Author: Mathias Lia Carlsen * This is a short-version of SPE-199982-MS that will be presented on the SPE Canada Unconventional Resources Conference 18 March 2020 in Calgary, Canada. The manuscript can be found attached to this blog post. CGR Normalization – What is it?Black oil tables are generated assuming a fixed surface process, but in […]
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 […]
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 […]
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 […]
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, […]
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 […]
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 […]
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 […]
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 […]
Author: Stian Mydland When running compositional reservoir simulations, it is always good practice to quality check that the equation of state (EOS) model developed in a standalone PVT package is exported correctly to the simulator. This is achieved by taking the fluid related output from e.g. CMG GEM, Eclipse 300, or Sensor, and compare it […]