注液态CO<sub>2</sub>开采天然气水合物实验研究

靳鸿铨; 赵建忠; 牛晓明; 张驰; 高强

doi:10.12434/j.issn.2097-2547.20240092

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注液态CO₂开采天然气水合物实验研究

水合物技术

- 注液态CO₂开采天然气水合物实验研究
- Experimental research on injection of liquid CO₂ for exploiting natural gas hydrates
- 低碳化学与化工 2024, 49(12): 134-140.
- 作者机构：
  
  1.太原理工大学原位改性采矿教育部重点实验室，山西太原 030024
  2.太原市生态环境监测与科学研究中心，山西太原 030002
  3.太原科技大学安全与应急管理工程学院，山西太原 030024
- 作者简介：
  
  靳鸿铨（1997—），硕士研究生，研究方向为水合物技术，E-mail：767340304@qq.com。
  赵建忠（1976—），博士，副教授，研究方向为水合物技术，E-mail：zhaojianzhong@tyut.edu.cn。
- 基金信息：
  
  山西省科技创新人才团队专项(202304051001012);博士后面上71批基金(2022M712337)
- DOI：10.12434/j.issn.2097-2547.20240092
  中图分类号： TE37;TE99
- 纸质出版日期：2024-12-25，
  
  收稿日期：2024-03-11，
  
  修回日期：2024-04-18，
- 稿件说明：
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靳鸿铨,赵建忠,牛晓明等.注液态CO₂开采天然气水合物实验研究[J].低碳化学与化工,2024,49(12):134-140.

JIN Hongquan,ZHAO Jianzhong,NIU Xiaoming,et al.Experimental research on injection of liquid CO₂ for exploiting natural gas hydrates[J].Low-carbon Chemistry and Chemical Engineering,2024,49(12):134-140.
靳鸿铨,赵建忠,牛晓明等.注液态CO₂开采天然气水合物实验研究[J].低碳化学与化工,2024,49(12):134-140. DOI： 10.12434/j.issn.2097-2547.20240092.

JIN Hongquan,ZHAO Jianzhong,NIU Xiaoming,et al.Experimental research on injection of liquid CO₂ for exploiting natural gas hydrates[J].Low-carbon Chemistry and Chemical Engineering,2024,49(12):134-140. DOI： 10.12434/j.issn.2097-2547.20240092.

摘要

注液态CO

开采天然气水合物既能安全采出CH

又能原位固碳。为揭示开采过程中CO

相态对水合物储层的影响规律，采用水合物三轴渗透实验装置，在NaCl体系中，以石英砂为多孔介质，注入CH

气体生成甲烷水合物，以此模拟天然气水合物储层。在4.5 MPa的孔隙压应力下，分别研究了注液态CO

开采对甲烷水合物分解行为的影响，反应温度对注液态CO

开采甲烷水合物的影响，以及反应温度对注液态CO

开采甲烷水合物后储层水合物饱和度的影响。结果表明，注液态CO

开采对甲烷水合物的分解有促进作用，反应温度为8.0 ℃、反应压力为4.5 MPa时，相较于降压法开采，注液态CO

开采CH

采出量提高了22.81%，CH

采出率提高了13.66%。在液态CO

环境中，高的反应温度有利于甲烷水合物分解，相较于6.0 ℃，反应温度为10.0 ℃时CH

采出量提高了40.41%。与CO

水合物生成时释放的热量相比，高的反应温度在促进水合物分解中占主导作用。随反应温度升高，CO

封存量、转化率和开采后储层水合物饱和度均降低。反应温度为6.0 ℃和10.0 ℃时，CO

封存量分别为0.1962 mol和0.1034 mol，CO

转化率分别为22.08%和11.86%，开采后储层水合物饱和度分别为57.91%和34.21%，较平均初始饱和度（41.72%）分别提高了38.81%和降低了18.01%。注液态CO

开采天然气水合物对提高CH

采出量和采出率，以及促进CO

封存具有积极作用。

Abstract

Injection of liquid CO

for exploiting natural gas hydrates can safely produce CH

while sequestering carbon in situ. To reveal the influence of CO

phase states on hydrate reservoirs during extraction

a triaxial hydrate penetration experimental apparatus was used. In a NaCl system

quartz sand served as the porous medium

gas was injected to form methane hydrate

simulating natural gas hydrate reservoirs. Under a pore pressure stress of 4.5 MPa

the effects of liquid CO

injection on the decomposition behavior of methane hydrate

the impact of reaction temperature on methane hydrate extraction by liquid CO

injection

and the influence of reaction temperature on the post-extraction hydrate saturation of the reservoir were studied

respectively. The results show that injection of liquid CO

promotes the decomposition of methane hydrate. At the reaction temperature of 8.0 ℃ and the reaction pressure of 4.5 MPa

compared with the depressurization method

injection of liquid CO

increases CH

producti

on by 22.81% and the recovery rate by 13.66%. In a liquid CO

environment

higher reaction temperatures are favorable for the decomposition of methane hydrate. Compared to 6.0 ℃

the CH

production increases by 40.41% at 10.0 ℃. Higher reaction temperatures play a dominant role in promoting hydrate decomposition

compared to the heat released during CO

hydrate formation. As the reaction temperature increases

sequestration amount

conversion rate

and post-extraction reservoir hydrate saturation all decrease. At reaction temperatures of 6.0 ℃ and 10.0 ℃

sequestration amounts are 0.1962 mol and 0.1034 mol

conversion rates are 22.08% and 11.86%

and post-extraction reservoir hydrate saturations are 57.91% and 34.21%

respectively

which increases by 38.81% and decreases by 18.01%

compared to the average initial saturation (41.72%). Injection of liquid CO

for exploiting natural gas hydrates has a positive effect on increasing CH

production and recovery rates

as well as promoting CO

sequestration.

关键词

液态CO2水合物开采天然气水合物CO2封存

Keywords

liquid CO2hydrate extractionnatural gas hydratesCO2 sequestration

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注液态CO2开采天然气水合物实验研究

Experimental research on injection of liquid CO2 for exploiting natural gas hydrates

DOI：10.12434/j.issn.2097-2547.20240092

摘要

Abstract

关键词

Keywords

references

注液态CO₂开采天然气水合物实验研究

Experimental research on injection of liquid CO₂ for exploiting natural gas hydrates