本文以某超深水完井修井船为研究目标，对其进行水动力分析，建立船体-钻修井立管耦合分析模型，根据规范建议对世界各主要海上油气产区的环境条件进行处理。在此基础上，对研究目标展开作业能力评估与作业概率分析。分析结果表明：该完井修井船能够满足温和海域的作业要求，在南中国海南部海域、西非海域、巴西海域作业概率较高，其在恶劣海域开展作业应有充足的技术分析与气象资料支持，以保证有足够的气候窗以完成相关作业。本文的相关分析方法可用于同类型以及其他海上工程作业船舶的作业能力评估。

Taking an ultra deep water well completion and workover ship as the research object， a method of its operation probability around main offshore oil and gas regions is studied based on hydrodynamic analysis in frequency and coupled analysis in time domain. The sea state in several offshore regions is studied and analyzed based on rules and codes recommendations. The analysis results show that the ultradeep water well completion workover ship can meet the operation requirements in mild sea areas， and has a relative high probability of operation in the sea areas of southern South China Sea， West Africa and Brazil. Its operation ability in severe sea areas should be studied based on detail technical analysis and metocean data， to ensure a sufficient operation weather window for well completion and workover operation. The analysis method in this paper can be used to evaluate the operation capacity of the same type and other offshore engineering vessels.