首页|基于两相流的水封油库油气泄漏运移规律及控制措施

基于两相流的水封油库油气泄漏运移规律及控制措施

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地下水封油库运行的关键是保持一定的水封厚度,为确定合适的水封厚度,基于气液两相流理论,采用有限元数值模拟方法,以我国某石油储备地下水封洞库为依托,模拟了地下水封石油洞库储油运行期油气的泄漏运移演变过程.结果表明:施工期不设置水幕系统情况下,洞室顶部出现了大面积的疏干区,造成后期无法储油;设置水幕系统情况下,洞库上方能够维持一定水封厚度,洞库周围岩层油气泄漏范围和泄漏量均与储油运行时间呈正幂函数关系;水封厚度越大油气泄漏范围和泄漏量越小,但过大的水封厚度会大大增加工程成本,所对应的案例在水封厚度为30 m时对油气泄漏控制最为经济合理,《地下水封石洞油库设计标准》推荐的水封厚度合理且有一定安全裕度.研究成果可为水封油库工程的设计及油气泄漏控制提供一定理论参考.
Migration Law and Control Measures of Oil Vapor Leakage from Underground Oil Storage Cavern Based on Two Phase Flow
The key to the operation of underground water-sealed oil storage cavern is to maintain a certain thickness of water seal,which is dependent on the behavior of oil vapor migration under varying water seal depth.To deter-mine a proper water seal depth,we developed a finite element numerical simulation method based on gas-liquid two-phase flow theory to model the evolution process of oil vapor leakage from an underground water-sealed oil stor-age cavern in China during its operation.Results showed that in construction stage in the absence of water curtain system,a large drainage area at the top of the cavern made oil storage inoperable.However,the construction of a water curtain system enabled the maintenance of a certain thickness of water seal above the coal seam.The range and volume of oil vapor leakage in the surrounding rock displayed positive power function correlation with operation time,with smaller leakage range and volume observed at thicker water seals.However,excessively thick water seals greatly increased engineering costs.Our study suggests an economically and reasonably safe water seal thickness of 30 m,which meets recommended standards and provides a sound basis for water-sealed oil storage cavern design and oil vapor leakage control.

oil vapor leakageunderground water-sealed oil storage cavernstwo-phase flowwater curtain systemnumerical simulationthickness of water seal

唐栋、简回香、王存利、李毅、蒋中明

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长沙理工大学水利与环境工程学院,长沙 410114

长沙理工大学水沙科学与水灾害防治湖南省重点实验室,长沙 410114

油气泄漏 地下水封石油洞库 两相流 水幕系统 数值模拟 水封厚度

国家自然科学基金项目湖南省自然科学基金项目湖南省水利科技项目湖南省水利科技项目长沙理工大学研究生科研创新项目

521091122022JJ30606XSKJ2019081-53XSKJ2021000-25CX2021SS40

2024

10.11988/ckyyb.20221138

长江科学院院报
长江科学院

长江科学院院报

CSTPCD北大核心
影响因子：0.618
ISSN：1001-5485
年,卷(期)：2024.41(2)
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