Searched for: author:"Leeuwenburgh, O."
(1 - 20 of 55)

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Xiao, C. (author), Leeuwenburgh, O. (author), Lin, H.X. (author), Heemink, A. (author)
A reduced order modeling algorithm for the estimation of space varying parameter patterns in numerical models is proposed. In this approach domain decomposition is applied to construct separate approximations to the numerical model in every subdomain. We introduce a new local parameterization that decouples the computational cost of the...
article 2021
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Xiao, C. (author), Leeuwenburgh, O. (author), Lin, H.X. (author), Heemink, A.W. (author)
article 2021
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Ramaswamy, K.R. (author), Fonseca, R.M. (author), Leeuwenburgh, O. (author), Siraj, M.M. (author), van den Hof, P.M.J. (author)
We are concerned with the efficiency of stochastic gradient estimation methods for large-scale nonlinear optimization in the presence of uncertainty. These methods aim to estimate an approximate gradient from a limited number of random input vector samples and corresponding objective function values. Ensemble methods usually employ Gaussian...
article 2020
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Barros, E.G.D. (author), Chitu, A. (author), Leeuwenburgh, O. (author)
The general field development optimization problem is complex due to the potentially large number of controls of mixed type and discontinuities in the objective function related to varying numbers and types of wells being placed in a discretized grid. This may make the problem challenging or even unsuitable for certain types of optimization...
article 2020
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Xiao, C. (author), Heemink, A. (author), Lin, H. (author), Leeuwenburgh, O. (author)
Seismic history matching can play a key role in geological characterization and uncertainty quantification. However, challenges related to intensive computational demands and complexity restricts its application in many practical cases. This paper presents a conceptual deep-learning-based framework fully deployed in the popular Pytorch...
conference paper 2020
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Barros, E. (author), Hanea, R. (author), Hustoft, L. (author), Leeuwenburgh, O. (author), Fonseca, R. (author)
The development of oil and gas fields requires asset teams to make complex decisions in the presence of uncertainties. Studies of reservoir management strategies typically focus exclusively on geological uncertainties by working with an ensemble of reservoir model realizations. However, the development of hydrocarbon reservoirs is often also...
conference paper 2020
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Barros, E.G.D. (author), Leeuwenburgh, O. (author), Carpentier, S.F.A. (author), Wilschut, F. (author), Neele, F.P. (author)
Managing the risk of unexpected events occurring during site operations and reducing operational costs are paramount to ensure the success of CO2 storage projects. For this purpose, operators need to design cost-effective monitoring systems to detect signals that can indicate whether or not the storage site behaves as expected and will continue...
conference paper 2018
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Barros, E. (author), Leeuwenburgh, O. (author), Carpentier, S. (author), Wilschut, F. (author), Neele, F. (author)
To manage risks in CO2 storage operations, monitoring systems need to be designed such that the data can inform the operator whether the storage site will continue to behave as expected or not. In order to compare the benefits of different monitoring strategies, we require a measure of ‘efficiency' that is based on a balance between monitoring...
conference paper 2018
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Sangers, M. (author), Trujillo, R. (author), Voskov, D. (author), Leeuwenburgh, O. (author)
We investigate the potential for improved recovery of subsurface energy resources (hydrocarbons or heat) through in-depth diversion technology. A number of pilot studies in the North Sea have demonstrated in recent years that sodium silicate can be used to block preferential flow paths and divert water to previously unswept areas of a reservoir....
conference paper 2018
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Barros, E.G.D. (author), Leeuwenburgh, O. (author), Carpentier, S.F.A. (author), Wilschut, F. (author), Neele, F.P. (author)
In this paper we address the challenge of efficient and reliable monitoring of subsurface CO2 storage operations for conformance verification purposes. In order to acquire a storage license, the operator has to demonstrate convincingly to the regulator that the operation of the site will conform to safety regulations, and that CO2 will remain...
conference paper 2018
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Hanea, R.G. (author), Casanova, P. (author), Hustoft, L. (author), Bratvold, R.B. (author), Nair, R. (author), Hewson, C.W. (author), Leeuwenburgh, O. (author), Fonseca, R.M. (author)
The goal of reservoir management is to make decisions with the objective of maximizing the value creation from the oil or gas production. In order to do this models that preserve geological realism and have predictive capabilities are being developed and used. These models are commonly calibrated by using Assisted History Matching (AHM) methods...
conference paper 2017
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Feng, T. (author), Leeuwenburgh, O. (author), Hewson, C. (author), Hanea, R.G. (author)
Alternating injection of water and gas (WAG) has been widely applied as an oil recovery strategy since the late 1950s. The expected benefits are improved macroscopic sweep, with the water and gas sweeping lower and upper zones of the reservoir respectively, and improved microscopic sweep due to various effects leading to lowering of the residual...
conference paper 2017
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Zhang, Y. (author), Leeuwenburgh, O. (author), Carpentier, S. (author), Steeghs, P. (author)
A distance parameterization of flood fronts derived from time-lapse seismic anomalies was recently developed to facilitate incorporation of time-lapse seismic data into history matching workflows based on ensemble methods such as the ensemble Kalman filter (EnKF) and the ensemble smoother (ES). A number of advantages were demonstrated on...
conference paper 2017
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Hewson, C.W. (author), Leeuwenburgh, O. (author)
An ensemble-based production optimization technique is applied to a simulation model of OMERS Energy's Chigwell Viking Pool in order to determine optimal CO2-WAG cycle length, injection rates and production bottom hole pressures (BHPs). An ensemble-based approximate gradient calculation is used in an expected net present value (NPV) maximization...
conference paper 2017
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Carpentier, S.F.A. (author), Steeghs, T.P.H. (author), Zhang, Y. (author), Leeuwenburgh, O. (author)
Recent progress in 4D seismic history matching benefits greatly from the use of 4D seismic timelapse data. Several methods for inversion of 4D seismic timelapse data for reservoir pressure and saturation have been developed with mixed success. Most of these methods work well on synthetic data or real data with low noise levels, but degrade in...
conference paper 2017
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Hajibeygi, H. (author), Jansen, J.D. (author), Leeuwenburgh, O. (author), Voskov, D. (author)
article 2017
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Chitu, A.G. (author), Leeuwenburgh, O. (author), Candela, T.G.G. (author), Osinga, S. (author), Kraaijpoel, D.A. (author), Wassing, B.B.T. (author)
Pore pressure changes caused by the production of gas from reservoir rocks result in reservoir compaction, stress changes on faults, potential fault reactivation and related seismic activity. This seismic activity is expected to be affected by the amount of pressure change, the spatial distribution of the pressure changes relative to the...
other 2017
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Chen, B. (author), Fonseca, R.M. (author), Leeuwenburgh, O. (author), Reynolds, A.C. (author)
We develop a framework based on the lexicographic method and the newly developed Stochastic-Simplex-Approximate-Gradient (StoSAG) algorithm to maximize the expected net-present-value (NPV) and minimize the associated risk or uncertainty in robust life-cycle production optimization. With the lexicographic method, we first maximize the expectation...
article 2017
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Zhang, Y. (author), Leeuwenburgh, O. (author)
Recently, a distance parameterization of flood fronts derived from seismic anomalies was proposed as a solution in combination with the ensemble Kalman filter (EnKF), which is known as an efficient method for conditioning of multiple reservoir models to observed data. Even though the distance parameterization in terms of front positions is...
conference paper 2016
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Leeuwenburgh, O. (author), Chitu, A.G. (author), Nair, R. (author), Egberts, P.J.P. (author), Ghazaryan, L. (author), Feng, T. (author), Hustoft, L. (author)
One of the main activities in the (re-)development of large hydrocarbon fields is the drilling of new wells. The drilling process may involve a large number of wells and take several years to complete. Challenges include the selection of a limited set of wells from many possible well paths, and the scheduling of the drilling itself....
conference paper 2016
Searched for: author:"Leeuwenburgh, O."
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