| 摘要: |
| 使用自制的一维天然气水合物开采模拟实验装置，对天然气水合物降压开采进行了物理模拟实验研究，考察 了降压幅度、降压速度对开采效果的影响。实验结果表明，降压幅度主要影响最终产出气体的总量，降压幅度越大， 累积产气量TT分比越大。降压速度越大，产气速率越高，当最终压力相同时，降压速度只影响开采持续时间，最终产 气量百分比基本一致;降压速度越慢，当压力降到相同水平时累积产气量百分比越大，特别在降压初期这一现象更 明显。 |
| 关键词: 天然气水合物 降压开采 影响因素 降压速度 降压幅度 |
| DOI： |
| 分类号: |
| 基金项目:国家163”计划资助项目(2006AA09A209)和国家自然科学蓐佥资助项目(50404003) |
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| Experimental research on influence factors of natural gas hydrate production by depressurizing in porous media |
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LJ Shu-xia, CHEN Yue-ming, HAO Yong-raao, DU Qing-jun
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(College of Petroleum Engineering in China University of Petroleum, Dongying 257061,Shandong Province, China)
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| Abstract: |
| The physical simulation experiment of natural gas hydrate (NGH) production by depressurizing in sand-packed porous media were carried out using a new type of apparatus self-designed. Different influence factors were analyzed. Under the experimental conditions ^ the depressurizing range mainly affects the accumulative gas production，and the higher the de-pressurizing range is，the higher the percent of the accumulative gas production is. And the higher the depressurizing rate is， the higher the gas production rate is. The depressurizing rate just has effect on the continued time of production when the ultimate pressure ia certain. The slower the depressurizing rate is，the higher the percent of accumulative gas pnxluction is when the ultimate pressure is certain，especially in the initial stages of depressurizing. |
| Key words: natural gas hydrate depressurizing production influence factors depressurizing rate depressurizing range |
