常州大学学报（自然科学版）2024，Vol.36Issue(2)：1-9,9.DOI:10.3969/j.issn.2095-0411.2024.02.001
基于页岩油井置换条件下的环空压力分布
Annular pressure distribution under the displacement conditions of shale oil wells
摘要
Abstract
During the displacement process,dynamic fluid exchange occurs between the fluid in the wellbore and the surrounding formation fluid,leading to changes in the composition of the annular flu-id and subsequently causing variations in annular pressure.Existing models for calculating annular pressure cannot accurately predict pressure distribution based on displacement conditions.Therefore,this study establishes a novel model for calculating annular pressure in shale oil wells under displace-ment conditions.Through numerical simulation analysis of various influencing factors on annular pres-sure distribution,the results indicate:① Maintaining a constant flow rate of annular fluid entering the formation,increasing the flow rate of formation fluid entering the annulus results in a reduction of an-nular pressure by approximately 1.19 MPa/L;② An inflection point will appear on the annular pres-sure distribution curve,and the inflection point position is consistent with the displacement point posi-tion;③ With the increase of shale oil density of formation fluid,the annular pressure increases by ap-proximately 0.034 MPa/(kg·m-3).The results of this study can provide some theoretical reference for problems such as displacement,leakage and overflow in drilling in complex formations.关键词
油基泥浆/置换现象/环空压力/页岩油Key words
oil-base mud/displacement phenomenon/annular pressure/shale oil分类
能源科技引用本文复制引用
邓嵩,殷文,崔猛,赵飞,王江帅,李朝玮,闫霄鹏..基于页岩油井置换条件下的环空压力分布[J].常州大学学报（自然科学版）,2024,36(2):1-9,9.基金项目
中国石油-常州大学创新联合体资助项目(2021DQ06) （2021DQ06）
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）
