77基于CFD的海上CO_(2)封存示范工程扩散模拟

Application of Dispersion Simulation Based on CFD in Offshore CO_(2)Storage Demonstration Project

针对南海原油处理平台项目CO_(2)气体扩散的影响问题,利用计算流体动力学(CFD)对平台的CO_(2)扩散进行模拟,通过CO_(2)扩散频率的叠加可以判断平台监测点遭受CO_(2)的侵入是否在可接受的范围之内。在生活区的入风口,CO_(2)的出现频率最高,在一个监测目标点的总频率(小、中、大场景)最大值分别为1.16×10^(-4)a^(-1)(5000×10^(-6))和2.28×10^(-5)a^(-1)(30000×10^(-6));当上层甲板的浓度为30000×10^(-6)时,总发生频率(小、中、大场景)的最高值为1.47×10^(-2)a^(-1);每种可能情景的最长持续时间为1 h,每周最大预期CO_(2)暴露时间为7.2 h/周;30000×10^(-6)LQ进气口的最大浓度频率为2.28×10^(-5)a^(-1)。所得结果对于CO_(2)封存优化设计和配置个人防护用品有一定的指导意义。

Aiming at the influence of CO_(2)gas diffusion in south China sea offshore oilfield platform project,computational fluid dynamics(CFD)was used to simulate the CO_(2)diffusion of the platform,and the superposition of CO_(2)diffusion frequency could determine whether the CO_(2)intrusion at the platform monitoring point was within an acceptable range.The frequency of CO_(2)was the highest at the air inlet in the living area,and the maximum total frequency(small,medium and large scenes)at a monitoring target point was 1.16×10^(-4)a^(-1)(5000×10^(-6))and 2.28×10^(-5)a^(-1)(30000×10^(-6)),respectively.When the concentration of the upper deck is 30000×10^(-6),the highest value of the total frequency(small,medium and large scenes)is 1.47×10^(-2)a^(-1);The maximum expected CO_(2)exposure per week was 7.2 h/week(4.27×10^(-2)168 h/week)for each possible scenario of 1 h;The maximum concentration frequency of the 30000×10^(-6)LQ inlet is 2.28×10^(-5)a^(-1).The results obtained have certain guiding significance for the optimal design and configuration of personal protective equipment for CO_(2)storage.