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二氧化碳洗井,因井径大,二氧化碳气量不够,含水层深,而往往见不到井喷,但仍能获得预期的洗井效果。1986年,我队施工的两口水井就是很好的例子。这两口供水井,一口是河北省沙河县铁矿选厂的水井,另一口是河北省井陉县微水电厂的水源井。施工前,我们对这两处的地层作了全面分析,认为石灰岩地层是含水的,岩层裂隙不发育的问题,可以通过二氧化碳洗井加以解决,以增大出口量。第一口井深361米,静水位120米,石灰岩含水层在220米以深,井径325毫米,用户要求出水量在30吨/小时以上。据此,成井后进行了二氧化碳洗井。具体
CO2 flushing wells, due to large diameter, insufficient carbon dioxide gas, aquifer depth, and often can not see blowout, but still get the expected washout effect. In 1986, the two wells we constructed were a good example. The two water supply wells, one is Shahe County, Hebei Province, iron ore processing plant wells, and the other is the Jingxing County, Hebei Province, micro-hydropower plant water wells. Before the construction, we made a comprehensive analysis of the two formations. We think that the limestone formation is water-bearing and the fractures of the rock layers are not developed. We can solve this problem by CO2 flushing to increase the export volume. The first well is 361 meters deep and has a quiet water level of 120 meters. The limestone aquifer is 220 meters deep with a caliber of 325 mm. The user requires a water output of 30 tons / hour or more. As a result, a carbon dioxide washout was carried out after the well was completed. specific