南海张力腿平台气隙计算方法

摘要

气隙是张力腿平台性能的重要指标之一.通过对张力腿平台气隙设计要求及影响因素进行分析,给出了张力腿平台气隙预报模型.以流花16-2油田为例,结合张力腿平台前端工程设计研究项目,采用气隙简化估算公式、数值模拟和模型试验相结合的方法进行了气隙计算.计算结果表明,在前期工程设计或初步设计时,可采用本文给出的简化估算公式快速计算气隙,对于最终设计气隙,建议以数值模拟和模型试验相结合的方法来确定.本文提出的张力腿平台气隙设计方法可为南海今后类似张力腿平台设计提供借鉴.%Airgap is one of the important parameters for tension leg platforms (TLPs).Based on the investigation of the TLP airgap design criteria and the influencing factors,an airgap prediction model was derived.Combining the front engineering research project,this paper presents a case study carried out for Liuhua 16-2 TLP FEED project in South China Sea,and the airgap was calculated by combining the simplified estimation formula,the numerical analysis,and model tests.The results demonstrate that the simplified method for airgap calculation presented here can be utilized during early or preliminary stage of TLP design;however,for the final design,the model test is highly recommended in conjunction with the numerical calculations.The airgap design methodology presented in this paper can be applied in future TLP projects in South China Sea.