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Joint inversion of well‐log data
SEG Technical Program Expanded Abstracts 2009, 2009We consider the processing of well log data, in which the measurements taken at a reservoir level (fluid filled porous rock) give the properties of the compound medium. From a collection of noisy well log measurements, it is desired to estimate the parameters characterizing the formation, namely the porosity and the volume ratio of the individual fluid
MIOTTI, FABIO MARCO +2 more
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Joint Gaussian processes for inverse modeling
2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2017Solving inverse problems is central in geosciences and remote sensing. Very often a mechanistic physical model of the system exists that solves the forward problem. Inverting the implied radiative transfer model (RTM) equations numerically implies, however, challenging and computationally demanding problems.
Daniel Heestermans Svendsen +3 more
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A hybrid joint‐inversion scheme
SEG Technical Program Expanded Abstracts 2011, 2011s, 719–723. Backus, G. E., 1962, Long-wave elastic anisotropy produced by horizontal layering: Journal of Geophysical Research, 67, no. 11, 4427–4440, doi:10.1029/JZ067i011p04427. Chen, J., and T. A. Dickens, 2009, Effects of uncertainty in rock-physics models on reservoir parameter estimation using seismic amplitude variation with angle and controlled-
Charlie Jing +7 more
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Joint Inversion on Irregular Meshes
24th European Meeting of Environmental and Engineering Geophysics, 2018The design of structural coupling operators for joint inversion on irregular meshes is a non-trivial task. We propose to use a neighbourhood approach to calculate the model-gradients that are needed for the cross-gradients coupling constraints. Our joint inversion algorithm is applied to 3D synthetic crosshole GPR traveltime and apparent resistivity ...
C. Jordi +3 more
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Model Fusion and Joint Inversion
Surveys in Geophysics, 2013Inverse problems are inherently non-unique, and regularization is needed to obtain stable and reasonable solutions. The regularization adds information to the problem and determines which solution, out of the infinitely many, is obtained. In this paper, we review and discuss the case when a priori information exists in the form of either known ...
Eldad Haber, Michal Holtzman Gazit
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Joint inversion of the reflectivity and the velocity model
Geophysics, 2021ABSTRACT During linearized waveform inversion (LWI), the presence of small inaccuracies in the background subsurface model can lead to unfocused seismic events in the final image. The effect on the amplitude can mislead the interpretation.
Alejandro Cabrales-Vargas +3 more
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2022
<div> <p><span>The Earth crust represents less than 1% of the volume of our planet but is exceptionally important as it preserves the signs of the geological events that shaped our planet. This thin layer is the place where the natural resources we need can be accessed (e.g.&#160; critical raw materials,
Martina Capponi, Daniele Sampietro
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<div> <p><span>The Earth crust represents less than 1% of the volume of our planet but is exceptionally important as it preserves the signs of the geological events that shaped our planet. This thin layer is the place where the natural resources we need can be accessed (e.g.&#160; critical raw materials,
Martina Capponi, Daniele Sampietro
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Joint Impedance and Facies Inversion – Seismic inversion redefined
First Break, 2014In this paper we will first review the industry-standard simultaneous inversion method (which derives continuous impedances) and subsequently identify some pitfalls. We will then introduce our new Joint Impedance and Facies Inversion technology (which we call Ji-Fi for short in this paper), which overcomes these pitfalls by recasting the seismic ...
Michael Kemper, James Gunning
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Joint Inversion of Rock Properties – A Case Study
71st EAGE Conference and Exhibition incorporating SPE EUROPEC 2009, 2009Geophysical methods are used to obtain physical properties of the subsurface, by inverting the constitutive equations. If there exists a common set of rock properties (cross-properties) that influence different measurements, their joint utilization can ...
MIOTTI, FABIO MARCO +2 more
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Joint Inversion of Multiple Observations
2018Joint inversion becomes increasingly important with the availability of various types of measurements related to the same quantity. Questions arising in this context are how to combine the different data sets in the first place and, secondly, how to choose the multiple parameters that naturally occur in such a combination.
Christian Gerhards +2 more
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