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Evaluation of Factors Influencing Energy Consumption in Water Injection System Based on Entropy Weight-Grey Correlation Method

Ruan Yan
Ruan Yan
, 
Wu Tong
Wu Tong
, 
Chen Jiaona
Chen Jiaona
, 
Hassan A. Alteraz
Hassan A. Alteraz
 und 
Hamdy M. Mohamed
Hamdy M. Mohamed
   | 10. Nov. 2021
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Online veröffentlicht: 10. Nov. 2021
Seitenbereich: 269 - 280
Eingereicht: 23. Feb. 2021
Akzeptiert: 29. Mai 2021
DOI: https://doi.org/10.2478/amns.2021.2.00044
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© 2021 Ruan Yan et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Fig. 1

Structure of water injection system.
Structure of water injection system.

Fig. 2

Energy flow diagram of water injection system.
Energy flow diagram of water injection system.

Fig. 3

Influencing factors of energy consumption in water injection system.
Influencing factors of energy consumption in water injection system.

Weight of energy consumption index of an oilfield water injection system.

Energy consumption index Entropy weight Weight rank
C1 0.0000160 6
C2 0.9831032 1
C3 0.0060623 3
C4 0.0010549 4
C5 0.0096778 2
C6 0.0000752 5
C7 0.0000105 7

Grey correlation coefficient of an oilfield water injection system.

Energy consumption index System I System II System III System IV System V
C1 0.9621 0.9922 0.9337 0.9922 0.9168
C2 0.9258 0.9166 0.8064 0.9883 0.9502
C3 0.9997 0.4669 0.9244 0.9186 0.9297
C4 0.9848 0.3385 0.9985 0.9969 0.9977
C5 0.9996 0.3615 0.9813 0.9935 0.9856
C6 0.9914 0.3447 0.9881 0.9761 0.9996
C7 1.0000 0.3334 0.9999 0.9997 0.9994

Energy consumption index system for water injection system.

System link Energy loss node Energy consumption index Test parameter
Pump A1 Engine loss B1 Power factor C1 Active power D1, reactive power D2, power factor D3
Water injection pump loss B2 Unit efficiency C2 Pump inlet pressure D4, outlet pressure D5, outlet flow D6
Differential pressure loss of pump line B3 Differential pressure of pump line C3 Station outlet pressure D6
Pipe network A2 Trunk loss B4 Trunk pressure loss C4 Truck pressure D8
Throttling loss of water distributing station B5 Valve control of water distributing station C5 Oil pressure of water distributing station D9
Single-well pipeline loss B6 Single-well pipeline pressure loss C6 Wellhead pressure D10
Wellhead loss B7 Wellhead valve control C7 Wellhead flow D11

Basic information of an oilfield water injection system.

Research system Water injection qty/m3/d System efficiency/% Water injection well/head Pump unit/set
System(Optimal) 8925.36 67.01 61 4
System I 19247.76 49.44 108 7
System II 3924.00 63.01 47 3
System III 7995.26 67.48 55 4
System IV 15826.08 42.85 83 6
System V 5216.40 46.92 36 5

Energy consumption index of an oilfield water injection system.

Energy consumption index System (Optimal) System I System II System III System IV System V
Power factor C1 0.93 0.83 0.95 0.75 0.91 0.70
Pump unit loss C2/% 20.18 15.26 14.59 34.92 20.91 16.96
Differential pressure of pump line C3/% 4.14 4.15 1.95 2.01 1.83 6.11
Trunk pressure loss C4/MPa 0.39 1.57 2.18 0.51 0.15 0.57
Valve control pressure loss C5/MPa 3.42 3.39 7.73 2.00 2.93 2.33
Single-well pipeline pressure loss C6/MPa 0.22 0.43 0.67 0.51 0.81 0.21
Wellhead valve control C7/% 0.00 0.01 0.22 0.02 0.07 0.13

Grey correlation degree of water injection system in an oil field.

System I System II System III System IV System V
Relevancy r0j 0.9271 0.9078 0.8090 0.9879 0.9505
Rank 3 4 5 1 2
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Sprache:
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