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首页> 外文期刊>Energy Conversion & Management >An experimental study on gas production from fracture-filled hydrate by CO_2 and CO_2/N_2 replacement
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An experimental study on gas production from fracture-filled hydrate by CO_2 and CO_2/N_2 replacement

机译：用CO_2和CO_2 / N_2替代裂缝填充水合物产气的实验研究。

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摘要

The fracture-filled gas hydrate commonly occurs in marine fine-grained sediments and the fracture of rock in permafrost regions. Gas production from fracture-filled methane hydrate by the CO2 replacement method has been investigated. The reservoir condition of permafrost-associated gas hydrate in Muri Basin, Qilian Mountains was taken as an example to set up the experimental parameters. CO2, CO2/N-2 (3:1) and CO2/N-2 (1:3) were selected for gas replacement. Based on the results from six sets of laboratory experiments, we can learn that the factors affecting gas replacement included gas composition for replacement, pressure and the morphology of the hydrate. When the pressure was lower than the equilibrium pressure of CO2/N-2 binary hydrate and the equilibrium pressure of methane hydrate, there was a rapid decomposition process of methane hydrate and might be a transient water freezing process at the first few minutes. The ice around methane hydrate might inhibit the further decomposition of methane hydrate. A higher replacement rate and accumulative methane recovery ratio can be obtained when the morphology of methane hydrate was well distributed thin layer, which could be obtained with the ice layer by gradually increasing its temperature. The thin layer of hydrate is the main morphology of the fracture-filled gas hydrate found in the Qilian Mountain permafrost. Therefore, the gas production from hydrate by CO2/N-2 (3:1) replacement might be a good choice for gas production from hydrate in Muri Basin, Qilian Mountain.
机译：充满裂缝的天然气水合物通常发生在海洋细颗粒沉积物中，而在多年冻土地区的岩石破裂。已经研究了通过CO2替代方法从裂缝填充的甲烷水合物生产天然气。以祁连山木里盆地多年冻土伴生天然气水合物的储层条件为例，建立了实验参数。选择了CO2，CO2 / N-2（3：1）和CO2 / N-2（1：3）进行气体置换。根据六组实验室实验的结果，我们可以了解到影响气体置换的因素包括置换气体的成分，压力和水合物的形态。当压力低于CO2 / N-2二元水合物的平衡压力和甲烷水合物的平衡压力时，甲烷水合物会快速分解，并且可能在开始的几分钟内是短暂的水冻结过程。甲烷水合物周围的冰可能会抑制甲烷水合物的进一步分解。当甲烷水合物的形态分布较薄时，可以获得较高的置换率和甲烷的累积回收率，这可以通过逐渐提高冰层温度来获得。水合物薄层是祁连山多年冻土中充满裂缝的天然气水合物的主要形态。因此，在祁连山木里盆地，用CO2 / N-2（3：1）替代水合物生产天然气可能是水合物天然气生产的良好选择。

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  • 来源
    《Energy Conversion & Management》 |2018年第6期|738-747|共10页
  • 作者

    Li Bing; Xu Tianfu; Zhang Guobiao; Guo Wei; Liu Huanan; Wang Qiuwen; Qu Lili; Sun Youhong;

  • 作者单位

    Jilin Univ, Coll Construct Engn, Changchun 130026, Jilin, Peoples R China;

    Jilin Univ, Coll Environm & Resources, Changchun 130021, Jilin, Peoples R China;

    Jilin Univ, Coll Construct Engn, Changchun 130026, Jilin, Peoples R China;

    Jilin Univ, Coll Construct Engn, Changchun 130026, Jilin, Peoples R China;

    Changchun Inst Technol, Changchun 130021, Jilin, Peoples R China;

    Jilin Univ, Coll Construct Engn, Changchun 130026, Jilin, Peoples R China;

    Jilin Univ, Coll Construct Engn, Changchun 130026, Jilin, Peoples R China;

    Jilin Univ, Coll Construct Engn, Changchun 130026, Jilin, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Fracture-filled hydrate; Gas replacement; Gas recovery; Gas sequestration; CO2/N-2; Qilian Mountain permafrost;

    机译：裂缝性水合物;天然气替代;天然气采收;天然气固存;CO2 / N-2;祁连山多年冻土;

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