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The oil and gas sector relies heavily on natural gas, resulting in carbon-intensive energy structures. To achieve dual-carbon goals, a paradigm shift toward thermal energy storage (TES) systems powered by off-peak or renewable electricity is imperative. Replacing gas-fired heating with TES in natural gas production reduces grid electricity costs and enhances renewable energy integration. Additionally, this approach supports grid peak-shaving and improves energy conservation efficiency. Despite its potential, TES technology remains unexplored in gas field operations, necessitating systematic material screening and tailored technical solutions. This research developed an Analytic Hierarchy Process (AHP)-based evaluation model to assess seven commercial TES materials. A hierarchical judgment matrix was also established. The ranking incorporating economic and performance criteria: magnesium oxide (MgO) bricks > water > hydrated salts (phase change heat storage materials) > ternary molten salts (NaNO3-KNO3) > binary molten salts (NaNO3-KNO3-NaNO2) > paraffin > thermal oil was obtained. Scenario-specific TES solutions were subsequently designed for four critical heating applications in gas fields: Wellhead water-bath heaters can be replaced with water-based or hydrated salt phase-change TES systems. Purification plant boilers, light hydrocarbon plant thermal oil systems, and dehydration station reboilers are adaptable to magnesium oxide brick-based sensible heat storage. For a 50 kW wellhead water-bath heaters, the proposed solution demonstrates 48% operational cost reduction and over 88 t of CO2 mitigation annually, while reducing methane of 4.5 × 104 m3. As the first initiative to integrate TES technology into gas field operations, this study pioneers a gas-fired heating substitution framework leveraging off-peak/renewable electricity, addressing a critical industry gap.

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Evaluation of Thermal Energy Storage Materials for Gas Field Applications Using Analytic Hierarchy Process and Multi-scenario Heating Substitution Strategies

  • 章节

  • 发表日期：

    2026年

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  • Si-yu Wei,
  • Shao-mu Wen,
  • Jing Li,
  • Dong Lin,
  • Tian-qi Yue,
  • Qi-jun Dong,
  • Huan Wang,
  • Qi Wang,
  • Liang Zhao,
  • Guo-bin Jiang

摘要

The oil and gas sector relies heavily on natural gas, resulting in carbon-intensive energy structures. To achieve dual-carbon goals, a paradigm shift toward thermal energy storage (TES) systems powered by off-peak or renewable electricity is imperative. Replacing gas-fired heating with TES in natural gas production reduces grid electricity costs and enhances renewable energy integration. Additionally, this approach supports grid peak-shaving and improves energy conservation efficiency. Despite its potential, TES technology remains unexplored in gas field operations, necessitating systematic material screening and tailored technical solutions. This research developed an Analytic Hierarchy Process (AHP)-based evaluation model to assess seven commercial TES materials. A hierarchical judgment matrix was also established. The ranking incorporating economic and performance criteria: magnesium oxide (MgO) bricks > water > hydrated salts (phase change heat storage materials) > ternary molten salts (NaNO3-KNO3) > binary molten salts (NaNO3-KNO3-NaNO2) > paraffin > thermal oil was obtained. Scenario-specific TES solutions were subsequently designed for four critical heating applications in gas fields: Wellhead water-bath heaters can be replaced with water-based or hydrated salt phase-change TES systems. Purification plant boilers, light hydrocarbon plant thermal oil systems, and dehydration station reboilers are adaptable to magnesium oxide brick-based sensible heat storage. For a 50 kW wellhead water-bath heaters, the proposed solution demonstrates 48% operational cost reduction and over 88 t of CO2 mitigation annually, while reducing methane of 4.5 × 104 m3. As the first initiative to integrate TES technology into gas field operations, this study pioneers a gas-fired heating substitution framework leveraging off-peak/renewable electricity, addressing a critical industry gap.