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<p>With the transformation of China’s energy structure, the share of natural gas in primary energy consumption continues to grow. As a major unconventional gas type, coalbed methane (CBM) combines the resource potential of coal seam gas with the development efficiency of shale gas. However, complex geological conditions and high costs make economic efficiency a key challenge. This study examines 28 CBM wells in the Mizhi and Suide blocks of the Changqing Oilfield, analyzing cost structure and efficiency from the perspectives of cost input and economic output. Using the entropy weight method, the study identifies key cost factors-well testing technical services and fracturing materials-which together account for nearly 80% of total costs. The DEA-BCC and non-radial super-efficiency SBM models are then applied to evaluate economic efficiency. Results show that only four wells achieve DEA strong efficiency, while about 82% have comprehensive efficiency below 0.5, indicating generally low resource utilization. To address these issues, the paper proposes a “weight-driven, efficiency-oriented” cost management framework emphasizing standardized service lists, cost caps, and differentiated technical optimization based on geological conditions. The findings provide a quantitative basis for refined cost management and investment decisions, supporting the high-efficiency and low-carbon development of CBM.</p>

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Economic Benefit Evaluation of Coalbed Methane Wells Based on DEA Model

  • 期刊论文

  • 发表日期：

    2026年6月24日

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  • Lijun Zhang,
  • Wenjie Su,
  • Yijun Fan,
  • Yan Ma,
  • Zhongliang Yu,
  • Xin Meng,
  • Hengji Zhang

摘要

With the transformation of China’s energy structure, the share of natural gas in primary energy consumption continues to grow. As a major unconventional gas type, coalbed methane (CBM) combines the resource potential of coal seam gas with the development efficiency of shale gas. However, complex geological conditions and high costs make economic efficiency a key challenge. This study examines 28 CBM wells in the Mizhi and Suide blocks of the Changqing Oilfield, analyzing cost structure and efficiency from the perspectives of cost input and economic output. Using the entropy weight method, the study identifies key cost factors-well testing technical services and fracturing materials-which together account for nearly 80% of total costs. The DEA-BCC and non-radial super-efficiency SBM models are then applied to evaluate economic efficiency. Results show that only four wells achieve DEA strong efficiency, while about 82% have comprehensive efficiency below 0.5, indicating generally low resource utilization. To address these issues, the paper proposes a “weight-driven, efficiency-oriented” cost management framework emphasizing standardized service lists, cost caps, and differentiated technical optimization based on geological conditions. The findings provide a quantitative basis for refined cost management and investment decisions, supporting the high-efficiency and low-carbon development of CBM.