北京通州地区深部地热井间的影响分析

The Discuss on Mutual Influence from Different Deep Geothermal Wells in Tongzhou Area, Beijing

为了认清北京市通州地区深部地热井间是否存在相互影响,本文选取研究区内新钻凿成功地两眼地热井(京通-3井和京通-4井)进行抽水和观测试验,对京通-4井进行大流量和小流量的抽水试验,同时观测其邻近的京通-3井中的水位变化。试验结果表明,在对京通-4井进行抽水试验时,附近的京通-3井中的水位未发生明显变化,说明京通-3井没有受到抽水影响,这可能主要是由于两眼地热井距离约2km,相对较远,在对其中一眼地热井进行抽水试验时,其并不能影响到邻近相对较远的地热井中的水位变化。

In order to acquire the mutual infuence from the diferent deep geothermal resources in Tongzhou area, Beijing, we chose 2 geothermal wells （Jingtong-3 well and Jingtong-4 well） drilled recently to conduct pumping and observing tests in the studying area. When the Jingtong-4 geothermal well was pumped （mass fow and small fow）, meanwhile the water level of Jingtong-3 geothermal well in the near of the Jingtong-4 geothermal well was monitored. The test results showed there were no obvious descends of water level in the Jingtong-3 geothermal wells when the Jingtong-4 geothermal well was pumped, implying no obvious mutual influence from deep geothermal water in the studying area. The reason might be that there was a relative long distance between the two geothermal wells （the distance of about 2 km）, greater than the sum of infuencing radius between two geothermal wells. When one geothermal well was pumped, there were no obvious impacts on the variation of water level in another geothermal well.