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针对中国某海域封存海管湿气投产过程中潜在的水合物形成风险,利用HYSYS软件,模拟分析其相平衡与水合物形成条件;利用PIPEPHASE软件,模拟分析海管沿程湿气的压力和温度分布;采用静态模拟实验方法,测试分析模拟湿气水合物形成速度;对比分析数值模拟与实验模拟结果,评价海管内水合物形成的可能性,提出海管湿气投产的安全保障措施,确保海管湿气投产的顺利实施。结果表明:若海管不采取加注抑制剂或保温等防护措施,在4~6 MPa的湿气投产过程中理论上会形成水合物,凝析油有助于抑制水合物的形成,海管沿线湿气压力随海底起伏而波动,但全线压力损失不大,管内湿气温度很快降至环境温度;模拟实验证实了数值模拟结果的准确性与可靠性,通过采用合理的投产方案,加注乙二醇等措施可确保投产安全。
Aiming at the risk of potential hydrate formation during the operation of sealed marine moisture in a certain sea area of China, the phase equilibrium and hydrate formation conditions were modeled by HYSYS software. The pressure and temperature of the moisture along the pipeline were simulated and analyzed by PIPEPHASE software Distribution; static simulation test method to test and analyze the formation of moisture hydrate formation rate; comparative analysis of numerical simulation and experimental simulation results to evaluate the possibility of hydrate formation in the sea, put forward the safety and security measures to put into operation the production of moisture Tube moisture put into operation smoothly. The results showed that hydrate could be theoretically formed during the process of 4 ~ 6 MPa moisture production if the seawater did not take protective measures such as filling inhibitor or heat preservation. Condensate oil could help to suppress the hydrate formation. Moisture pressure fluctuated with the fluctuation of seafloor, but the pressure loss across the line was not large, and the temperature of the moisture in the pipe quickly dropped to ambient temperature. The simulation results confirmed the accuracy and reliability of the numerical simulation results. By adopting a reasonable production plan, Glycol and other measures to ensure the safety of production.