一体化思维提升海上天然气管网集输安全研究

Research on Improving the Safety of Offshore Natural Gas Pipeline Network Gathering and Transportation through Integrated Thinking

伴随海洋石油工业的不断发展,海上石油平台生产系统在一体化程度上不断增强。某海上A油气田拥有两个中心平台CEPA和CEPB,两个中心平台各有一套三甘醇脱水再生系统,脱水合格后的天然气汇合后一起通过海底管道输送至下游用户。然而在实际运行过程中,无论是三甘醇系统每年的计划性停运维护,还是随时可能的故障停运,都会存在气管网湿气外输的风险,在此期间油气田不得不向对应海管注入大量甲醇,不仅增加成本,更会给整个油气田安全生产带来严重风险。文章通过分析两个中心平台天然气系统关联性,利用一体化思维对天然气系统进行优化改造,实现三甘醇系统停运时,可保证最大程度的干气外输,为天然气管网的安全运行提供重要保证。

With the continuous development of offshore oil industry,the production system of offshore oil platforms has been increasingly integrated.An offshore oil and gas f ield A has two central platforms,CEPA and CEPB,and each of the two central platforms has a set of TEG dehydration and regeneration system.After dehydration,the qualif ied natural gas will be transported to downstream users through submarine pipelines.However,in the actual operation process,no matter the planned shutdown maintenance of the triethylene glycol system every year or the possible failure shutdown at any time,there will be a risk of wet gas transmission from the gas pipeline network.During this period,oil and gas f ields must inject a large amount of methanol into the corresponding sea pipelines,which will not only increase costs,but also bring serious risks to the safety production of the entire oil and gas f ields.In this paper,by analyzing the correlation between the natural gas systems of the two central platforms,the natural gas system is optimized and transformed using the integrated thinking,so that when the triethylene glycol system is shut down,the maximum dry gas transmission can be ensured,which provides an important guarantee for the safe operation of the natural gas pipeline network.