EN考虑地质断层激活后的CO2封存流体泄漏模型及数值分析
Mathematical model and numerical analysis for leakage of fluid along geological fault during CO2 storage
- 油气藏评价与开发 2022年第5期 页码：754-763
- 作者机构：
1. 中国石油大学（华东）储运与建筑工程学院,山东 青岛 266580中国石油大学（华东）石油工程学院,山东,青岛,266580
2. 中国石油大学（华东）石油工程学院,山东,青岛,266580
- 作者简介：
[ "张立松（1982—）,男,博士,副教授,本刊青编委,主要从事稠油热采和CO2地质封存与利用方面的研究。地址：山东省青岛市黄岛区长江西路66号,邮政编码：266580。E-mail： lisongzhang1982@163.com" ]
- 基金信息：山东省自然科学基金项目“基于YADE种群平衡法的原始储层条件下煤岩破碎—块体滑落—井眼坍塌演化机理研究”(ZR2021ME024);中央高校基本科研业务费专项资金项目“基于种群平衡法的破碎性煤层钻井眼坍塌细观演化机理”(19CX02034A)
DOI：10.13809/j.cnki.cn32-1825/te.2022.05.007
中图分类号： E357.7-
纸质出版：2022
- 稿件说明：
移动端阅览
张立松, 蒋梦罡, 李文杰, 等. 考虑地质断层激活后的CO2封存流体泄漏模型及数值分析[J]. 油气藏评价与开发, 2022,(5):754-763.
ZHANG Lisong, JIANG Menggang, LI Wenjie, et al. Mathematical model and numerical analysis for leakage of fluid along geological fault during CO2 storage[J]. Petroleum Reservoir Evaluation and Development, 2022, (5): 754-763.
张立松, 蒋梦罡, 李文杰, 等. 考虑地质断层激活后的CO2封存流体泄漏模型及数值分析[J]. 油气藏评价与开发, 2022,(5):754-763. DOI： 10.13809/j.cnki.cn32-1825/te.2022.05.007.
ZHANG Lisong, JIANG Menggang, LI Wenjie, et al. Mathematical model and numerical analysis for leakage of fluid along geological fault during CO2 storage[J]. Petroleum Reservoir Evaluation and Development, 2022, (5): 754-763. DOI： 10.13809/j.cnki.cn32-1825/te.2022.05.007.
摘要
地质断层活化后
流体（CO
2
、盐水、淡水）沿断层泄漏是CO
2
地质封存中不可忽视的关键问题
因此
推导了不同阶段流体沿断层的泄漏速度方程
并结合质量守恒方程和能量守恒方程
建立地质活化断层的CO
2
封存流体泄漏模型
获取了流体沿断层泄漏的关键参数（泄漏时间和泄漏量）。模拟不同参数对流体泄漏时间和泄漏量的影响:随着CO
2
注入速度增快和储层渗透率增大
CO
2
沿断层泄漏的初始时间提前
持续时间延长
泄漏量增加;随着断层渗透率的增加
CO
2
沿断层泄漏的初始时间和持续时间没有变化
而CO
2
泄漏量增加;相较于CO
2
注入速度和储层渗透率
断层渗透率对盐水和淡水泄漏影响最大。综上所述:流体沿断层泄漏的先后顺序为盐水、CO
2
、淡水;流体沿断层泄漏的持续时间由长到短依次为:CO
2
、淡水、盐水;流体沿断层的泄漏量由大到小为CO
2
、盐水、淡水。
Abstract
The leakage of fluid （CO
2
brine and freshwater） along fault is a crucial issue that cannot be ignored during CO
2
geological storage. For this reason
the equations to describe the fluid leakage rate along faults in different stages are derived. Then
these equations are combined with mass and energy conservation equations to establish the fluid leakage model in CO
2
storage processes by considering geologically activated faults. In su
ch case
the crucial parameters （i.e.
leakage time and leakage amount） for fluid leakage along a fault are obtained. The results of the effects of different parameters on leakage time and amount show the advanced initial time of CO
2
leakage
the extended duration and the increased leakage amount of CO
2
with CO
2
injection rate and reservoir permeability increasing. Meanwhile
the initial time and duration of CO
2
leakage are unchanged while the leakage amount of CO
2
is increased
when increasing the fault permeability. In addition
the fault permeability has the greatest impact on the leakage amount of brine and freshwater
compared to CO
2
injection rate and reservoir permeability. The numerical results show that brine starts to leak earliest
followed by CO
2
freshwater. Meanwhile
the duration of CO
2
leakage along a fault is the longest
while the duration of brine leakage is the shortest. Additionally
the leakage amount of CO
2
is the largest
followed by brine leakage amount and the freshwater leakage amount.
关键词
Keywords
references
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