[Opm] Problem with injecting field voidage replacement
Stephen, Karl D
K.D.Stephen at hw.ac.uk
Sat Mar 16 20:21:37 UTC 2019
Hi Kai and Atgeirr,
One more observation on this. I decided to switch to controlling the injected and produced volumes directly to see what happens when I give them the same reservoir volume rate (11000 RB/DAY).
WCONPROD
PROD OPEN RESV 4* 11000 2000 /
/
WCONINJE
INJ WATER OPEN RESV 1* 11000 6000 /
/
The answer is fine for Bw=1.0 (below) but pressures drop for Bw=0.99 and there are small differences between FVIR and FVPR. Meanwhile, there is a convergence problem for Bw>1.01:
-- Days dd/mm/yyyy FPR FVIR FVPR FWPR
-------------------------------------------------------------------------------------------
0.00 01/01/2020 4500 0 -0 5.4344e-09
1.00 02/01/2020 4499.7 11000 11000 3.46529
4.00 05/01/2020 4498.49 11000 11000 4.20533
13.00 14/01/2020 4497.23 11000 11000 4.01551
40.00 10/02/2020 4494.02 11000 11000 3.43152
121.00 01/05/2020 4488.55 11000 11000 12.0115
200.00 19/07/2020 4484.68 11000 11000 43.7326
400.00 04/02/2021 4478.2 11000 11000 421.74
600.00 23/08/2021 4474.74 11000 11000 1210.85
800.00 11/03/2022 4473.34 11000 11000 2397.66
1000.00 27/09/2022 4472.98 11000 11000 3748.86
1200.00 15/04/2023 4473.16 11000 11000 4920.79
1400.00 01/11/2023 4473.54 11000 11000 5909.86
1600.00 19/05/2024 4474.01 11000 11000 6682.72
1800.00 05/12/2024 4474.51 11000 11000 7341.28
2000.00 23/06/2025 4475.03 11000 11000 7908.44
-----Original Message-----
From: Opm <opm-bounces at opm-project.org> On Behalf Of Bao Kai
Sent: 15 March 2019 21:58
To: opm at opm-project.org
Subject: Re: [Opm] Problem with injecting field voidage replacement
Hi, Karl,
It looks like there is a possible bug in the OPM implementation which requires some WCONINJE keyword for a injector to make the injector work, even if you have group control upon it. (something we need to investigate it)
Anyway, I could not see big problem with your output data. When INJ is working under group control, it looks like FVIR == FGPR, which means the group control is honored in a good way.
But INJ also has its own injection rate limit 11000 (provided with
WCONINJE) and it works under this limit at the beginning then switch to work under VREP group control later.
When you set B_w == 1.0 in PVTW, due to the existence of compressibility, the final B_w will be slightly different from 1.0 depending the pressure you use.
The FPR is decreasing in the beginning is because the voidage rate you are injecting is smaller than the voidage rate you are producing, (FVIR < FVPR due to existence of the WCONINJE injection rate limit.)
One solution is just increase the rate limit in WCONINJE so that that limit is so high and it will not limit much. The INJ will always work under group VREP control.
I changed the schedule as follows,
```
-- Production control
-- Well Status Control Oil Wat Gas Liq Resv BHP
-- name mode rate rate rate rate rate limit
-- ---- ------ ------ ---- ---- ---- ---- ---- -----
WCONPROD
PROD OPEN LRAT 3* 10000 1* 2000 /
/
-- Injection control
-- Well Fluid Status Control Surf Resv BHP
-- NAME TYPE mode rate rate limit
-- ---- ----- ------ ------- ---- ---- -----
WCONINJE
INJ WATER OPEN RATE 110000 1* 6000 /
/
-- GRO Fluid Control Surf Resv ReInj Voidage GRUP
-- NAME TYPE mode rate rate frac Frac CNTL
-- ---- ----- ------ ------- ---- ---- ---- ---- -----
GCONINJE
-- FIELD WATER VREP 3* 1.0 NO /
G1 WATER VREP 3* 1.0 /
/
-- Number and size (days) of timesteps
TSTEP
10*200 /
```
Then the result is
summary.x TUT1G1_SPE9. FPR FVIR FVPR
-- Days dd/mm/yyyy FPR FVIR FVPR
--------------------------------------------------------------------------
1.00 02/01/2020 4498.11 11499.4 11499.4
4.00 05/01/2020 4496.79 11499.3 11499.3
13.00 14/01/2020 4495.43 11499.4 11499.4
40.00 10/02/2020 4491.98 11499.5 11499.5
121.00 01/05/2020 4485.95 11497.8 11497.8
200.00 19/07/2020 4481.67 11491.7 11491.7
400.00 04/02/2021 4475.47 11424.2 11424.2
600.00 23/08/2021 4472.37 11292.4 11292.4
800.00 11/03/2022 4471.52 11110 11110
1000.00 27/09/2022 4472.95 10920.1 10920.1
1200.00 15/04/2023 4473.7 10764.3 10764.3
1400.00 01/11/2023 4474.59 10637.2 10637.2
1600.00 19/05/2024 4475.52 10539.8 10539.8
1800.00 05/12/2024 4476.48 10457.3 10457.3
2000.00 23/06/2025 4477.32 10386.9 10386.9
Please let me know if it is something you are looking for.
Best,
Kai Bao
On Fri, Mar 15, 2019 at 6:36 PM Stephen, Karl D <K.D.Stephen at hw.ac.uk> wrote:
>
> Hi Kai,
> For completeness, I removed the final WCONINJE keyword and the reference to FIELD in the GCONINJE keyword to be more consistent with the SPE9 case. Bw=1 again.
>
> -- Days dd/mm/yyyy FPR FVIR FVPR
> --------------------------------------------------------------------------
> 0.00 01/01/2020 4500 0 -0
> 1.00 02/01/2020 4495.02 11000 11499.4
> 4.00 05/01/2020 4483.38 11000 11499.3
> 13.00 14/01/2020 4450.86 11000 11499.4
> 40.00 10/02/2020 4353.57 11000 11499.6
> 97.50 07/04/2020 4149.48 11000.1 11499.5
> 148.75 28/05/2020 3965.53 11000.2 11498.8
> 200.00 19/07/2020 3781.38 11000.2 11497
> 298.64 25/10/2020 3432.1 11000.4 11487
> 400.00 04/02/2021 3086.74 11000.5 11468.6
> 500.00 15/05/2021 2766.78 11000.6 11440.7
> 600.00 23/08/2021 2505.6 11000.7 11358.2
> 700.00 01/12/2021 2504.02 10997.4 10997.4
> 800.00 11/03/2022 2518.26 10945.8 10945.8
> 1000.00 27/09/2022 2557.13 10960.5 10960.4
> 1200.00 15/04/2023 2573.25 10810.6 10810.6
> 1400.00 01/11/2023 2574.08 10699.4 10699.4
> 1600.00 19/05/2024 2559.59 10575.9 10576
> 1800.00 05/12/2024 2562.13 10470.6 10470.6
> 2000.00 23/06/2025 2564.31 10385.1 10385.1
> 2200.00 09/01/2026 2566.22 10317.3 10317.3
>
> The result is initially identical with FPR etc. but once water breaks through, there are differences.
>
> If anyone has another case that successfully tests field voidage replacement that would be great.
>
> Karl
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