CO2-EOR miscible oil displacement with MRST?

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Diego Corbo

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Apr 25, 2018, 2:29:05 PM4/25/18
to MRST-users: The Matlab Reservoir Simulation Toolbox User Group

Hi everyone,

I'm an student of the MSc in PE at Heriot-Watt and I was wondering if it is possible to simulate CO2 miscible displacement of oil in MRST for my thesis project. I am not sure if that can be done using co2lab or the EOR module..

Any help would be appreciated,

Cheers,
Diego

Olav Møyner

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Apr 25, 2018, 2:36:27 PM4/25/18
to Diego Corbo, MRST-users: The Matlab Reservoir Simulation Toolbox User Group

Hello Diego,


I am glad to hear that you are interested to use MRST for your thesis!


There are essentially two options for miscible CO2 simulation in MRST.


The first is to use the solvent module, which has a four-phase (water, oil, gas, solvent) model where the hydrocarbon "phases" can mix to a variable degree. This is an extension of the blackoil-type description and may be appropriate if you already have your model as some kind of blackoil model.


The second option is the compositional module, which models general n-component mixtures with an equation-of-state or K-values. This is the most general model, but can be quite expensive since each individual component must be tracked individually. It is fairly simple to set up, however, since you only have to specify a few properties for each molecular species.


Cheers,

Olav


---

Olav Møyner, PhD

SINTEF Digital

Department of Mathematics & Cybernetics

+47 99 02 49 49


From: sinte...@googlegroups.com <sinte...@googlegroups.com> on behalf of Diego Corbo <diego.nic...@gmail.com>
Sent: Wednesday, April 25, 2018 8:29:05 PM
To: MRST-users: The Matlab Reservoir Simulation Toolbox User Group
Subject: [MRST Users] CO2-EOR miscible oil displacement with MRST?
 
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Harry

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Sep 13, 2018, 5:03:50 PM9/13/18
to MRST-users: The Matlab Reservoir Simulation Toolbox User Group
Dear Olav,

Unlike the compositional module that provides a measure of dissolution of a component in each phase (for e.g., liquid) in terms of `state.components`, how does the solvent module provide this measure of dissolution of solvent in a liquid phase if there are water and oil present in the reservoir? The density of the solvent I am considering is close to a liquid's density, so it can be considered a liquid. The results from the solvent module provide `states.s:1`,...`states.s:4` for the four phases (water, oil, gas, solvent), which I believe are saturations that cannot tell how much solvent is dissolved in oil. Can you (or someone who has knowledge of this module) comment on how it is possible to obtain the mass of solvent dissolved in oil (or water)? Also, it is not clear to me what  `states.sr:1`, `states.sr:2` represent in the output from this module. 

Thank you,
Harry
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