Searched for: faculty%3A%22Civil%255C+Engineering%255C+%2526%255C+Geosciences%22
(1 - 20 of 95)
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Alabart, J. (author), Sanchez-Arcilla, A. (author), Van Vledder, G.P. (author)Wave penetration inside harbours has been one the main issues that port planners and engineers have had to deal with in recent years. Wave conditions inside harbours trigger vessel movements, create dynamic loads on port structures and condition harbour exploitation and safety. For this reason in the recent past maritime and port engineers have...conference paper 2014
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Goncalves Dias De Barros, E. (author), Leeuwenburgh, O. (author), van den Hof, P.M.J. (author), Jansen, J.D. (author)This paper extends previous work on value of information (VOI) assessment in closed-loop reservoir management (CLRM) to estimate the added value of performing multiple measurements along the producing life of the reservoir. The new procedure is based on the workflow from our previous paper which allows to quantify the VOI of a single observation...conference paper 2015
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Mansoori, Mehdi (author), Dankers, Arne (author), van den Hof, P.M.J. (author), Jansen, J.D. (author), Rashtchian, Davood (author)We present a novel method for estimating physical properties of an underground hydrocarbon reservoir, on the basis of generally measured wellbore ow rate and pressure signals at the bottom of a producing well. The method uses instrumental variable-based system identification techniques to solve for a closed-loop errors-in-variables problem....conference paper 2015
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Fonseca, R.M. (author), Kahrobaei, S.S. (author), Van-Gastel, L. J T (author), Leeuwenburgh, O. (author), Jansen, J.D. (author)With an increase in the number of applications of ensemble optimization (EnOpt) for production optimization, the theoretical understanding of the gradient quality has received little attention. An important factor that influences the quality of the gradient estimate is the number of samples. In this study we use principles from statistical...conference paper 2015
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Fonseca, R.M. (author), Leeuwenburgh, O. (author), Della Rossa, E (author), van den Hof, P.M.J. (author), Jansen, J.D. (author)We consider robust ensemble-based (EnOpt) multiobjective production optimization of on/off inflow-control devices (ICDs) for a sector model inspired by a real-field case. The use of on/off valves as optimization variables leads to a discrete control problem. We propose a reparameterization of such discrete controls in terms of switching times...conference paper 2015
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Diaz Cortes, G.B. (author), Vuik, Cornelis (author), Jansen, J.D. (author)We consider deflation-based pre-conditioning of the pressure equation for large-scale reservoir models with strong spatial variations in the permeabilities. The use of deflation techniques involves the search for good deflation vectors, which usually are problem-dependent. We propose the use of proper orthogonal decomposition (POD) to generate...conference paper 2016
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Jesus de Moraes, R. (author), Rodrigues, J.R.P. (author), Hajibeygi, H. (author), Jansen, J.D. (author)We present an efficient multiscale (MS) gradient computation that is suitable for reservoir management studies involving optimization techniques for, e.g., computer-assisted history matching or life-cycle production optimization. The general, algebraic framework allows for the calculation of gradients using both the Direct and Adjoint derivative...conference paper 2016
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Goncalves Dias De Barros, E. (author), Yap, F.K. (author), Insuasty, E (author), Van den Hof, PMJ (author), Jansen, J.D. (author)Closed-loop reservoir management (CLRM) is a combination of life-cycle optimization and computerassisted history matching. The application of the CLRM framework to real field cases can be computationally demanding. An even higher computational load results from procedures to assess the value of information (VOI) in CLRM. Such procedures, which...conference paper 2016
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van der Meer, J.M. (author), Kraaijevanger, JFBM (author), Möller, M. (author), Jansen, J.D. (author)Many enhanced oil recovery (EOR) processes can be described using partial differential equations with parameters that are strongly non-linear functions of one or more of the state variables. Typically these nonlinearities result in solution components changing several orders of magnitude over small spatial or temporal distances. The numerical...conference paper 2016
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Siraj, Mohsin (author), van den Hof, Paul (author), Jansen, J.D. (author)The theory of risk provides a systematic approach to handling uncertainty with well-defined risk and deviation measures. As the model-based economic optimization of the water-flooding process in oil reservoirs suffers from high levels of uncertainty, the concepts from the theory of risk are highly relevant. In this paper, the main focus is to...journal article 2016
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Fonseca, R.M. (author), Chen, B (author), Jansen, J.D. (author), Reynolds, Albert C. (author)We consider a technique to estimate an approximate gradient using an ensemble of randomly chosen control vectors, known as Ensemble Optimization (EnOpt) in the oil and gas reservoir simulation community. In particular, we address how to obtain accurate approximate gradients when the underlying numerical mod- els contain uncertain parameters...journal article 2016
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den Besten, N.I. (author), Pande, S. (author), Savenije, Hubert (author)Maharashtra is one of the States in India that has witnessed one of the highest rates of farmer suicides as proportion of total number of suicides. Most of the farmer suicides in Maharashtra are from semi-arid divisions such as Marathwada where cotton has been historically grown. Other dominant crops produced include cereals, pulses, oilseeds...journal article 2016
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Kahrobaei, S.S. (author), Mansoori Habibabadi, M. (author), Joosten, G. J P (author), Van Den Hof, P. M J (author), Jansen, J.D. (author)Classic identifiability analysis of flow barriers in incompressible single-phase flow reveals that it is not possible to identify the location and permeability of low-permeability barriers from production data (wellbore pressures and rates), and that only averaged reservoir properties in between wells can be identified. We extend the classic...journal article 2016
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Fonseca, R.M. (author), Reynolds, Albert C. (author), Jansen, J.D. (author)Conflicting objectives are frequently encountered in most real-world problems. When dealing with conflicting objectives, decision makers prefer to obtain a range of possible optimal solutions from which to choose. In theory, methods exists that can produce a range of possible solutions, some of which are “Pareto Optimal”. The application of...journal article 2016
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van Essen, G. M. (author), Kahrobaei, S.S. (author), van Oeveren, H. (author), van den Hof, P.M.J. (author), Jansen, J.D. (author)We present a method to determine lower and upper bounds to the predicted production or any other economic objective from history-matched reservoir models. The method consists of two steps: 1) performing a traditional computer-assisted history match of a reservoir model with the objective to minimize the mismatch between predicted and observed...journal article 2016
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Insuasty, E (author), van den Hof, P.M.J. (author), Weiland, S (author), Jansen, J.D. (author)In this work, the application of tensor methodologies for computer-assisted history matching of channelized reservoirs is explored. A tensor-based approach is used for the parameterization of petrophysical parameters to reduce the dimensionality of the parameter estimation problem. Building on the work of Afra and Gildin (2013); Afra et.al. ...conference paper 2017
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Jesus de Moraes, R. (author), Fonseca, R.M. (author), Helici, M. (author), Heemink, A.W. (author), Jansen, J.D. (author)In this work, the application of tensor methodologies for computer-assisted history matching of channelized reservoirs is explored. A tensor-based approach is used for the parameterization of petrophysical parameters to reduce the dimensionality of the parameter estimation problem. Building on the work of Afra and Gildin (2013); Afra et.al. ...conference paper 2017
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- Jansen, J.D. (author) other 2017
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- Jansen, J.D. (author), van Essen, G (author), Siraj, M (author), van den Hof, P (author) other 2017
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- van der Meer, J.M. (author), Farajzadeh, R. (author), Jansen, J.D. (author) conference paper 2017
Searched for: faculty%3A%22Civil%255C+Engineering%255C+%2526%255C+Geosciences%22
(1 - 20 of 95)