基于漂移模型的气体溢流动态模拟  

Dynamic Simulation of Gas Well Overflow Based on Drift-flux Two-phase Flow Model

作　　者：王旭东[1] 陈平[1] 胡德云[2] 陈奕阳[3] 

机构地区：[1]西南石油大学“油气减地质及开发工程”国家重点实验室,四川成都610500 [2]中国石化西南石油工程有限公司钻井工程研究院,四川德阳618000 [3]西南石油大学石油工程学院,四川成都610500

出　　处：《西南石油大学学报（自然科学版）》2013年第5期118-122,共5页Journal of Southwest Petroleum University(Science & Technology Edition)

摘　　要：针对在目前工程上的溢流计算模型相对粗糙,不能准确地对溢流动态进行描述,模型和实际情况存在较大误差,溢流相关参数计算和现场相差过大,计算所提供的压井参数计算不准确,使得压井困难甚至失败等问题,以气液两相漂移模型作为基础模型来表征相间作用,以双流体模型来体现流动的动态情况,建立了溢流动态控制模型,并对模型进行了离散求解。使用现场实际资料分析了溢流时井筒中气相分数的变化规律,压井过程中含气段的长度与含气段位置的变化,最后使用模型对压井进行了模拟。结果表明,现场实测数据和模型计算结果较为吻合,模型对溢流动态进行描述较为准确。本模型为安全有效地井控提供了理论基础。The current engineering calculation models for well overflow are simple and cannot accurately describe the dynamic behavior, and the relevant parameters are not agreement with the actual situation. Thus, the parameters will make it difficult to kill well. Based on drift-flux two-phase flow model and the interaction of gas and liquid, the model has been established by two-fluid models to describe dynamic behavior of gas and liquid. The changes in the gas fraction of gas-liquid two-phase flow in annulus are analyzed. The length and position of gassy segment in annulus are analyzed when killing well. A Simulation of kill well is done using field data via which to validate the model. The simulation results show that the measured data and the model results are consistent. The model can describe accurately the dynamic of well overflow, which provides the theoretical foundation for the safe and effective well control.

关 键 词：溢流 漂移模型 两相流 双流体模型 井控 

分 类 号：TE28[石油与天然气工程—油气井工程]