Optimal Design of Natural Gas Gathering Systems
273
Table 11. Operation parameters of unmodified compressor station case
CSs
Inlet pressure
(MPa)
Outlet pressure
(MPa)
Total power
(KW)
Configuration
(KW)
Running
numbers
2
2.43
4.51
360.01
470
1
5
4.58
4.58
0.00
630
0
20
4.89
4.89
0.00
630
0
21
3.08
5.03
988.21
630 630
2
22
5.19
5.19
0.00
630
0
24
5.23
5.23
0.00
630
0
25
3.42
5.25
909.30
1250 1250
1
objective functions: the operational and retrofitting cost of built CSs, the construction
cost of newly built pipelines, the construction and operation cost of newly built CSs.
A case based on data from a gas field in China is studied to demonstrate the effectiveness of the proposed method. The results show that this method can provide a reconstruction scheme of gathering pipeline network that performed better than the original
system. There is a 3.68% decrease in the total costs compared to the design scheme
without modification of the original CSs. The proposed method can be used as a tool
for decision support of the gas field pipeline design optimization in the mid to late
development stages.
Acknowledgments. This work was is supported by PetroChina Planning & Engineering Institute
“Study on Energy System Optimization Model of Gas Field Surface Engineering”. The authors
are grateful to all study participants.
Nomenclature
Indices and sets
I
represents the set of pipeline network nodes, denoted by the index i
C
represents the set of CSs, denoted by the index c
D
represents the set of pipeline diameters, denoted by the index d
Parameters
c g
refers to the power prices, CNY/(kw/h)
T
refers to the run time of the equipment, h
L i,j
refers to the distance between node i and node j, km
Life
the payback period of the compressors and pipeline, a
c P
d
refers to the pipeline construction cost of a pipeline sized d, CNY/km
Q i,j
refers to the flowrate of the gas transport in the pipelines, m3/h
273
Table 11. Operation parameters of unmodified compressor station case
CSs
Inlet pressure
(MPa)
Outlet pressure
(MPa)
Total power
(KW)
Configuration
(KW)
Running
numbers
2
2.43
4.51
360.01
470
1
5
4.58
4.58
0.00
630
0
20
4.89
4.89
0.00
630
0
21
3.08
5.03
988.21
630 630
2
22
5.19
5.19
0.00
630
0
24
5.23
5.23
0.00
630
0
25
3.42
5.25
909.30
1250 1250
1
objective functions: the operational and retrofitting cost of built CSs, the construction
cost of newly built pipelines, the construction and operation cost of newly built CSs.
A case based on data from a gas field in China is studied to demonstrate the effectiveness of the proposed method. The results show that this method can provide a reconstruction scheme of gathering pipeline network that performed better than the original
system. There is a 3.68% decrease in the total costs compared to the design scheme
without modification of the original CSs. The proposed method can be used as a tool
for decision support of the gas field pipeline design optimization in the mid to late
development stages.
Acknowledgments. This work was is supported by PetroChina Planning & Engineering Institute
“Study on Energy System Optimization Model of Gas Field Surface Engineering”. The authors
are grateful to all study participants.
Nomenclature
Indices and sets
I
represents the set of pipeline network nodes, denoted by the index i
C
represents the set of CSs, denoted by the index c
D
represents the set of pipeline diameters, denoted by the index d
Parameters
c g
refers to the power prices, CNY/(kw/h)
T
refers to the run time of the equipment, h
L i,j
refers to the distance between node i and node j, km
Life
the payback period of the compressors and pipeline, a
c P
d
refers to the pipeline construction cost of a pipeline sized d, CNY/km
Q i,j
refers to the flowrate of the gas transport in the pipelines, m3/h