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10/10/2014
1
REGIONAL ASSOCIATION OFOIL, GAS & BIOFUELS SECTOR COMPANIES
IN LATIN AMERICA AND THE CARIBBEAN
Integrated Model for Compression Visualization in
Gas-Condensate FieldsPeru
Carlos Bilbao.
Repsol Exploración Peru.
86th ARPEL Experts Level Meeting (RANE) “Management of Reservoirs”
October 6-7, 2014 – Buenos Aires, Argentina.
86th ARPEL Experts Level Meeting (RANE) “Management of Reservoirs“ – October 6-7 – Buenos Aires, Argentina 2
Gas & condensate fields located in the sub Andean Peruvian
rain forest, Madre de Dios basin.
The largest distance from well to processing plant is 95.5 km.
The average pressure drop 10 psi/Km.
Harsh logistic area, fluvial and heli-transported operation.
Weather window from december to march.
INTRODUCTION
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86th ARPEL Experts Level Meeting (RANE) “Management of Reservoirs“ – October 6-7 – Buenos Aires, Argentina 3
Asset Description
FIELD “M”
PAD “S1”PAD “S2”
PAD “K”
LOGISTIC
BASE
SPLITING
POINT
PROCESSING PLANT
86th ARPEL Experts Level Meeting (RANE) “Management of Reservoirs“ – October 6-7 – Buenos Aires, Argentina
Asset Description
4
2 PLANNED WELLS
(PAD S2)
THIRD PARTY FACILITIES
FLOWLINE 16’’
7 Km
SHARED FLOWLINE 18’’
42.5 Km
Cryogenic Plant
FLOWLINE 14”
10 Km
FLOWLINE 16”
14 KmFLOWLINE 16”
22 Km
BLOCK AA
FLOWLINE 8”
8 Km
FUTURE
LOOP 20”
THIRD PARTY
FIELD “P”
FIELD “M”(3 PRODUCER WELLS)
APPRAISAL WELL ATA
(PAD S1)
3 PRODUCER WELLS
(PAD K)
COMPRESSION
PLANT
LOGISTIC BASE
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86th ARPEL Experts Level Meeting (RANE) “Management of Reservoirs“ – October 6-7 – Buenos Aires, Argentina 5
INTEGRATED MODEL
RESERVOIRS B-AA (ECLIPSE 300):Compositional Model (14 components, includes water)
152x26x84m, 266448 cells, 6 Kr sets, 4 EOS - PR.
RESERVOIRS FIELD “M” (MBAL):Compositional Model (14 components, includes water)
WELL & SURFACE NETWORK (GAP):Well model uses VLP curves built using its mechanical
configuration and data from PDHG and WH.
Surface flowlines uses VLP curves built using Petroleum
Experts 4 mechanistic calculation.
COMPRESSION MODELS (HYSYS):Considering limits for Pout/Pin=3 and maximum temperature
300 °F.
The power calculated is the hydraulic power.
PROCESSING PLANT(HYSYS):Cryogenic plant, which products are Dry Gas and Natural Gas
Liquids.
REPORT (MS EXCEL)Given that Hysys do not save the solution each time step, then
results from compression models are saved within a Excel file.
RESOLVE
86th ARPEL Experts Level Meeting (RANE) “Management of Reservoirs“ – October 6-7 – Buenos Aires, Argentina 6
RESERVOIR
����� � ���
� �� � �
Where "a" is the turbulence coefficient and
"b" is the laminar flow coefficient, both can be
calculated from reservoir properties or, as in
this case is determined from a multi-rate test.
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
0 10 20 30 40 50 60 70 80 90 100
Pr/
Pi
RECOVERY FACTOR (%)
Pr/Pi vs RF
RF
COMPRESSION
NO COMPRESSION
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
0 10 20 30 40 50 60 70 80 90 100
Pr/
Pi
RECOVERY FACTOR (%)
Pr/Pi vs RF
RF
COMPRESSION
NO COMPRESSION
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86th ARPEL Experts Level Meeting (RANE) “Management of Reservoirs“ – October 6-7 – Buenos Aires, Argentina
CORRELATION BRIEF DESCRIPTION
Begs & BrillPrimarily used for pipelines, over-predict pressure
drop in vertical and deviated wells.
Fancher BrownNo-slip Hold-up correlation, use as a quality
control.
Hagerdon BrownUsed for oil wells under moderate slug flow rates
(well loading poorly predicted), not suitable for
mist flow neither condensates.
Wallis & GriffithDeveloped Flow Regime boundaries, Suitable for
Bubble flow.
Duns & RosSuitable for mist flow and high GOR oil and
condensate wells.
Petroleum Experts
Bubble Flow: Wallis and Griffith
Slug Flow: Hagerdon Brown
Transition flow: Duns & Ros
Annular Mist Flow: Duns & Ros
PE2 PE + low rate VLP
PE3 PE2 + Features for viscous, volatile and foamy oils.
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WELL MODEL
Petroleum Experts 2 & 3
86th ARPEL Experts Level Meeting (RANE) “Management of Reservoirs“ – October 6-7 – Buenos Aires, Argentina 8
NETWORK MODEL
LOCATIONGAS RATE
(MMSCFD)
Real
Pressure
(psig)
Model
Pressure
(psig)
error
PAD A 130 2052 2060 0.4%
PAD M 160 1964 1982 0.9%
LOGISTIC
BASE290 1905 1922 0.9%
SPLITING
POINT160 1412 1420 0.6%
FIELD P 360 1280 1270 -0.8%
HPS 160 1320 1320 0%
INLET PLANT
PRESSURE CONTROL
CHOKE %
RATE CONTROL
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86th ARPEL Experts Level Meeting (RANE) “Management of Reservoirs“ – October 6-7 – Buenos Aires, Argentina 9
COMPRESSION
Input data
Calculated values
86th ARPEL Experts Level Meeting (RANE) “Management of Reservoirs“ – October 6-7 – Buenos Aires, Argentina
RESULTS
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GU
0
250
500
750
1000
1250
1500
1750
2000
2250
2014
2016
2018
2020
2022
2024
2026
2028
2030
2032
2034
2036
2038
2040
2042
PR
ES
SU
RE
(p
sig
)
Date
COMPRESSION PRESSURE
DISCHARGE
B-AA INLET
FIELD M INLET
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86th ARPEL Experts Level Meeting (RANE) “Management of Reservoirs“ – October 6-7 – Buenos Aires, Argentina
RESULTSG
U
0
250
500
750
1000
1250
1500
1750
2000
2250
2014
2016
2018
2020
2022
2024
2026
2028
2030
2032
2034
2036
2038
2040
2042
PR
ES
SU
RE
(p
sig
)
Date
COMPRESSION PRESSURE
DISCHARGE
B-AA INLET
FIELD M INLET
86th ARPEL Experts Level Meeting (RANE) “Management of Reservoirs“ – October 6-7 – Buenos Aires, Argentina
CONCLUSIONS
12
And integrated Model which can represent the complete production system was built and
validated to estimate compression power demand.
The compression demand start on Q3-2016.
The first scenario evaluated, where the production from field M and Block AA go to the same Slug
catcher, is identified not the most efficient scenario, because both fields have to reach different
committed production plateaus, then the pressure controlled in the chokes, to reach the desired
production rates, needs to be restored by the compression; therefore, increasing power demand.
To overcome this disadvantage, it was evaluated the use of separated slug catchers, then
controlling the production of each field properly at chokes and reducing operating cost. This
represent 10% less power consumption compared to the first scenario. Another advantage of this
scenario is that the compressors released from Field M can be further utilized by Block AA, which at
the beginning has low compression power demand.
The total compression power demand lies between 20-25 Khp.
Taking into account economical analysis, around 30 % of capital investment can be saved if joint
compression is given.
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