Computational Geosciences

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Finite element evaluation of diffusion and dispersion tensors in periodic porous media with advection
Computational Geosciences - Tập 11 - Trang 43-58 - 2007
P. Tardif d’Hamonville, A. Ern, L. Dormieux
This paper presents three-dimensional finite element simulations to evaluate diffusion and dispersion tensors in periodic porous media in the presence of an advective velocity field. These tensors are evaluated in the framework of the double-scale expansion technique. Two problems, a Newtonian flow and a vector-valued advection–diffusion equation, have to be sequentially solved at the pore scale. ...... hiện toàn bộ
Ensemble-based multi-scale history-matching using second-generation wavelet transform
Computational Geosciences - Tập 19 - Trang 999-1025 - 2015
Théophile Gentilhomme, Dean S. Oliver, Trond Mannseth, Guillaume Caumon, Rémi Moyen, Philippe Doyen
Ensemble-based optimization methods are of- ten efficiently applied to history-matching problems. Although satisfactory matches can be obtained, the updated realizations, affected by spurious correlations, generally fail to preserve prior information when using a small ensemble, even when localization is applied. In this work, we propose a multi-scale approach based on grid-adaptive second-generat...... hiện toàn bộ
Sketching the temperature history of geological samples: analyses of diffusion profiles using multilayer perceptrons
Computational Geosciences - Tập 21 - Trang 519-531 - 2017
Laura Donatella Campisi
A method using multilayer perceptrons for analysing diffusion profiles and sketching the temperature history of geological samples is explored. Users of this method can intuitively test and compare results thinking in terms of analytical solutions of the diffusion equation whilst the bulk of the work is made computationally. Being neither completely analytical nor numerical, the method is a hybrid...... hiện toàn bộ
Mathematical properties of the foam flow in porous media
Computational Geosciences - Tập 25 - Trang 515-527 - 2021
Luis F. Lozano, Rosmery Quispe Zavala, Grigori Chapiro
Foam is used in enhanced oil recovery to improve the sweep efficiency by controlling the gas mobility. A common way to describe the foam displacement is by using population balance models, which consider the foam texture as part of the gas phase. Numerical simulation of such equations presents serious difficulties connected to the high non-linearity in the fractional flow. The linear kinetic model...... hiện toàn bộ
A new method for the construction and optimization of quadrangular adaptive well pattern
Computational Geosciences - Tập 21 - Trang 499-518 - 2017
Kai Zhang, Hao Zhang, Liming Zhang, Ping Li, Xiaoming Zhang, Jun Yao
A proper well pattern will have considerable effects on the oil field production, with the ultimate recovery of hydrocarbon enhanced and the water production rate reduced. Comparing with triangular well pattern, quadrangular well pattern has more advantages in some cases and has broader application prospects. However, constructing an optimal quadrangular well pattern is more complicated and has no...... hiện toàn bộ
PorePy: an open-source software for simulation of multiphysics processes in fractured porous media
Computational Geosciences - Tập 25 - Trang 243-265 - 2020
Eirik Keilegavlen, Runar Berge, Alessio Fumagalli, Michele Starnoni, Ivar Stefansson, Jhabriel Varela, Inga Berre
Development of models and dedicated numerical methods for dynamics in fractured rocks is an active research field, with research moving towards increasingly advanced process couplings and complex fracture networks. The inclusion of coupled processes in simulation models is challenged by the high aspect ratio of the fractures, the complex geometry of fracture networks, and the crucial impact of pro...... hiện toàn bộ
Modeling of transport of first-order reaction networks in porous media using meshfree radial point collocation method
Computational Geosciences - Tập 23 - Trang 1369-1385 - 2019
Aatish Anshuman, T. I. Eldho
First-order reaction networks are often encountered in groundwater pollution problems. The members of the network transform/degrade from one species to another. In this paper a strong form meshfree numerical method named radial point collocation method (RPCM) is introduced to model such reactions. In the proposed method, the entire domain is decomposed into a number of overlapping local support do...... hiện toàn bộ
Efficient real-time reservoir management using adjoint-based optimal control and model updating
Computational Geosciences - Tập 10 Số 1 - Trang 3-36 - 2006
Pallav Sarma, Louis J. Durlofsky, Khalid Aziz, Wen H. Chen
Post-processing of sequential indicator simulation realizations for modeling geologic bodies
Computational Geosciences - - 2015
Jorge Kazuo Yamamoto, Paulo Milton Barbosa Landim, Antônio Tadashi Kikuda, Cláudio Benedito Baptista Leite, Santiago Díaz de Freijo López
Asymptotic Analysis and Layer Decomposition for the Couplex Exercise
Computational Geosciences - Tập 8 - Trang 149-162 - 2004
Stephane Del Pino, Olivier Pironneau
This document explores the possibilities of multiscale expansions and domain decomposition to solve part of the Couplex 1 exercise. We concentrate on the hydrostatic pressure and show that the slenderness of the domain and the large variations of the Darcy constants allows an analytical approximation which our test reveals to be true to relative errors smaller than 10−3. The numerical tests are do...... hiện toàn bộ
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