| 水射流破碎联合CO2置换开采天然气水合物新工艺及实验研究 |
| 投稿时间：2021-05-27 修订日期：2021-05-27 点此下载全文 |
| 引用本文：李子涵,陈晨,潘栋彬,等.水射流破碎联合CO2置换开采天然气水合物新工艺及实验研究[J].钻探工程,2021,48(S1):290-295.LI Zihan,CHEN Chen,PAN Dongbin,et al. New technology and experimental research on water jet crushing combined with CO2 replacement to exploit natural gas hydrate[J]. Drilling Engineering, 2021,48(S1):290-295. |
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| 基金项目:国家自然科学基金项目“高压低温水射流作用下海底天然气水合物储层破岩过程与机理研究”（编号：41672361）；吉林省科技厅国际合作项目“海洋天然气水合物置换开采关键技术研究”（编号：20170414044GH）；吉林省省校共建项目-新能源专项“油页岩地下原位开发利用示范工程”（编号：SXGJSF2017-5） |
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| 中文摘要:本文对目前开采天然气水合物的5种方法进行了归纳总结，重点分析了CO2置换开采以及固体开采法，并通过分析这2种开采方法的优劣势，提出了水射流冲蚀、破碎海洋天然气水合物储层联合CO2置换开采天然气水合物的新思路。水射流冲蚀、破坏水合物储层后形成的采空区能为CO2提供更好的储藏空间并提高其与储层的作用面积，提高置换效率；封存的CO2水合物也可以提高水合物储层的稳定性，具有良好的互补效应。实验结果表明，在整个置换过程中，含采空区储层CH4置换率为24.3%，CO2封存率为22.1%；完整储层CH4置换率为15.3%，CO2封存率为20.9%，置换率提升约59%，封存率提升约5.7%。采空区的作用主要体现在提升水合物置换介质的注入量上。 |
| 中文关键词:天然气水合物 水射流破碎 CO2/N2置换 联合开采工艺 CO2封存 |
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| New technology and experimental research on water jet crushing combined with CO2 replacement to exploit natural gas hydrate |
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| Abstract:The five current methods of mining natural gas hydrates are summarized with focus on the analysis of CO2 replacement mining and solid mining methods， and by analyzing the advantages and disadvantages of the two mining methods， a new approach， by which water jets erodes and breaks ocean gas hydrates in combination with CO2 replacement， is proposed for the exploitation of natural gas hydrates， The mined-out area formed by erosion and breaking of water jets in the hydrate reservoir can provide better storage space for CO2， increase its interaction area with the reservoir， and improve the replacement efficiency. The stored CO2 hydrate can also increase the stability of the hydrate reservoir， providing good complementary effect. The experimental results show that during the entire replacement process， the CH4 replacement rate in the reservoir containing the mined-out area is 24.3%， and the CO2 storage rate is 22.1%； while the CH4 replacement rate in the intact reservoir is 15.3%， and the CO2 storage rate is 20.9%； indicating that the replacement rate increases about 59%， the storage rate increases about 5.7%. The function of the goaf is mainly reflected in increasing the injection volume of the hydrate replacement medium. |
| keywords:natural gas hydrate water jet breaking CO2/N2 replacement combined mining technology CO2 storage |
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