纳米SiO2强化CO2地质封存页岩盖层封堵能力机制试验
TE357.7; 页岩为CO2 盐水层地质封存常见盖层岩石类型,强化盖层封堵能力有利于提高CO2 地质埋存量和安全性.为探究随CO2 混注纳米SiO2(SNPs)强化盖层封堵能力的有效性和可行性,对CO2 地质封存页岩盖层样品开展原地条件下的超临界CO2 酸蚀反应试验,基础组为页岩样品-地层水、对照组为页岩样品-地层水+超临界CO2、优化组为页岩样品-地层水+SNPs+超临界CO2,并采用核磁共振测试、场发射扫描电镜可视化观测、X射线衍射测试和岩石力学试验,探究CO2 酸蚀反应前后的页岩孔隙结构、表面形貌、矿物成分及力学性质特征.结果表明:优化组的大孔孔隙分量及孔隙度和渗透率增大幅度低于对照组...
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| Published in | 中国石油大学学报（自然科学版） Vol. 48; no. 2; pp. 92 - 98 |
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| Main Authors | , , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
西南石油大学油气藏地质及开发工程国家重点实验室,四川成都 610500%重庆大学资源与安全学院,重庆 400030%Institute of Subsurface Energy Systems, Clausthal University of Technology, Agricolastra?e 10, Clausthal-Zellerfeld 38678%云南省天然气销售有限公司,云南昆明 650100
01.04.2024
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1673-5005 |
| DOI | 10.3969/j.issn.1673-5005.2024.02.010 |
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| Abstract | TE357.7; 页岩为CO2 盐水层地质封存常见盖层岩石类型,强化盖层封堵能力有利于提高CO2 地质埋存量和安全性.为探究随CO2 混注纳米SiO2(SNPs)强化盖层封堵能力的有效性和可行性,对CO2 地质封存页岩盖层样品开展原地条件下的超临界CO2 酸蚀反应试验,基础组为页岩样品-地层水、对照组为页岩样品-地层水+超临界CO2、优化组为页岩样品-地层水+SNPs+超临界CO2,并采用核磁共振测试、场发射扫描电镜可视化观测、X射线衍射测试和岩石力学试验,探究CO2 酸蚀反应前后的页岩孔隙结构、表面形貌、矿物成分及力学性质特征.结果表明:优化组的大孔孔隙分量及孔隙度和渗透率增大幅度低于对照组;与对照组相比,优化组黏土矿物与碳酸盐岩矿物相对含量损失少,表明随CO2 混注SNPs可使岩样内部酸蚀作用减弱;SNPs在岩石端面吸附聚集或进入岩心孔喉,可使优化组页岩样品力学性能损伤程度降低;随CO2 混注SNPs有利于强化CO2 盐水层地质封存盖层封堵能力. |
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| AbstractList | TE357.7; 页岩为CO2 盐水层地质封存常见盖层岩石类型,强化盖层封堵能力有利于提高CO2 地质埋存量和安全性.为探究随CO2 混注纳米SiO2(SNPs)强化盖层封堵能力的有效性和可行性,对CO2 地质封存页岩盖层样品开展原地条件下的超临界CO2 酸蚀反应试验,基础组为页岩样品-地层水、对照组为页岩样品-地层水+超临界CO2、优化组为页岩样品-地层水+SNPs+超临界CO2,并采用核磁共振测试、场发射扫描电镜可视化观测、X射线衍射测试和岩石力学试验,探究CO2 酸蚀反应前后的页岩孔隙结构、表面形貌、矿物成分及力学性质特征.结果表明:优化组的大孔孔隙分量及孔隙度和渗透率增大幅度低于对照组;与对照组相比,优化组黏土矿物与碳酸盐岩矿物相对含量损失少,表明随CO2 混注SNPs可使岩样内部酸蚀作用减弱;SNPs在岩石端面吸附聚集或进入岩心孔喉,可使优化组页岩样品力学性能损伤程度降低;随CO2 混注SNPs有利于强化CO2 盐水层地质封存盖层封堵能力. |
| Abstract_FL | Shale is a common type of caprock for geological storage of CO2 in brine aquifers,and the enhancement of the ca-prock sealing capacity is beneficial to improve the storage safety.In this study,in order to investigate the effectiveness and feasibility to enhance the sealing capacity with mixed injection of CO2 and nano-SiO2(SNPs),three reaction experiments of shale caprock samples and supercritical CO2 were conducted under reservoir conditions,including the basic experiment group for reactions between shale sample and formation water,the control experiment group for reactions among shale sample,for-mation water and supercritical CO2,and the optimization group for reactions among shale sample,formation water,SNPs,and supercritical CO2.The pore structure,surface morphology,mineral composition and mechanical properties of shale sam-ples before and after the three reaction experiments were evaluated using NMR,field emission scanning electron microscope visual observation,X-ray diffraction and rock mechanics testing techniques.The results show that the increasements of macro pore components,porosity and permeability in the optimization group were lower than those in the control group after the re-action experiments.Compared with the control group,the relative content loss of clay and carbonate minerals in the optimiza-tion group was also less,indicating that CO2 mixed with SNPs can weaken the internal acid erosion of rock samples.SNPs can be adsorbed and accumulated on the end face of the pores and enter the pore throats,which can lessen mechanical and chemical damage of shale samples,demonstrating that SNPs mixed with CO2 can be beneficial for enhancing the caprock?s sealing capacity for CO2 geological storage in brine aquifers. |
| Author | 罗红文 李海涛 李颖 周军平 LEONHARD Ganzer 李茂茂 康夫馨 |
| AuthorAffiliation | 西南石油大学油气藏地质及开发工程国家重点实验室,四川成都 610500%重庆大学资源与安全学院,重庆 400030%Institute of Subsurface Energy Systems, Clausthal University of Technology, Agricolastra?e 10, Clausthal-Zellerfeld 38678%云南省天然气销售有限公司,云南昆明 650100 |
| AuthorAffiliation_xml | – name: 西南石油大学油气藏地质及开发工程国家重点实验室,四川成都 610500%重庆大学资源与安全学院,重庆 400030%Institute of Subsurface Energy Systems, Clausthal University of Technology, Agricolastra?e 10, Clausthal-Zellerfeld 38678%云南省天然气销售有限公司,云南昆明 650100 |
| Author_FL | LUO Hongwen LI Ying LI Haitao LEONHARD Ganzer KANG Fuxin ZHOU Junping LI Maomao |
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| DocumentTitle_FL | Experiment on nano-SiO2 enhancing sealing capacity of shale caprocks for CO2 geological storage |
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| Keywords | nano-SiO2 超临界CO2 CO2地质封存 盖层封堵能力 纳米二氧化硅 CO2 geological storage supercritical CO2 caprock sealing capacity |
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| Publisher | 西南石油大学油气藏地质及开发工程国家重点实验室,四川成都 610500%重庆大学资源与安全学院,重庆 400030%Institute of Subsurface Energy Systems, Clausthal University of Technology, Agricolastra?e 10, Clausthal-Zellerfeld 38678%云南省天然气销售有限公司,云南昆明 650100 |
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| Snippet | TE357.7; 页岩为CO2 盐水层地质封存常见盖层岩石类型,强化盖层封堵能力有利于提高CO2 地质埋存量和安全性.为探究随CO2 混注纳米SiO2(SNPs)强化盖层封堵能力的有效性和可行性,对CO2 地质封存页岩盖层样品开展原地条件下的超临界CO2... |
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| Title | 纳米SiO2强化CO2地质封存页岩盖层封堵能力机制试验 |
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