document

EARLINET instrument intercomparison campaigns: Overview on strategy and results

Wandinger, U. (author), Freudenthaler, V. (author), Baars, H. (author), Amodeo, A. (author), Engelmann, R. (author), Mattis, I. (author), Gross, S. (author), Pappalardo, G. (author), Giunta, G. (author), D'Amico, G. (author), Chaikovsky, A. (author), Osipenko, F. (author), Slesar, A. (author), Nicolae, D. (author), Belegante, L. (author), Talianu, C. (author), Serikov, I. (author), Linne, H. (author), Jansen, F. (author), Apituley, A. (author), Wilson, K.M. (author), de Graaf, M. (author), Trickl, T. (author), Giehl, H. (author), Adam, D. (author), Comeron, A. (author), Munoz-Porcar, C. (author), Rocadenbosch, F. (author), Sicard, M. (author), Tomas, S. (author), de Lange, D. (author), Kumar, D. (author), Pujadas, M. (author), Molero, F. (author), Fernandez, A.F. (author), Alados-Arboledas, L. (author), Bravo-Aranda, J.A. (author), Navas-Guzman, F. (author), Guerrero-Rascado, J.L. (author), Granados-Munoz, M.J. (author), Preissler, J. (author), Wagner, F. (author), Gausa, M. (author), Grigorov, I. (author), Stoyanov, D. (author), Iarlori, M. (author), Rizi, V. (author), Spinelli, N. (author), Boselli, A. (author), Wang, X. (author), lo Feudo, F. (author), Perrone, M.R. (author), de Tomasi, F. (author), Burlizzi, P. (author)

This paper introduces the recent European Aerosol Research Lidar Network (EARLINET) quality-assurance efforts at instrument level. Within two dedicated campaigns and five single-site intercomparison activities, 21 EARLINET systems from 18 EARLINET stations were intercompared between 2009 and 2013. A comprehensive strategy for campaign setup and...

journal article 2016

document

Use of reduced-order models in well control optimization

Jansen, J.D. (author), Durlofsky, L.J. (author)

Many aspects of reservoir management can be expected to benefit from the application of computational optimization procedures. The focus of this review paper is on well control optimization, which entails the determination of well settings, such as flow rates or bottom hole pressures, that maximize a particular objective function. As is the case...

journal article 2016

document

An improved multiscale method for life-cycle production optimization

Oliveira, D.F.B. (author), Reynolds, A.C. (author), Jansen, J.D. (author)

journal article 2015

document

Challenges in adjoint-based well location optimization when using well models

Ashoori, E. (author), Jansen, J.D. (author)

There is a general consensus that the most efficient method for large-scale well location optimization is gradient-based with gradients computed with an adjoint formulation. Handels et al. (2007) (later published in journal form as Zandvliet et al., 2008), were the first to use the adjoint method for well placement optimization for which they...

report 2015

document

Value of information in closed-loop reservoir management

Barros, E.G.D. (author), Van den Hof, P.M.J. (author), Jansen, J.D. (author)

This paper proposes a new methodology to perform value of information (VOI) analysis within a closed-loop reservoir management (CLRM) framework. The workflow combines tools such as robust optimization and history matching in an environment of uncertainty characterization. The approach is illustrated with two simple examples: an analytical...

journal article 2015

document

Discerning in situ performance of an eor agent in the midst of geological uncertainty

Fatemi, S.A. (author), Jansen, J.D. (author), Rossen, W.R. (author)

An enhanced-oil-recovery pilot test has multiple goals, among them to verify the properties of the EOR agent in situ. Given the complexity of EOR processes and the inherent uncertainty in the reservoir description, it is a challenge to discern the properties of the EOR agent in situ. We present a simple case study to illustrate this challenge: a...

conference paper 2015

document

The egg model - A geological ensemble for reservoir simulation

Jansen, J.D. (author), Fonseca, R.M. (author), Kahrobaei, S. (author), Siraj, M.M. (author), Van Essen, G.M. (author), Van den Hof, P.M.J. (author)

The ‘Egg Model’ is a synthetic reservoir model consisting of an ensemble of 101 relatively small three-dimensional realizations of a channelized oil reservoir produced under water flooding conditions with eight water injectors and four oil producers. It has been used in numerous publications to demonstrate a variety of aspects related to...

journal article 2014

document

Interactive distributed optimisation for multidisciplinary design

Jansen, J.D. (author), Rolvink, A. (author), Coenders, J.L. (author), Schevenels, M. (author)

This paper presents the development of a multidisciplinary optimisation system for the Architecture Engineering and Construction (AEC) industry. The system consists of two major components, namely a multidisciplinary optimisation framework and a distributed cloud-based analysis framework. The former utilises an interactive optimisation search...

conference paper 2014

document

Value of information in closed-loop reservoir management

Barros, E.G.D. (author), Jansen, J.D. (author), Van den Hof, P.M.J. (author)

This paper proposes a new methodology to perform value of information (VOI) analysis within a closed-loop reservoir management (CLRM) framework. The workflow combines tools such as robust optimization and history matching in an environment of uncertainty characterization. The approach is illustrated with two simple examples: an analytical...

conference paper 2014

document

High-order simulation of foam enhanced oil recovery

Van der Meer, J.M. (author), Van Odyck, D.E.A. (author), Wirnsberger, P. (author), Jansen, J.D. (author)

If secondary hydrocarbon recovery methods fail because of the occurrence of gravity override or viscous fingering one can turn to an enhanced oil recovery method like the injection of foam. The generation of foam can be described by a set of partial differential equations with strongly nonlinear functions, which impose challenges for the...

conference paper 2014

document

Hidden information in ill-posed inverse problems

Kahrobaei, S. (author), Mansoori, M. (author), Joosten, G.J.P. (author), Van den Hof, P.M.J. (author), Jansen, J.D. (author)

It is well known that parameter updating of large-scale numerical reservoir flow models (a.k.a. ‘computer assisted history matching’) is an ill-posed inverse problem. Typically the number of uncertain parameters in a reservoir flow model is very large whereas the available information for estimating these parameters is limited. The classic...

conference paper 2014

document

Robust ensemble-based multi-objective optimization

Fonseca, R.M. (author), Stordahl, A. (author), Leeuwenburgh, O. (author), Van den Hof, P.M.J. (author), Jansen, J.D. (author)

We consider robust ensemble-based multi-objective optimization using a hierarchical switching algorithm for combined long-term and short term water flooding optimization. We apply a modified formulation of the ensemble gradient which results in improved performance compared to earlier formulations. We also apply multi-dimensional scaling to...

conference paper 2014

document

Quick assessment tool for assurance of structural safety in the building process

Terwel, K.C. (author), Jansen, S.J.T. (author)

From forensic investigation it is known that many structural failures can be attributed to human errors and organizational factors. To provide project leaders with information on the current state of factors in the building process influencing structural safety, we developed a quick assessment tool. Logistic regression was used, based on data of...

conference paper 2014

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Challenges in adjoint-based optimization of a foam EOR process

Namdar Zanganeh, M. (author), Kraaijevanger, J.F.B.M. (author), Buurman, H.W. (author), Jansen, J.D. (author), Rossen, W.R. (author)

We apply adjoint-based optimization to a Surfactant-Alternating-Gas foam process using a linear foam model introducing gradual changes in gas mobility and a nonlinear foam model giving abrupt changes in gas mobility as function of oil and water saturations and surfactant concentration. For the linear foam model, the objective function is a...

journal article 2014

document

Ensemble-based hierarchical multi-objective production optimization of smart wells

Fonseca, R.M. (author), Leeuwenburgh, O. (author), Van den Hof, P.M.J. (author), Jansen, J.D. (author)

In an earlier study two hierarchical multi-objective methods were suggested to include short-term targets in life-cycle production optimization. However this earlier study has two limitations: 1) the adjoint formulation is used to obtain gradient information, requiring simulator source code access and an extensive implementation effort, and 2)...

journal article 2014

document

Adjoint formulation and constraint handling for gradient-based optimization of compositional reservoir flow

Korounis, D. (author), Durlofsky, L.J. (author), Jansen, J.D. (author), Aziz, K. (author)

An adjoint formulation for the gradient-based optimization of oil-gas compositional reservoir simulation problems is presented. The method is implemented within an automatic differentiation-based compositional flow simulator (Stanford's AD-GPRS). The development of adjoint procedures for general compositional problems is much more challenging...

journal article 2014

document

Ratio between stone diameter and nominal diameter

Verhagen, H.J. (author), Jansen, L. (author)

For describing the relation between the grainsize and the nominal diameter (d50 vs. dn50) usually a factor 0.84 is used. This factor has been derived by Laan [1981] "De relatie tussen vorm en gewicht van breuksteen (the relation between shape and weight of pieces of rock), report MAW-R-81079". However, this original report cannot be retrieved...

report 2014

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The Egg model

Jansen, J.D. (author), Fonseca, R.M. (author), Kahrobaei, S. (author), Siraj, M. (author), Van Essen, G.M. (author), Van den Hof, P.M.J. (author)

The "Egg Model" is a synthetic reservoir model consisting of an ensemble of 101 relatively small three-dimensional realizations of a channelized reservoir produced under water flooding conditions with eight water injectors and four producers. It has been used in numerous publications to demonstrate a variety of aspects related to computer...

report 2013

document

Controllability and observability in two-phase porous media flow

Van Doren, J.F.M. (author), Van den Hof, P.M.J. (author), Bosgra, O.H. (author), Jansen, J.D. (author)

Reservoir simulation models are frequently used to make decisions on well locations, recovery optimization strategies etc. The success of these applications is, among other aspects, determined by the controllability and observability properties of the reservoir model. In this paper it is shown how the controllability and observability of two...

journal article 2013

document

A systems description of flow through porous media

Jansen, J.D. (author)

This text forms part of material taught during a course in advanced reservoir simulation at Delft University of Technology over the past 10 years. The contents have also been presented at various short courses for industrial and academic researchers interested in background knowledge needed to perform research in the area of closed-loop...

book 2013