Hi again, Karl,
Basically, my previous message is about the following group control
will not work with the current OPM implementation in my understanding.
```
GCONINJE
FIELD WATER VREP 15000 2* 1.0 NO /
G2 WATER VREP 15000 2* 1.0 YES / --
THIS IS EXTRA!!!!!!!!
/
```
I do not know what kind of group structure OPM will get if we do not
use `GRUPTREE` to build one explicitly. Eclipse might have some
default behavoir while OPM might not support it well (default
behavoirs are pretty difficult to support in a complete manner in my
opinion.)
I will suggest you to follow the example
https://github.com/OPM/opm-tests/tree/master/spe9group also use
`GRUPTREE` to build the group structure in an explicit manner.
I do not have a good idea about the issue related to FVIR and FVPR .
I am not sure whether it is a simulation problem or a output problem,
or both.
Best Regards,
Kai Bao
On Fri, Mar 15, 2019 at 12:21 PM Bao Kai <[email protected]> wrote:
>
> I forgot to reply the message to the OPM mailing lists. Just forward
> the reply here.
>
> ---------- Forwarded message ---------
> From: Bao Kai <[email protected]>
> Date: Fri, Mar 15, 2019 at 10:51 AM
> Subject: Re: [Opm] Problem with injecting field voidage replacement
> To: Stephen, Karl D <[email protected]>
>
>
> Hi, Stephen,
>
> Thanks for the message and all the efforts to create this case and
> provide the DATA file.
>
> I have not been able to run the deck, while this is some inputs from my side.
>
> Group control is very general and flexible, we currently only support
> very limited subset of the features related to group control based on
> our project requirements. We will have continuous efforts to complete
> and improve the group control functionality when we can allocate
> resources.
>
> As for your deck, we do not support one group to obtain voidage rate
> based on the production rate from another group, and also, we
> understand it is not very trivial to fix based on the current
> implementation.
>
> We have an example in opm-tests to demonstrate what features related
> to group control we are supporting,
> https://github.com/OPM/opm-tests/tree/master/spe9group .
>
> Please take a look at this example to see whether you can change your
> group structure a little bit (similar to the example spe9group) and
> also fulfill your purpose. Please let me know if you need any help
> for it.
>
> Hope it is helpful to you.
>
> Best Regards,
> Kai Bao
>
>
>
> On Fri, Mar 15, 2019 at 2:05 AM Stephen, Karl D <[email protected]> wrote:
> >
> > Hi,
> > I have a problem with a simple quarter 5 spot waterflood model where I
> > would like to inject water with field voidage replacement. There are two
> > wells: injector, INJ, and producer, PROD. I would hope that the field
> > voidage replacement takes the production rate in reservoir volumes and uses
> > that to inject water at the same reservoir volumetric rate. If the
> > injection and production volumes are the same the field average pressure,
> > FPR, should be relatively constant.
> >
> > The problem I have is that while the reported FVIR and FVPR are the same
> > and the FWIR seems to be right as is the sum of FOPR and FWPR, the FPR
> > (average pressure) does not remain relatively constant. Instead there is a
> > drift as if the actual volumes injected and produced are different.
> >
> > The problem seems to be to do with the definition of the formation volume
> > factor for water, Bw, that is defined in the PVTW keyword. Bw is defined at
> > a reference pressure which is the same as the initial average pressure. If
> > it is 1.0 exactly then the hoped for result is obtained. If I use a more
> > realistic value of 1.02, the volumes are incorrect and FPR eventually rises
> > when water breaks through. Similarly if Bw is set to 0.99, the pressure
> > goes down. I have deliberately set the compressibility of water to be very
> > small and in PVDO, the Bo (formation volume factor for oil) is almost
> > independent of pressure (when I started, Bo and Bw were dependent on
> > pressure).
> >
> > Perhaps I am doing something wrong with the keywords, there is a setting I
> > need to implement or is there a a bug in the code?
> >
> > Can anyone help?
> >
> > I attach my code for analysis.
> >
> > Using Eclipse I can get a good result. I set up the well controls with:
> >
> > - GRP Fluid Control Surf Resv ReInj Voidage GRUP
> > -- NAME TYPE mode rate rate frac Frac CNTL
> > -- ---- ----- ------ ------- ---- ---- ---- ---- -----
> > GCONINJE
> > FIELD WATER VREP 15000 2* 1.0 NO /
> > /
> > -- Injection control
> > -- Well Fluid Status Control Surf Resv BHP
> > -- NAME TYPE mode rate rate limit
> > -- ---- ----- ------ ------- ---- ---- -----
> > WCONINJE
> > INJ WATER OPEN GRUP 15000 1* 8000 /
> > /
> >
> >
> > This doesn't work in OPM where I have to add the group control for my
> > injector, INJ.
> >
> > - GRP Fluid Control Surf Resv ReInj Voidage GRUP
> > -- NAME TYPE mode rate rate frac Frac CNTL
> > -- ---- ----- ------ ------- ---- ---- ---- ---- -----
> > GCONINJE
> > FIELD WATER VREP 15000 2* 1.0 NO /
> > G2 WATER VREP 15000 2* 1.0 YES / -- THIS
> > IS EXTRA!!!!!!!!
> > /
> > -- Injection control
> > -- Well Fluid Status Control Surf Resv BHP
> > -- NAME TYPE mode rate rate limit
> > -- ---- ----- ------ ------- ---- ---- -----
> > WCONINJE
> > INJ WATER OPEN GRUP 15000 1* 8000 /
> > /
> >
> >
> > Karl Stephen
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