摘要
以天津武清地热田为例 ,探讨在孔隙介质地热田开展回灌的技术可行性。武清地热田主要开采层为第 3系馆陶组砂岩 ,热储层温度 76～ 86℃ ,1998年总开采量达到 1 18Mm3。经过数学模型预测 ,该热储水位降深将在近期内趋于稳定。在无回灌条件下 ,如果以最大开采量持续开采 ,将导致 5年内水位下降到 10 5m。如果增加 3眼回灌井 ,水位下降幅度将减缓 15m。此外 ,计算了在回灌过程中各种不同情况下冷锋面的运移速度 。
The Wuqing geothermal field is a typical low temperature system,which is an extensive horizontal sandstone zone with the temperature of 76～86℃.The production rate of the whole field reached 1.18Mm 3 in 1998.The flow model indicates that the reservoir will reach near steady state condition recently.The maximum production rate without injection will cause water level draw down of 105m.The draw down of water level can be reduced to 15m if three doublets are employed for injection/production.The thermal breakthrough time and pressure support of reinjection are discussed and a tracer test is also recommended.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2001年第2期236-239,共4页
Acta Energiae Solaris Sinica
关键词
孔隙介质
数学模型
地热田
回灌试验
porous media
geothermal reinjection
mathematics model
thermal breakthrough
tracer test
