Author: Arnaud Hoffmann To reduce CPU time in compositional petroleum simulation models (e.g. compositional reservoir simulations), a minimum number of components should be used in the equation of state (EOS) to describe the fluid phase and volumetric behavior. A ″detailed” EOS model often contains from 20 to 40 components, with the first 10 components representing […]
Author: Stian Mydland *This is a short-version of URTEC-2020-2765-MS presented at Unconventional Resources Technology Conference (URTeC) 2020. Paper can be downloaded in the end of this article. Reservoir simulation requires a fluid model to describe the volumetric behavior of gas and oil. When initiating a reservoir simulation study, we have to choose whether to use […]
Author: Mathias Lia Carlsen * This is a short-version of URTeC-2869-MS that was presented on the URTeC 21 July 2020. The manuscript can be found attached to this blog post. The HnP project studied in this paper involves a group of 11 wells configured such that four of the wells were subjected to cyclic injection […]
Author: Bilal Younus The term “single phase labeling” means to determine whether the given total composition zi (in a specific grid cell in the model) exists as single-phase “oil” or single-phase “gas” when the grid cell pressure is higher than the saturation pressure ps = f(zi,T), where T is the temperature in the model. A […]
Author: Erlend Torheim It is important to understand and model the reduction in well deliverability due to condensate blockage in gas condensate wells. Failing to do so can lead to inappropriate design of (a) well completion, (b) number of wells required for development, and (c) compression requirements – all having a significant bottom-line impact on […]
Author: Markus Hays Nielsen Most petroleum engineers understand that engineering calculations require the properties of fluids. “Fluid” is a term used to describe gases and liquids. An equation of state (EOS) is nothing more than a fluid model. Specifically, an EOS is a fluid model that takes a molar composition (z) and predicts the phase […]
Author: Stian Mydland *This is a short-version of SPE-200396-MS to be presented at SPE Increased Oil Recovery Conference 2020, Tulsa, OK, USA. Gas-Based EOR in Tight Unconventionals Gas-based EOR is currently being pilot-tested extensively in liquid-rich North-American tight unconventionals with the majority of projects using the Huff-n-Puff (HnP) method. This method differs from conventional displacement […]
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 […]