基于EnKF的高温气井钻进中井筒传热模型研究  

Research on Wellbore Heat Transfer Model in Drillingof High Temperature Gas Wells Based on EnKF

作　　者：彭涛[1] 李白雪 钱会 王静[1] 张菲菲 PENG Tao;LI Baixue;QIAN Hui;WANG Jing;ZHANG Feifei(Petroleum Engineering Technology Research Institute,SINOPEC Jianghan Oilfield Company,Wuhan,Hubei 430030,China;Oil and Natural Gas Sales Branch,SINOPEC Jianghan Oilfield Company,Qianjiang,Hubei 433100,China)

机构地区：[1]中国石化江汉油田分公司石油工程技术研究院,湖北武汉430030 [2]长江大学石油工程学院,湖北武汉430100

出　　处：《西安石油大学学报（自然科学版）》2024年第6期130-139,共10页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家自然科学基金面上项目(51874045);湖北省教育厅科研计划项目(T2021004);湖北省科技计划项目(2019CFA093)。

摘　　要：深层气井钻进过程中,受到施工扰动和深层复杂地质条件的影响,现有方法很难准确描述井筒内的温压场变化。鉴于随钻实时监测和异常工况预警对精确描述温度场的迫切需求,使用集合卡尔曼滤波(Ensemble Kalman Filter,EnKF)和全井段传热分析相结合的方法,将实钻数据与传热模型融合同化,建立了一种适用于川西盆地高温气井井筒实时温度场监测和自修正分析的模型,并加以实例验证。结果表明:基于EnKF同化后的输出值及各项热温参数会随着测点迭代,修正结果逐渐精确。自修正技术在钻井井筒传热实时监测作业中的应用,提高了井下温压监测的准确度,可以满足更多钻井工况。During drilling of deep gas wells,it is difficult to accurately describe the temperature and pressure field changes in the wellbore by existing methods due to the influence of drilling disturbance and complex geology in deep formation.In view of the urgent need to accurately describe the temperature distribution in real-time monitoring of drilling conditions and early warning of abnormal conditions,a method combining Ensemble Kalman Filter(EnKF)and whole-well section heat transfer analysis is used to integrate drilling data and heat transfer model,and a model suitable for real-time temperature field monitoring and self-correcting analysis of high temperature gas wells in the western Sichuan Basin was established and verified by an example.Results show that the output values and various thermal and temperature parameters based on EnKF assimilation will gradually become more accurate as the measurement points are iterated.The application of the self-correction technology in real-time monitoring of heat transfer in wellbore improves the accuracy of downhole temperature and pressure monitoring,which can meet more drilling conditions.

关 键 词：随钻实时监测 井筒传热模型 状态估计 集合卡尔曼滤波 数据同化 

分 类 号：TE21[石油与天然气工程—油气井工程]