| 摘要: |
| 地下水封石油洞库被认为是一种有效的储油技术，通常使用人工水幕系统来保持稳定的地下水位，防止储存产品泄漏。洞室内的油气压力会影响地下水渗流场，在洞室附近产生一定范围的油气泄漏区，对洞室涌水量和油气泄漏产生影响，合理控制油气压力对保证地下油库水封功能和储油库长期稳定运行至关重要。本文采用有限元数值模拟方法，依托我国某石油储备地下水封洞库工程，开展了在不同油气压力下水封石油洞库储油运行期的油气泄漏及洞室涌水量演变的模拟研究。研究结果表明：油气压力会对渗流场产生影响,油气压力的增加可以扩大油气泄漏区，提高地下水位，降低洞室涌水量，降低生产成本。但随着油气压力的增大，油气泄漏范围增大且泄漏量增加，当油气压力超过0.2MPa时，油气迅速泄漏，漫延至水幕孔，最终泄漏至地下水位，导致大量油气在地表附近聚集并进入大气，对环境产生严重污染。通过本文算例研究，认为当油气压力为0.2MPa时，洞库不发生油气泄露且涌水量控制最为经济合理。 |
| 关键词: 水幕系统 油气压力 油气泄漏 涌水量 两相流 |
| DOI： |
| 分类号:TV21 |
| 基金项目:国家自然科学基金面上资助项目(51874207);山西省自然科学基金资助项目（202303201211042，202303011222006） |
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| Influence of oil vapor pressure on seepage field of underground water-sealed oil caverns |
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hanfuzhi, xibaopong, dongyunsheng, zhaowenzhuo, caijiahao, fanqinag
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Taiyuan University of Technology
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| Abstract: |
| Underground water-sealed oil caverns are recognized to be an effective oil storage technology, typically employing artificial water curtain systems to maintain a consistent water level and prevent product leakage. The pressure within the cavern for oil vapor storage influences the seepage field of subterranean water and and generate a defined zone of oil vapor intrusion in the vicinity of the cavern, which impacts the water inflow and oil vapor leakage within the cavern. Adequate management of the oil storage pressure is imperative to safeguard the integrity of the subterranean water seal and and the prolonged functionality of the oil storage facility. To ascertain the optimal oil vapor storage pressure, finite element numerical simulations were employed to model the gas leakage dynamics and the variation in water inflow in a water-sealed oil storage cavern under varying storage pressures. The findings demonstrate that an increased oil vapor storage pressure can expand the gas intrusion zone, raise the water table, reduce the water inflow within the cavern, and may potentially reduce production costs. However, increased oil vapor storage pressures lead to a broader leakage area and greater volumes of oil vapor leakage. When the storage pressure exceeds 0.2MPa, the oil vapor leakage spreads rapidly, extends to the water curtain hole, and ultimately seeps into the groundwater level, resulting in a large amount of oil vapor accumulating near the surface and entering the atmosphere, leading to serious environmental pollution. The case mentioned in this paper is the most economical and reasonable when the oil pressure is 0.2MPa to control the oil leakage and the water inflow in the cavern. |
| Key words: Water curtain system Oil vapor pressure Oil vapor leakage water inflow two-phase flow |
