深水气井清井放喷过程井筒气液流动型态模拟研究  

Simulation and Analysis of Gas-liquid Flow Pattern inDeepwater Gas Well Wellbore During Cleanup Process

作　　者：刘文远 吴仕强[1] 毕彩霞 刘德生 胡长朝 王莉莉[1] LIU Wenyuan;WU Shiqiang;BI Caixia;LIU Desheng;HU Changchao;WANG Lili(SINOPEC Petroleum Exploration and Production Research Institute,Beijing 102206,China)

机构地区：[1]中国石化石油勘探开发研究院,北京102206

出　　处：《北京石油化工学院学报》2023年第4期28-34,共7页Journal of Beijing Institute of Petrochemical Technology

基　　金：中国石油化工股份有限公司技术开发项目(320075;P21023)。

摘　　要：针对深水气井液气比变化剧烈的清井放喷过程,以井筒内部气液流动型态分布规律为目标,结合深水气井清井测试工况,开展了清井放喷瞬态数值仿真模拟与分析。结果表明:放喷后井口处和泥线处的温度呈现不同的温度变化特征,井口温度出现先降低后升高,而泥线处流温先升后降;低井口压力下井筒内更易出现段塞流、环状流,高井口压力下返排初期往往呈现泡状流,中后期逐渐转变为段塞和环状流型;同一放喷时刻,井身沿程也将呈现不同流型分布,井筒下部主要呈现泡状流、段塞流,中上部范围内主要为环状流型。Aiming at the process of well cleanup with the sharp change of liquid gas ratio in deepwater gas wells,combined with the well cleaning test conditions of deepwater gas wells,the transient numerical simulation and analysis of well cleaning are carried out for revealling the distribution characteristics of gas-liquid flow pattern in the wellbore.The results show that:(1)the temperature at the wellhead and mud line shows different temperature changes after blowout,the temperature of wellhead decreases first and then rises,while the flow temperature at the mud line rises first and then decreases.(2)The slug flow and annular flow are more likely to appear in the wellbore under low wellhead pressure.The flow in the early stage of backflow under high wellhead pressure tends to be bubble flow,and gradually changes into slug and annular flow pattern in the middle and later stage.(3)At the same time of blowout,the well body along the way will also show different flow patterns,and the lower part of the wellbore mainly presents bubble flow and slug flow,and the upper middle part is mainly annular flow.

关 键 词：深水气井 清井放喷 温度和压力 气液比 气液流型 

分 类 号：TE37[石油与天然气工程—油气田开发工程]