摘要
随着油气开采不断向深海迈进,有必要对卧底管-悬链线立管中产生的严重段塞流现象进行深入研究。针对结构参数、生产参数多变的卧底管-悬链线立管集输系统,工程上缺少灵活、便捷、准确的判定严重段塞流产生的宏观理论模型。对卧底管采用分层流理论模型,着重考虑喷发阶段结束后的立管回流质量,结合漂移流速度模型,建立了卧底管-悬链线立管系统严重段塞流判定数学模型,将严重段塞流判定数学模型的判定结果与文献中的实验结果进行对比验证。结果表明,数学模型判定结果与实验结果吻合良好,可实现对卧底管-悬链线立管系统严重段塞流的产生进行宏观预判;同时对严重段塞流流型转换边界进行预测,分析了各流型间的转换特性。以现场卧底管-悬链线立管集输系统为例,预判某油田正常生产参数下将不会产生严重段塞流,并给出产生严重段塞流时的产液量及气液比范围。该模型的建立可为深海油气田开采过程中严重段塞流的宏观预判及预防提供理论依据,具有工程实际意义。
With the oil and gas exploitation stepping into the deep sea,it is necessary to deeply study the severe slug flow in the dinting-catenary riser. In view of the dinting-catenary riser gathering and transportation system with variable structural and production parameters, the project lacks a flexible,convenient and accurate macroscopic theoretical model in terms of judging severe slug flow. The stratified flow theoretical model is used for the dinting pipeline and the riser reflux mass after the period of eruption is mainly considered. Combined with the drift velocity model, a mathematic model of severe slug flow judgment for the dinting-catenary riser system is built,and the judgment results of the mathematic model and the experiment results in the literature are compared and verified. The result indicates that the results of the mathematic model are in good agreement with the experimental results. It can macroscopically predict severe slug flow in the dinting-catenary riser system. At the same time, it can predict the pattern transition boundary of serve slug flow, so as to analyze the transition characteristics of different flow patterns. Taking the field dinting-catenary riser gathering and transportation system for example, the model predicts that the oilfield will not produce slug flow under normal production parameters,and the liquid yield and gas liquid ratio range of severe slug flow are given. The establishment of the model provides a theoretical basis for the macro prediction and prevention of dinting-catenary riser in deep sea oil and gas field production process,which has actual engineering significance.
作者
王春生
蔡明钰
王新刚
安晓芳
WANG Chunsheng;CAI Mingyu;Wang Xingang;AN Xiaofang(Petroleum Engineering Department of Northeast Petroleum University;Education Ministry Key Laboratory of Enhanced Oil Recovery in Northeast Petroleum University;No.8 Oil Production Plant;Training Base of Training Centre (Party School) of Qinghai Oilfield)
出处
《油气田地面工程》
2019年第10期31-36,共6页
Oil-Gas Field Surface Engineering
