Transcript SGTPIPE - Oil

SGTPIPE / SGTFLOW
vs
PIPESIM
benchmarking
By the instrumentality of
EPTG Pipelines Team, BP Exploration
Copyright © Dmitry Prytkov, R&D «SibGeoTech»
Sunbury on Thames (London), UK
09.04.2007
Examined oil gathering systems
“Oilfield 1”
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(North America, USA)
Actual state on 2005
Prediction on 2012 year
Dead oil density, kg/m3
Water cut, %
Gas-Oil Ratio, nm3/m3
“Oilfield 2”
(Western Siberia, Russia)
 Actual state on 2006
“Oilfield 1”
“Oilfield 2”
876-960
850
1 - 99
78-96
208 – 17810
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All data are real. They are chosen and are provided by
EPTG Pipeline Systems Team, BP Exploration, Sunbury (London), UK.
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Multiphase flow correlations
PIPESIM:
 Beggs-Brill Revised
 OLGA-S 2000
SGTPIPE / SGTFLOW:
 SGTFLOW correlation (developed on the
base of VNIIGAS methodology)
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Multiphase flow simulation
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oil physical properties in operating conditions
single oil degassing in operating conditions
natural gas physical properties in operating
conditions
oil-water mixture and physical properties in
operating conditions
actual estimated gas content and multiphase
flow regime according to a pipeline relief in
operating conditions
hydrostatic and friction pressure losses in
operating conditions
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PIPESIM to SGTPIPE / SGTFLOW
model moving
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Average of black oil properties
Average of fluid temperature by pipeline
network («Oilfield 1»)
Summarize of well flow rates by pads
(«Oilfield 1»)
Refine upon free gas flow rates
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Oil gathering system of “Oilfield 1”
(actual state at 18.04.2005)
PIPESIM
SGTPIPE
L Pad
5.
V Pad
3.
1.
6.
Z Pad
8.
2.
GS-2
7.
4.
W Pad
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Presure, atma__
Oil gathering system of “Oilfield 1”
(actual state at 18.04.2005)
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
L Pad
Actual pressure
V Pad
PIPESIM (Beggs-Brill Rev)
Z Pad
W Pad
PIPESIM (OLGA-S)
SGTFLOW
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Oil gathering system of “Oilfield 1”
(prediction on 2013)
PIPESIM
SGTPIPE
Model
Gas Water Oil
L Pad
1.
I Pad
V Pad
3.
1.
5.
Z Pad
GPP
2.
4.
W Pad
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Pressure, atma___
Oil gathering system of “Oilfield 1”
(prediction on 2013)
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
I Pad
L Pad
PIPESIM (Beggs-Brill Rev)
V Pad
W Pad
PIPESIM (OLGA-S)
Z Pad
SGTFLOW
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Oil gathering system of
“Oilfield 2”
PIPESIM
SGTPIPE
Модель
1.
1605
Вода
Газ Нефть
2.
5.
4.
1599b
4.
3.
7.
6.
8.
1602
10.
1604
11.
1598
13.
12.
1590
14.
1584
9.2
9.
15.
Сток
2435
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Comparison between predicted and actual
pressure by pads of “Oilfield 2”
(with OLGA-S correlation)
30,0
28,0
Pressure, atma__
26,0
24,0
22,0
20,0
18,0
16,0
14,0
12,0
K1584
K1590
Actual
K1598
K1599B
Beggs-Brill Rev
K1602
K1604
OLGA-S 2000
K1605
K2435
SGTFLOW
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Average difference between actual
and estimated pad pressure
3,5
Average delta, atma__
3,0
2,5
2,0
1,5
1,0
0,5
0,0
"Oilfield 2"
Beggs-Brill Rev
"Oilfield 1"
OLGA-S 2000
SGTFLOW
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Conclusions
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PIPESIM with Beggs-Brill Revised correlation shows the
worst convergence with actual data in case of elevation
pipelines with high gas-liquid ratio and/or low flow rate.
In this case it is not recommended to use Beggs-Brill
Revised correlation for calculation of such systems
SGTFLOW and PIPESIM with OLGA-S 2000 correlation
shows similar simulation result in all examined cases of
the oil gathering systems
SGTPIPE / SGTFLOW can be effectively used to simulate
of complex on-shore pipeline networks (including
elevation and/or high gas-liquid ratio cases)
The study results were discussed during BP Pipeline Systems Team
technical meetings and accepted by them.
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