With the development of oilfields, formation energy gradually decreases and the efficiency of pumping wells also declines. Most pumping wells need to adopt intermittent pumping to reduce ineffective energy consumption and increase oil well utilization. However, due to the complex geological conditions of pumping wells and varying fluid supply capabilities of formations, the choice of appropriate pumping wells for intermittent pumping is crucial for the formulation of pumping schemes and the effect of intermittent pumping. This study analyzed and screened out 26 oil well-related factors from three aspects: reservoir and fluid, production dynamics, and artificial lift design. Then, the fuzzy comprehensive evaluation method was introduced, and the weight coefficients of each index were determined based on the weight calculation formula, thus establishing a comprehensive evaluation model for selecting pumping wells for intermittent pumping. Based on the comprehensive evaluation model, 152 intermittent pumping charts were drawn. Finally, some oil wells in the oilfield were selected as examples to further verify the feasibility of the model. The case analysis showed that the established comprehensive evaluation model for selecting pumping wells for intermittent pumping can provide clear selection guidance for low-yield wells by comprehensively determining whether the wells need intermittent pumping based on the integration of factors in three aspects: reservoir and fluid, production dynamics, and artificial lift design. The use of intermittent pumping charts for selecting pumping wells is concise and clear, bringing great convenience to oilfields.

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Research on the Method of Selecting Pumping Wells Based on Fuzzy Comprehensive Evaluation

  • Xi-shun Zhang,
  • Cai Wang,
  • Yi-zhen Sun,
  • Rui-dong Zhao,
  • Jun-feng Shi,
  • Xiao-jing Zeng,
  • Yu Li,
  • Han-jun Zhao,
  • Yan-wen Yu,
  • Gao-qiang Ma

摘要

With the development of oilfields, formation energy gradually decreases and the efficiency of pumping wells also declines. Most pumping wells need to adopt intermittent pumping to reduce ineffective energy consumption and increase oil well utilization. However, due to the complex geological conditions of pumping wells and varying fluid supply capabilities of formations, the choice of appropriate pumping wells for intermittent pumping is crucial for the formulation of pumping schemes and the effect of intermittent pumping. This study analyzed and screened out 26 oil well-related factors from three aspects: reservoir and fluid, production dynamics, and artificial lift design. Then, the fuzzy comprehensive evaluation method was introduced, and the weight coefficients of each index were determined based on the weight calculation formula, thus establishing a comprehensive evaluation model for selecting pumping wells for intermittent pumping. Based on the comprehensive evaluation model, 152 intermittent pumping charts were drawn. Finally, some oil wells in the oilfield were selected as examples to further verify the feasibility of the model. The case analysis showed that the established comprehensive evaluation model for selecting pumping wells for intermittent pumping can provide clear selection guidance for low-yield wells by comprehensively determining whether the wells need intermittent pumping based on the integration of factors in three aspects: reservoir and fluid, production dynamics, and artificial lift design. The use of intermittent pumping charts for selecting pumping wells is concise and clear, bringing great convenience to oilfields.