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<p>Steel catenary riser represents the pioneering riser technology implemented in China’s deep-sea oil and gas operations. Given the complex mechanical conditions of the riser, extensive research has been conducted on its dynamic analysis and structural design. This study investigates a deep-sea oil and gas field by developing a coupled model of a semi-submersible platform and steel catenary riser to analyze it mechanical behavior under extreme marine conditions. Through multi-objective optimization methodology, the study compares and analyzes suspension point tension and touchdown point stress under various conditions by modifying the suspension position, suspension angle, and catenary length. The optimal configuration parameters were determined: a suspension angle of 12°, suspension position in the southwest direction of the column, and a catenary length of approximately 2000 m. These findings elucidate the impact of configuration parameters on riser dynamic response and establish reasonable parameter layout ranges for adverse sea conditions, offering valuable optimization strategies for steel catenary riser deployment in domestic deep-sea oil and gas fields.</p>

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Simulation and Optimization of Coupling Dynamic Response of Steel Catenary Riser for a Semi-Submersible Platform Under Harsh Conditions in the South China Sea

  • 期刊论文

  • 发表日期：

    2025年8月15日

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  • Qi-shuai Yin,
  • Xin-ye Yan,
  • Hong Zhu,
  • Ke-jin Chen,
  • Jin Yang,
  • Lu-yao Liu,
  • Bing-zhen Gao,
  • Ying-ying Guo,
  • Yong-qi Ma

摘要

Steel catenary riser represents the pioneering riser technology implemented in China’s deep-sea oil and gas operations. Given the complex mechanical conditions of the riser, extensive research has been conducted on its dynamic analysis and structural design. This study investigates a deep-sea oil and gas field by developing a coupled model of a semi-submersible platform and steel catenary riser to analyze it mechanical behavior under extreme marine conditions. Through multi-objective optimization methodology, the study compares and analyzes suspension point tension and touchdown point stress under various conditions by modifying the suspension position, suspension angle, and catenary length. The optimal configuration parameters were determined: a suspension angle of 12°, suspension position in the southwest direction of the column, and a catenary length of approximately 2000 m. These findings elucidate the impact of configuration parameters on riser dynamic response and establish reasonable parameter layout ranges for adverse sea conditions, offering valuable optimization strategies for steel catenary riser deployment in domestic deep-sea oil and gas fields.