or other subsurface investigations, should be consistent with all available geological and geophysical information. Geophysical inversion provides the means to integrate geological data such as lithology and structure, physical...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-0716
... rock unit optimization problem inversion polina zheglova representation evolutionary algorithm regularization triangle contact surface reservoir characterization farquharson wireframe surface particle swarm optimization interface geophysical inversion memorial university...

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