| 摘要: |
| 注热开采产气速度的稳定性主要受温度场变化的影响，即受注水速度、注水温度和模型热物性的共间控制。 应用研制的天然气水合物(NGH)合成与开采实验系统，进行NGH注热开采实验研究。该实验系统热量损失大、换 热效率和热利用率较低,实验条件下的最优注水温度为81. 44 1。根据实验数据得到的实际NGH藏换热效率可超 过6，因此从能最角度评价注热开采是可行的。通过优化注热水的温度、速度等参数,采用“热水段寒+常温水驱 替”、注热与降压联合开采、减少管线热损失等措施，可以大大提高注热开采的效益。 |
| 关键词: 天然气水合物 注热开采 温度场 换热效率 热利用率 实验研究 |
| DOI： |
| 分类号: |
| 基金项目:国家。863”计划资助项目(2006AA09A209)和国家自然科学基金资助项目< 50404003) |
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| Experimental study on production of natural gas hydrate by thermal stimulation |
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HAO Yong-mao, CHEN Yue-ming, LI Shu-xia
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(College of Petroleum. Engineering in Chim University cf Petroleum y Dongying 257061,Shandong Province, China)
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| Abstract: |
| The gas production rate of thermal stimulation was mostly conirolledi by the changing of temperature field, that is to controlled by injection rate, water temperature and thermal properties of experimental model. Using the experimenta) system of natural gas hydrate(NGH) forming and production, the production behaviors of NGH by thermal stimulation were investigated. The heat loss of this thennal model is high so that the efficiencies of heat exchange and heat utilization are low. Under the experimental condition, the highest gas production efficiency is obtained by thermal stimulation when the water injection temperature is 81. 44 According to the experimental data> the efficiency of heat exchange in actual NGH reser^ voirs can be up to 6, which indicates that production by iheimal stimulation for NGH reservoir is feasible^ Through a series of measures, auch aa optimizing temperature and rate of the water injection, applying hot water slug and normal temperature water drive’ combining depressurization with thermal stimulation, lessening the heat loss in pipelines, the efficiency of theimal stimulation could be increased significantly. |
| Key words: natural gas hydrate production by thermal stimulation temperature field efficiency of heat exchange heal uti, Jization factor experimental study |
