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Separator optimization

Why is it important? Why do we want to maximize oil production in our processing plants? Do we get the same value whether we sell our produced hydrocarbons as part of a liquid phase or a gas phase? The short answer is no! For any given component, a mole of that component sold as part […]

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LBC Viscosity Correlation for Gas Condensate Reservoirs

Author: Sissel Martinsen The Lohrenz-Bray-Clark (LBC) correlation is the compositional viscosity correlation most used in the upstream petroleum industry. It is a relatively simple model, consistent for both gas and oil phases (also near critical conditions). With proper application of the LBC model involving (a) careful selection of component critical volumes for C7+ fractions and […]

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Gridding in Reservoir Simulation

Author: Ilina Yusra One of the key questions that reservoir engineers come across in their work is how to determine the minimum number of grid blocks required in a reservoir model. Whether it is a full-field model or a simpler model, determining the number of grid blocks needed is not necessarily trivial, and failing in […]

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Global Component Lumping for EOS Calculations

Author: Ahmad Alavian Did you develop a detailed equation of state (EOS) model and you do not know how to lump the components? Here is how we do it! The EOS model must provide an accurate prediction of phase and volumetric behavior of relevant mixtures flowing through a given system being modeled. Properties of density, […]

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Estimating In-Situ Reservoir Fluid Compositions

Author: Markus Hays Nielsen Having a good estimate for the in-situ fluid composition is crucial for modeling and forecasting surface gas and oil rate (GOR) behavior, resulting in enhanced reserves estimation. Moreover, if we have in-situ compositions for all wells, it is possible to generate a compositional map which can be used for optimizing the […]

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Consistent Fluid Management from Reservoir to Sales

Author: Mathias Lia Carlsen PVT and fluid characterization are fascinating! Unlike other parameters needed for petroleum engineering calculations, PVT properties have an impact on essentially every discipline in the petroleum domain. Just think about it: whether you do engineering related to reservoir, production, pipeline, facility or process you need PVT. Even geologists need PVT to […]

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URTeC 539: Compositional Tracking of a Huff-n-Puff Project in the Eagle Ford

URTeC is just a week away. Mathias Lia Carlsen will present our paper written together with EP Energy “Compositional Tracking of a Huff-n-Puff Project in the Eagle Ford” Wednesday 24 July 8.30 pm, room 705. Authors: M.L. Carlsen*1, C.H. Whitson*1,3, M.M. Dahouk1, B. Younus1, I. Yusra1, E. Kerr2, J. Nohavitza2, M. Thuesen2, J.H. Drozd2, R. […]

URTeC 551: Field-wide Equation of State Model Development

URTeC is just a week away. Our CEO & Founder, Curtis Hays Whitson, will present our paper “Field-wide Equation of State Model Development” Monday 22 July 2.15 pm in Room 605/607. We hope to see you there! Authors: Bilal Younus*1, Curtis H. Whitson1,2, Ahmad Alavian1, Mathias L. Carlsen1, Sissel Ø. Martinsen1, Kameshwar Singh1 || 1. […]

Ensuring Consistent EOS Model Transfer from one PVT Package to Another

Author: Bilal Younus There are many commercial PVT packages in the oil and gas industry (e.g. PhazeComp, PVTi, PVTp, PVTSim, WinProp, PVTx). These PVT packages are either used for EOS model development or leverage an existing EOS model for different engineering applications or both. Occasionally, an EOS model is developed in a different (external) PVT […]

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ASTM D2892 Data for Better C7+ Characterization in EOS Modelling

Author: Bilal Younus An EOS model requires five properties for each component in a mixture: critical pressure (pc), critical temperature (Tc), acentric factor (ω), molecular weight (M) and volume shift (s). The three first properties define the vapor pressure curve of the component, and the last two properties (parameter) ensures accurate prediction of liquid density […]