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Enhancing energy efficiency and sustainability in offshore drilling through real-time multi-objective optimization: Considering lag effects and formation variability

Author

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  • Song, Yu
  • Song, Zehua
  • Yang, Jin
  • Wei, Longgui
  • Tang, Jizhou

Abstract

Advancements in offshore drilling demand AI-driven solutions to handle unpredictable geological conditions and complex subsurface environments, ensuring reliability and sustainability. Traditional methods relying on historical well data lack accuracy and adaptability, while logging-while-drilling (LWD) causes delays that hinder timely decision-making and reduce operational resilience. To address these challenges, this study presents an AI-empowered real-time multi-objective optimization framework designed to enhance the reliability and efficiency of offshore drilling systems. By integrating time-series forecasting networks, domain adversarial networks, and Markov decision processes, the framework accurately predicts the rate of penetration (ROP) and formation physical properties in real time despite limited data. Perceiving formation pressure gradients to constrain mud density adjustments and incorporating an online learning strategy enable adaptation to diverse geological environments, enhancing decision support. The double parameter optimization actor-critic (DPOAC) algorithm facilitates real-time adjustments, boosting operational efficiency and infrastructural reliability. Empirical analysis in the Caofeidian 6-4 block of the Bohai Sea, China, demonstrates significant improvements: ROP increased from 58.76 m/hr to 210.81 m/hr, mechanical specific energy reduced from 11.42 MPa to 10.01 MPa, and unit cost per meter decreased from 18,439 CNY/m to 2,852 CNY/m. These results validate the framework's effectiveness in enhancing the sustainability and resilience of offshore drilling operations.

Suggested Citation

  • Song, Yu & Song, Zehua & Yang, Jin & Wei, Longgui & Tang, Jizhou, 2025. "Enhancing energy efficiency and sustainability in offshore drilling through real-time multi-objective optimization: Considering lag effects and formation variability," Reliability Engineering and System Safety, Elsevier, vol. 261(C).
    • Handle: RePEc:eee:reensy:v:261:y:2025:i:c:s0951832025003394
    DOI: 10.1016/j.ress.2025.111138
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    2. Antonius Setyadi & Suharno Pawirosumarto & Alana Damaris, 2025. "Sustainable Operations Strategy in the Age of Climate Change: Integrating Green Lean Practices into Operational Excellence," Sustainability, MDPI, vol. 17(13), pages 1-36, June.

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