适用于全流型域全倾角范围的井筒漂移流关系  

Wellbore drift flow relation suitable for full flow pattern domain and full dip range

作　　者：娄文强 王志远[1,2] 李鹏飞 孙小辉 孙宝江[1] LIU Yaxin 孙大林 LOU Wenqiang;WANG Zhiyuan;LI Pengfei;SUN Xiaohui;SUN Baojiang;LIU Yaxin;SUN Dalin(School of Petroleum Engineering,China University of Petroleum(East China),Qingdao 266580,China;Key Laboratory of Unconventional Oil&Gas Development,Ministry of Education,China University of Petroleum,Qingdao 266580,China;Department of Petroleum Engineering,University of Tulsa,Tulsa 74104,United States)

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]中国石油大学(华东)非常规油气开发教育部重点实验室,山东青岛266580 [3]塔尔萨大学石油工程学院,美国塔尔萨74104

出　　处：《石油勘探与开发》2022年第3期605-615,共11页Petroleum Exploration and Development

基　　金：国家自然科学基金重大项目(51991363);国家自然科学基金面上项目(51974350);青年长江学者奖励计划(Q2016135);教育部创新团队项目(IRT_14R58)。

摘　　要：针对定向井、大位移井等复杂结构井溢流过程及压井作业过程中的井筒多相流动模拟问题,建立了包括32个不同数据源共3561组实验数据的数据库,考虑流体黏度、管道尺寸、界面张力、流体密度、管道倾角等因素对多相流动参数的影响,开发了一种新的适用于全流型域全倾角范围的气液两相漂移流关系。采用理论分析和数据驱动的方式建立了管道倾角为−90°~90°条件下的分布系数和气体漂移速度模型,并与3个现有模型进行对比,发现其预测准确率最高、性能最稳定。选取现场压回法压井案例对漂移流模型在管道倾角为−90°~80°的流动工况下的适用性进行了分析,结果表明关井套压计算误差为2.58%,初始压回套压模拟误差为3.43%,调整排量时的套压误差为5.35%,模型的计算结果与现场压回数据吻合度较高。Aiming at the simulation of multi-phase flow in the wellbore during the processes of gas kick and well killing of complex-structure wells(e.g.,directional wells,extended reach wells,etc.),a database including 3561 groups of experimental data from 32 different data sources is established.Considering the effects of fluid viscosity,pipe size,interfacial tension,fluid density,pipe inclination and other factors on multi-phase flow parameters,a new gas-liquid two-phase drift flow relation suitable for the full flow pattern and full dip range is established.The distribution coefficient and gas drift velocity models with a pipe inclination range of−90°-90°are established by means of theoretical analysis and data-driven.Compared with three existing models,the proposed models have the highest prediction accuracy and most stable performance.Using a well killing case with the backpressure method in the field,the applicability of the proposed model under the flow conditions with a pipe inclination range of−90°-80°is verified.The errors of the calculated shut in casing pressure,initial back casing pressure,casing pressure when adjusting the displacement are 2.58%,3.43%,5.35%,respectively.The calculated results of the model are in good agreement with the field backpressure data.

关 键 词：井筒压力控制 井筒多相流动 漂移流模型 气体漂移速度 分布系数 

分 类 号：TE28[石油与天然气工程—油气井工程]