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Goncalves Machado, C. (author), Egberts, P.J.P. (author), Alvestad, J. (author), Hustad, O.S. (author)Salt precipitation is a major issue in gas fields as it may reduce production significantly. Salt precipitation can be triggered through evaporation of the brine into the gas leading to an increased brine salt concentration and - if reaching its solubility - precipitation will occur reducing the rock porosity and, consequently, the permeability....conference paper 2023
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Egberts, P.J.P. (author), Peters, E. (author)Radial Jet Drilling (RJD) is a stimulation technique to increase a well’s performance through creation of multiple laterals of up to 100 m long. The technique has been used in the petroleum industry for several years and recently also for geothermal reservoirs. Interpretation of well tests of a well with multiple laterals may become problematic...article 2022
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Shoeibi Omrani, P.S. (author), Egberts, P.J.P. (author), Octaviano, R. (author)This paper presents the design and implementation of a geothermal doublet digital twin which allows for several functionalities in real time: - Monitoring of doublet performance and emission - Monitoring critical processes in the production such as corrosion, erosion and scaling - Detection of events and anomalies in the production - Process...conference paper 2022
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Egberts, P.J.P. (author), Tümer, C. (author), Loh, K.K.L. (author), Octaviano, R. (author)Different stakeholders have different design considerations that shape a heating grid. In short term, theserange from achieving lowest ownership costs to preventing monopolies. In long term, project developersfocus on how uncertainties of design parameters (e.g. demand/supply, heat prices) affect the grid designand, ultimately, the business case...article 2020
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- Egberts, P.J.P. (author), Nair, R. (author), Twerda, A. (author) conference paper 2018
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Peters, E. (author), Blöcher, G. (author), Salimzadeh, S. (author), Egberts, P.J.P. (author), Cacace, M. (author)Well inflow modelling in different numerical simulation approaches are compared for a multi-lateral well. Specifically radial wells will be investigated, which can be created using Radial Jet Drilling (RJD). In this technique, powerful hydraulic jets are used to create small diameter laterals (25-50 mm) of limited length (up to 100 m) from a...article 2018
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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
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Egberts, P.J.P. (author), Peters, E. (author)For stimulation of tight fields, alternatives to hydraulic fracturing based on hydraulic jetting are becoming available. With hydraulic jetting many (10 to 20) laterals can be created in a (sub-) vertical well. The laterals are 100 to 200 m long, typically 4 laterals are applied with a small inclination at a single kickoff depth. This type of...conference paper 2015
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Peters, E. (author), Egberts, P.J.P. (author), Loeve, D. (author), Hofstee, C. (author)Geological storage of CO2 in large, saline aquifers needs to be monitored for safety purposes. In particular the observation of the pressure behavior of a storage site is relevant for the indication of CO2 leakage. However, interpretation of observed pressure is not straightforward in these systems, due to the large number of natural processes...article 2015
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Leeuwenburgh, O. (author), Egberts, P.J.P. (author), Chitu, A.G. (author)We consider the problem of finding optimal long-term (life-cycle) recovery strategies for hydrocarbon reservoirs by use of simulation models. In such problems the presence of operating constraints, such as for example a maximum rate limit for a group of wells, may strongly influence the range of possible solutions. Commercial simulators often...conference paper 2015
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Egberts, P.J.P. (author), Shatyrbayeva, I. (author), Fokker, P.A. (author)In numerical reservoir simulation practise the orientation of the spatial grid is often dictated by geological features of the reservoir model. As a consequence the trajectory of, in particular, a horizontal or slanted well or a well with a complex geometry, possibly with multilaterals, generally is not aligned to the numerical grid. This...conference paper 2013
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Leeuwenburgh, O. (author), Egberts, P.J.P. (author), Abbink, O.A. (author)Several simple examples are presented that demonstrate the application of an ensemble-based method to production optimization. In particular, some practical aspects of the method such as ensemble size, perturbation, regularization and smoothing, and robust gradient estimation are discussed by comparison with an adjoint approach. The controls in...conference paper 2010
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Peters, E. (author), Leeuwenburgh, O. (author), Egberts, P.J.P. (author), TNO Bouw en Ondergrond (author)Increasing availability of data and tools for history matching and optimisation brings the long-term goal of closed loop reservoir management closer. However, still many issues are not solved. An example is the interaction between the history match of the reservoir model and the optimisation. How important is a good history match for the...conference paper 2009
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van der Meer, L.G.H. (author), Egberts, P.J.P. (author), TNO Bouw en Ondergrond (author)In the past, lists of potential CO2 storage locations have been compiled purely on the basis of the capacity of the locations in terms of their CO2 solubility. However, in some of these locations, the injection of CO2 is commercially unfeasible because of their small average permeability. During the active storage activity and in the first part...conference paper 2008
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TNO Bouw en Ondergrond (author), van Dijk, T.A.G.P. (author), Lindenbergh, R.C. (author), Egberts, P.J.P. (author)The superimposition of rhythmic bed forms of different spatial scales is a common and natural phenomenon on sandy seabeds. The dynamics of such seabeds may interfere with different offshore activities and are therefore of interest to both scientists and offshore developers. State-of-the-art echo sounding accuracy allows for the analysis of bed...article 2008
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Egberts, P.J.P. (author), Fokker, P.A. (author), TNO Bouw en Ondergrond (author)The vast amount of completion options Tor hydrocarbon reservoirs calls for fast productivity evaluation tools. We present a calculation method that can perform this task. It is a semi-analytical method that fully accounts for the 3D flow near the well. A superposition of analytical functions is tuned to approximate the boundary conditions by...conference paper 2007
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Kraaijevanger, J.F.B.M. (author), Egberts, P.J.P. (author), Valstar, J.R. (author), TNO Bouw en Ondergrond (author)This paper was selected for presentation by an SPE Program Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper, as presented, have not been reviewed by the Society of Petroleum Engineers and are subject to correction by the author(s). The material, as presented, does not...conference paper 2007
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van Kats, F.M. (author), Egberts, P.J.P. (author), Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author)Using a numerical technique, known as the lattice-Boltzmann method, we study immiscible three-phase flow at the pore scale. An important phenomenon at this scale is the spreading of oil onto the gas-water interface. In this paper, we recognize from first principles how injected gas remobilizes initially trapped oil blobs. The two main flow...article 1999
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Egberts, P.J.P. (author), Heederik, J.P. (author), van der Meer, M.J.M. (author), Vernoux, J.F. (author), Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author)Injection of formation water can cause formation damage due to theconference paper 1995