水平井分段压裂套管孔眼冲蚀机理研究

邹林浩; 宋杨; 苏义脑; 李玮; 赵欢; 盖京明; 李卓伦; 焦圣杰

doi:10.3969/j.issn.1006-6535.2024.05.015

特种油气藏 >

2024 , Vol. 31 >Issue 5: 127 - 135

DOI: https://doi.org/10.3969/j.issn.1006-6535.2024.05.015

钻采工程

水平井分段压裂套管孔眼冲蚀机理研究

邹林浩 ,
宋杨 ,
苏义脑 ,
李玮 ,
赵欢 ,
盖京明 ,
李卓伦 ,
焦圣杰

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1.东北石油大学,黑龙江大庆 163318;
2.中国石油吉林油田分公司,吉林松原 138000;
3.油气钻完井技术国家工程研究中心,北京 102206

邹林浩(1998—),男,2019年毕业于东北石油大学软件工程专业,现为该校石油与天然气工程专业在读博士研究生,主要从事非常规油气水力压裂数值模拟等方面的研究工作。

收稿日期: 2023-09-22

修回日期: 2024-06-21

网络出版日期: 2024-12-24

基金资助

国家自然科学基金面上项目“万米深井PDC钻头冲击破岩机理及提速方法研究”(52274005)

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Study on the Casing Erosion Mechanism in Staged Fracturing of Horizontal Wells

Zou Linhao ,
Song Yang ,
Su Yinao ,
Li Wei ,
Zhao Huan ,
Gai Jingming ,
Li Zhuolun ,
Jiao Shengjie

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1. Northeast Petroleum University,Daqing,Heilongjiang 163318,China;
2. PetroChina Jilin Oilfield Company,Songyuan,Jilin 138000,China;
3. National Engineering Research Center of Oil & Gas Drilling and Completion Technology,Beijing 102206,China

Received date: 2023-09-22

Revised date: 2024-06-21

Online published: 2024-12-24

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摘要

水平井分段压裂是页岩油开发的有效手段,在压裂过程中,由于长时间在高泵压、高砂量的条件下工作,套管射孔孔眼会产生侵蚀,导致套管壁厚减薄和孔眼处扩孔不均匀。为此,采用CFD-DDPM方法,开展了套管孔眼冲蚀的液-固两相流数值模拟研究,分析了密切割体积压裂过程中的套管孔眼冲蚀机理,研究了在不同射孔角度、含砂率、入口流速及颗粒粒径等因素影响下的射孔孔眼及邻近处的冲蚀规律。研究表明:随着套管射孔角度的增加,孔眼处的最大冲蚀速率呈“齿”形变化;随含砂率和入口流速的增加,最大冲蚀速率逐渐增大,且管道内壁的冲蚀区域也显著增加;随颗粒粒径的增大,最大冲蚀速率先减小后增大。基于CFD-DDPM方法的套管孔眼冲蚀液-固两相流数值模拟研究揭示了分段压裂中的孔眼冲蚀机理,对裂缝均衡起裂和延长工具寿命有重要指导意义。

关键词： 分段压裂; 冲蚀; 套管孔眼; 液-固两相流; CFD-DDPM; 水平井

本文引用格式

邹林浩 , 宋杨 , 苏义脑 , 李玮 , 赵欢 , 盖京明 , 李卓伦 , 焦圣杰 . 水平井分段压裂套管孔眼冲蚀机理研究[J]. 特种油气藏, 2024 , 31(5) : 127 -135 . DOI: 10.3969/j.issn.1006-6535.2024.05.015

Abstract

The staged fracturing of horizontal wells is an effective method for the development of shale oil.During the fracturing process,long-term operation under high pump pressure and high sand volume conditions leads to erosion of the casing holes,resulting in thinning of the casing wall thickness and uneven reaming at the hole.To address this issue, a numerical simulation study of liquid-solid two-phase flow for casing hole erosion is conducted using the CFD-DDPM method.In this study,the erosion mechanism of casing hole in the process of close-cut volume fracturing is analyzed,and the erosion law of perforation hole and its adjacent area under the influence of different perforation angles,sand content,inlet velocity and particle size is studied.The results show that with the increase of casing perforation angle,the maximum erosion rate at the hole opening exhibits a "tooth" shape variation;with the increase of sand content and inlet velocity,the maximum erosion rate increases gradually,and the erosion area on the inner wall of the pipeline also significantly increases;with the increase of particle size,the maximum erosion rate decreases first and then increases.The numerical simulation of liquid-solid two-phase flow for casing hole erosion based on CFD-DDPM method reveals the mechanism of hole erosion during staged fracturing,which has significant guiding for balanced fracture initiation and extending tool lifespan.

Key words： staged fracturing; erosion; casing perforations; liquid-solid two-phase flow; CFD-DDPM; horizontal wells

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