基于序贯模块法的天然气乙烷回收工艺参数优化

Optimization of ethane recovery process parameters of natural gas based on sequential modular approach

随着乙烷产品价值的进一步提升,国内各大油田正大力开展天然气乙烷回收,以提高油田的综合收益。以克拉美丽气田天然气乙烷回收工艺为例,基于序贯模块法建立了天然气乙烷回收系统模型;求解得到该系统的模拟顺序后,采用HYSYS软件建立了计算模型,分析了乙烷回收工艺中各关键参数的影响,并基于?分析方法对该乙烷回收系统进行了评价;最后,以乙烷产品最小比功耗为目标函数,采用序列二次规划(SQP)优化方法对乙烷回收工艺参数进行了优化。结果表明:采用序贯模块法模拟天然气乙烷回收系统具有较好的适用性;经参数优化后,乙烷收率由92.62%提高到97.01%,乙烷产品比功耗降低了约5.4%。

With the further improvement of the value of ethane,major domestic oilfields are vigorously carrying out natural gas ethane recovery to improve the comprehensive return of oilfields.Taking Kelameli gas field as an example,the simulation model of natural gas ethane recovery system was established based on sequential module approach.After solving the simulation sequence of the system,the calculation model was established by HYSYS software to analyze the influence of key parameters in ethane recovery process,and the ethane recovery system was evaluated based on exergy analysis method.Finally,taking the minimum specific power consumption of ethane product as the objective function,the ethane recovery process parameters were optimized by sequential quadratic programming(SQP)optimization method.The results show that the sequential modular approach is suitable for the simulation of natural gas ethane recovery system and after parameter optimization,the yield of ethane is increased from 92.62%to 97.01%,and the specific power consumption of ethane product is reduced by about 5.4%.