[1]邓 嵩,殷 文,崔 猛,等.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(02):1-9.[doi:10.3969/j.issn.2095-0411.2024.02.001]
　DENG Song,YIN Wen,CUI Meng,et al.Annular pressure distribution under the displacement conditions of shale oil wells[J].Journal of Changzhou University(Natural Science Edition),2024,36(02):1-9.[doi:10.3969/j.issn.2095-0411.2024.02.001]
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基于页岩油井置换条件下的环空压力分布()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
第36卷
期数:
2024年02期
页码:
1-9
栏目:
石油与天然气工程
出版日期:
2024-03-28

文章信息/Info

Title:
Annular pressure distribution under the displacement conditions of shale oil wells
文章编号:
2095-0411(2024)02-0001-09
作者:
邓 嵩1;  殷 文1;  崔 猛2;  赵 飞2;  王江帅1;  李朝玮1;  闫霄鹏1
1.常州大学 石油与天然气工程学院, 江苏 常州 213164; 2.中国石油集团工程技术研究院有限公司, 北京 102206
Author(s):
DENG Song1;  YIN Wen1;  CUI Meng2;  ZHAO Fei2;  WANG Jiangshuai1;  LI Chaowei1;  YAN Xiaopeng1
1.School of Petroleum and Natural Gas Engineering, Changzhou University, Changzhou 213164, China; 2.CNPC Engineering Technology Research and Development Co., Ltd., Beijing 102206, China
关键词:
油基泥浆;  置换现象;  环空压力;  页岩油
Keywords:
oil-base mud;  displacement phenomenon;  annular pressure;  shale oil
分类号:
TE 21
DOI:
10.3969/j.issn.2095-0411.2024.02.001
文献标志码:
A
摘要:
在置换过程中,井筒内的钻井液与井周地层流体形成了动态的流体交换现象,导致环空中流体组成发生变化,进而引起环空压力的变化。现有环空压力计算模型无法准确预测基于置换条件下的压力分布,因此建立了一种基于置换条件下页岩油井环空压力计算新模型。通过数值模拟方法分析了影响环空压力分布的各因素,结果表明:① 保持环空流入地层的排量不变,增加地层流入环空的排量,环空压力降低约为1.19 MPa/L; ② 环空压力分布曲线上会出现一个拐点,且拐点位置与置换点位置一致; ③ 随着置换流体页岩油密度的增大,环空压力升高约为0.034 MPa/(kg·m-3)。研究结果可为发生在复杂地层钻井中的置换、漏失和溢流等问题提供一定的理论参考。
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 fluid 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 displacement conditions. Through numerical simulation analysis of various influencing factors on annular pressure 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 annular pressure by approximately 1.19 MPa/L; ② An inflection point will appear on the annular pressure distribution curve, and the inflection point position is consistent with the displacement point position; ③ With the increase of shale oil density of formation fluid, the annular pressure increases by approximately 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.

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备注/Memo

备注/Memo:
收稿日期: 2024-01-08。
基金项目: 中国石油-常州大学创新联合体资助项目(2021DQ06); 江苏省高等学校基础科学(自然科学)研究面上项目(22KJD430001)。
作者简介: 邓嵩(1989—), 男, 河南南阳人, 博士, 教授。E-mail: dengsong@cczu.edu.cn
更新日期/Last Update: 1900-01-01