中国石油大学学报（自然科学版）2024，Vol.48Issue(3)：84-90,7.DOI:10.3969/j.issn.1673-5005.2024.03.009
基于井筒-地层置换效应的页岩油钻井环空流体温度分布
Distribution of annular fluid temperature due to fluid displacement between wellbore and formation during shale oil drilling
摘要
Abstract
The temperature distribution of annular fluid during shale oil drilling with oil-based drilling fluid can be affected by the fluid displacement condition between wellbore and near-wellbore rock formation.In this study,a prediction model of the annular fluid temperature distribution in shale oil wells was established based on fluid flow and heat transfer theory.The influence of the fluid displacement on the flow mode of the annular mixed fluid and the thermal physical parameters of the flu-id were considered in the model.Based on the model,the annular fluid temperature distribution under different displacement conditions was investigated.In addition,the influence of the displacement location,fluid type,displacement flow rate on the annular fluid temperature were analyzed.The results show that,when fluid displacement occurs,the fluid temperature in the annulus is higher than that under the normal drilling fluid circulation condition.If the fluid displacement occurs at the bottom of the well,there will be no obvious inflection point on the annular fluid temperature distribution curve.While the displace-ment occurs at other locations,there will be an obvious inflection point on the curve,and the location of the inflection point on the temperature disdribution curve is well corresponded to the displacement occurrence location.Furthermore,compared with shale oil with low specific heat,the annular fluid temperature will be higher when drilling fluid is displaced by formation water with high specific heat.In addition,when the intrusion rate of the formation fluids is greater than the leakage rate of the drilling fluid in wellbore,the higher the displacement rate,the higher the annulus fluid temperature.关键词
页岩油钻井/环空流体温度/置换位置/置换流体类型/置换速率Key words
shale oil drilling/annular fluid temperature/displacement position/displacement fluid type/displacement rate分类
能源科技引用本文复制引用
王江帅,任茜钰,邓嵩,汪海阁,崔猛,徐守坤,徐明华,李军,殷文..基于井筒-地层置换效应的页岩油钻井环空流体温度分布[J].中国石油大学学报（自然科学版）,2024,48(3):84-90,7.基金项目
中国石油-常州大学创新联合体项目(2021DQ06) （2021DQ06）
常州大学科研启动基金项目(ZMF22020060) （ZMF22020060）
江苏省高等学校基础科学(自然科学)研究面上项目(22KJD430001) （自然科学）
