基于SA的盐穴储气库注气方案多目标优化
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长江大学

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TE822

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国家自然科学基金(51974033)、(52274060);长江人才计划领军人才项目(Yz2021239)资助


Multi-objective optimization of gas injection scheme for salt cavern storage based on SA
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Yangtze University

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    摘要:

    在天然气调峰中,储气库承担着重要的作用。在注气期间若注气方案分配的不合理不仅会导致完成注气任务时压缩机能耗过大,更可能导致部分单井压力变化过大,盐岩溶腔收敛加剧,影响储气库长期稳定运行。通过结合模拟退火算法和现场实际条件,综合考虑压缩机能耗和同一区块内所有储气井井口压力离散程度建立多目标优化函数,设置储气井任务期内注气量为变量,以管道最大设计压力,储气井最低运行压力和最高运行压力,配套的靶式流量计最大设计流量等作为约束条件进行多目标优化。结果表明压缩机功耗降低40%以上的同时地层压力标准差降低90%以上。可见能够通过该方法指导实际生产运行,为储气库长期稳定运行提供保障。

    Abstract:

    The role of gas storage in regulating natural gas peaks is crucial. Improper allocation of gas injection schemes during the injection process not only results in excessive energy consumption by compressors, but also leads to excessive pressure changes in certain individual wells and convergence of salt karst cavities, thereby affecting the long-term stable operation of gas storage. By combining the simulated annealing algorithm with actual field conditions, a multi-objective optimization function was established considering both compressor energy consumption and dispersion degree of wellhead pressures across all gas storage wells within the same block. The variable for this optimization was set as the gas injection volume during the task period for each gas storage well, while variables such as maximum design pressure of pipelines, minimum operating pressure, and maximum operating pressure of gas storage wells were taken into account. Additionally, constraints were imposed based on the maximum design flow rate measured by target flowmeters for multi-objective optimization purposes. Results indicate that compressor power consumption can be reduced by over 40% and formation pressure differences can be decreased by more than 90%. It is evident that this scheme provides assurance for ensuring long-term stable operation of gas storage through effective guidance on actual production operations.

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徐刘伟,张引弟,鲁宇涛,等. 基于SA的盐穴储气库注气方案多目标优化[J]. 科学技术与工程, , ():

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  • 收稿日期:2024-04-03
  • 最后修改日期:2024-05-09
  • 录用日期:2024-05-22
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