Abstract
Abstract In order to determine the importance of influencing factors of energy consumption in oilfield water injection systems, the distribution of energy loss in the water injection system was analyzed, the factors affecting the energy consumption of the water injection system were determined, and an evaluation index system for the energy consumption of the water injection system was established. This indicator system covers all links and all energy loss nodes of the energy loss of the water injection system, thereby an evaluation model for influencing factors of energy consumption in water injection system based on entropy weight - grey correlation method was built. Use the entropy weight method to get the ranking of the importance of energy consumption indicators; use the gray correlation method to determine the correlation between each water injection system and energy consumption factors. The application results show that the entropy weight-grey correlation method proposed in this paper can effectively obtain the importance of the energy consumption factors of the oilfield water injection system, and provide scientific guidance for the daily management and targeted optimization of the water injection system.
Highlights
Oilfield water injection is an important means to replenish energy into strata in oilfield development process so as to improve oilfield recovery ratio [1]
Researches on the influencing factors and evaluation of water injection system energy consumption including: Peng et al studied methods to improve the operation efficiency of water injection systems, and the influencing factors of energy consumption, and established an oilfield water injection system optimization control mathematical model [4]; Lei et al established a comprehensive evaluation model for ground systems and digital dynamic statistics [5]; Zhou et al established a reasonable index system and evaluation method that reflect the energy efficiency of the water injection system according to the characteristics of Xinjiang oilfields[6]; Tan et al established an energy consumption model using association rules and chaotic time series, and studied the relationship between energy consumption factors in the water injection system [7] and so on
The entropy weight-grey correlation analysis method has been applied in many fields, and has achieved good analysis and evaluation results, but it has not been applied in the analysis of the importance of the energy consumption factors of the oilfield water injection system
Summary
Oilfield water injection is an important means to replenish energy into strata in oilfield development process so as to improve oilfield recovery ratio [1]. The entropy weight-grey correlation analysis method has been applied in many fields, and has achieved good analysis and evaluation results, but it has not been applied in the analysis of the importance of the energy consumption factors of the oilfield water injection system. For this reason, this paper establishes a water injection system energy consumption evaluation index system, and uses the entropy weight-grey correlation method to determine the importance of the factors affecting the water injection system energy consumption
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