气侵条件下深水钻井井筒温压耦合场分布规律研究
Temperature and Pressure Coupling Field Distribution Law in Deepwater Drilling Wellbore under Gas Kick
王金铎 1王宴滨 1贺子磬 1高德利 1曾静2
作者信息
- 1. 石油工程教育部重点实验室(中国石油大学(北京)),北京 102249
- 2. 中国地质调查局广州海洋地质调查局,广东 广州 511458
- 折叠
摘要
在深水钻井中,气体侵入会对井筒内的温度和压力分布产生显著影响,进而对深水钻井作业带来安全风险.针对深水钻井中的气侵问题,考虑井筒内流体与地层、海水间的传热,建立了气侵条件下的深水钻井井筒温压耦合场计算模型,分析了气侵条件下气液两相流对井筒温度场和压力场的影响,探讨了钻井液循环时间、气侵量、地层深度、海水深度以及钻井液排量等因素对井筒温度场和压力场的影响规律.研究发现:海水深度是影响深水井筒环空温度的主要因素,钻井液排量、地层深度是影响深水井筒环空温度的次要因素,钻井液循环时间与气侵量的影响最小;随着钻井液循环时间、气侵量和钻井液排量增加,井筒温度和压力都降低;随着地层深度增加,井筒温度和压力都升高;随着海水深度增加,井筒温度降低而压力升高.该研究结果对气侵条件下深水钻井井筒温压耦合场分布研究和深水钻井作业安全具有指导意义.
Abstract
Gas kick during deepwater drilling significantly affects the temperature and pressure distribution inside the wellbore,posing potential safety risks to deepwater drilling operations.To address the gas kick issue in deepwater drilling,the heat transfer among the fluid in the wellbore,the formation,and the seawater was considered,and the calculation model for the temperature and pressure coupling field in deepwater drilling wellbore under gas kick was established.The influence of gas-liquid two-phase flow on wellbore temperature and pressure fields under gas kick was analyzed.Additionally,the influence of factors such as drilling fluid circulation time,gas kick amount,formation depth,seawater depth,and flow rate of drilling fluid on wellbore temperature and pressure fields were explored.Results show that the seawater depth is the primary factor affecting the annular temperature of the deepwater wellbore.Drilling fluid flow rate and formation depth are secondary factors.The gas kick amount and circulation time of drilling fluid have the minimal impact.With the increase in the circulation time of drilling fluid,the gas kick amount and flow rate of drilling fluid,the wellbore temperature and pressure both decrease.With the increase in the formation depth,the wellbore temperature and pressure also rise.With the increase in the seawater depth,the wellbore temperature decreases,while the pressure increases.The results have a guiding significance for the temperature and pressure coupling field distribution in deepwater drilling wellbore and the safety of deepwater drilling operations.
关键词
深水钻井/气侵/井筒/温压耦合场/分布规律Key words
deepwater drilling/gas kick/wellbore/temperature and pressure coupling field/distribution law引用本文复制引用
出版年
2024
NETL
NSTL
万方数据