| 李淑霞*,张孟琴,李杰.不同水合物饱和度下注热水开采实验研究[J].实验力学,2012,27(4):448~453 |
| 不同水合物饱和度下注热水开采实验研究 |
| Experimental Investigation of Hot-brine Injection to Dissociate Natural Gas Hydrate at Different Hydrate Saturation |
| 投稿时间：2011-11-11 修订日期：2012-03-13 |
| DOI： |
| 中文关键词: 天然气水合物 水合物饱和度 注热盐水 实验 |
| 英文关键词:Natural gas hydrate (NGH) NGH saturation hot-brine injection experiment |
| 基金项目:中国科学院可再生能源与天然气水合物重点实验室(y207k2)资助,“中央高校基本科研业务费专项资金”(09CX05001A) |
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| 中文摘要: |
| 为研究不同水合物藏饱和度对注热开采动态的影响,采用自制的一维天然气水合物(NGH)开采模拟实验装置,模拟地层多孔介质的条件,首先在填砂模型中生成不同饱和度的NGH,然后进行注热盐水分解实验。结果表明：不同饱和度的NGH注热分解产气都可划分为三个阶段,不同的是NGH饱和度越高,水合物分解阶段的产气速率越大,且该阶段持续的时间越长;NGH饱和度越高,注热分解阶段电阻率增大的幅度越大,系统各测点温度升高的幅度越小。注热分解过程中产水速率围绕注水速率而上下波动,且NGH饱和度越高,产水速率波动幅度越大;在实验研究范围内,随初始水合物饱和度的升高,注热开采的能量效率逐渐升高。因此,从能量效率来说,高饱和度的水合物藏更适宜于注热开采。 |
| 英文摘要: |
| In order to study the influence of NGH saturation on thermal dissociation characteristics, home-made one-dimensional natural gas hydrate (NGH) mining simulation equipment was used to simulate the porous medium of reservoir in stratum. NGH with different saturations was formed in sand-packing model first, then hot-brine was injected into the model to dissociate NGH. Experimental results show that gas production curve can be divided into three stages for all NGH saturations. The difference is as follows: the higher the NGH saturation is, the higher the gas production rate is at NGH dissociation stage and the duration of this period is longer; the higher the NGH saturation is, the larger the increment of the resistivity is at the NGH thermal dissociation stage, and the smaller the increment of temperature at measuring points is. Water production curve is fluctuated around the water injection curve at thermal dissociation stage, and the higher the NGH saturation is, the larger the fluctuation amplitude is. Energy efficiency increases gradually with NGH saturation increases within experimental range. So,from the energy efficiency, higher NGH saturation is more suitable for thermal dissociation. |
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