摘要
目前大部分关于海底原油管道泄漏特征的研究仅针对海面泄漏或海底垂向大口径泄漏,缺少对水平方向微孔原油泄漏特性的分析。基于此,开展管道水平方向泄漏实验,获得了在不同管内压力及不同泄漏孔径下原油到达水面的时间、泄漏量等数据。结合多相流及数值计算理论,建立了水下管道水平方向泄漏数值模型,仿真模拟了海流、原油密度、含气率等参数的变化对水下管道水平方向泄漏运动形态的影响。研究表明:海流流速越大,原油上升到水面的时间越长,且在水平方向漂移的距离也越大;在一定的泄漏孔径下,管内压力越大,泄漏量越大,原油在水平方向的运动时间也越长。研究结果可为处理管道泄漏事件提供理论支持。
The studies on the leakage characteristics of submarine oil pipelines mostly focus on the leakage at the sea surface or the large-aperture underwater vertical leakage. And the leakage characteristics of crude oil through micro-apertures in the horizontal direction are seldom analyzed. In this paper, therefore, horizontal leakage experiments were conducted to figure out the relationship between the flowing time of crude oil to the water surface and the leakage under different pipeline internal pressures and leakage apertures. Then, according to the multiphase flow and numerical calculation theories, a numerical model for the horizontal leakage of underwater pipelines was established to simulate the effects of parametric change(e.g. sea current, oil density and gas volume fraction) on the movement forms of horizontal leakage of underwater pipelines. It is indicated that the higher the sea current velocity, the longer the rising time of the oil to the water surface and the greater the distance of horizontal drift. For a constant leakage aperture, the higher the pipeline internal pressure, the greater the leakage and the longer the movement time of crude oil in the horizontal direction. The research results provide the theoretical basis for the treatment of pipeline leakage.
出处
《油气储运》
CAS
北大核心
2018年第4期469-474,共6页
Oil & Gas Storage and Transportation
基金
福建省自然科学基金资助项目"海底油气混输管道泄漏及泄漏而产生的油气输运规律的模拟"
2014J01201
关键词
海底管道
泄漏量
海流
密度
含气率
submarine pipelines
leakage
sea current
density
gas content
