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Clogging mechanism in the process of reinjection of used geothermal water: A simulation research on Xianyang No.2 reinjection well in a super-deep and porous geothermal reservoir 下载免费PDF全文
In the process of geothermal exploitation and utilization, the reinjection amount of used geothermal water in super-deep and porous reservoir is small and significantly decreases over time. This has been a worldwide problem, which greatly restricts the exploitation and utilization of geothermal resources. Based on a large amount of experiments and researches, the reinjection research on the tail water of Xianyang No. 2 well, which is carried out by combining the application of hydrogeochemical simulation, clogging mechanism research and the reinjection experiment, has achieved breakthrough results. The clogging mechanism and indoor simulation experiment results show: Factors affecting the tail water reinjection of Xianyang No. 2 well mainly include chemical clogging, suspended solids clogging, gas clogging, microbial clogging and composite clogging, yet the effect of particle migration on clogging has not been found; in the process of reinjection, chemical clogging was mainly caused by carbonates (mainly calcite), silicates (mainly chalcedony), and a small amount of iron minerals, and the clogging aggravated when the temperature rose; suspended solids clogging also aggravated when the temperature rose, which showed that particles formed by chemical reaction had a certain proportion in suspended solids. 相似文献
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利用RUSLE土壤侵蚀模型,定量估算了2 000 a来西汉康陵的封土土壤侵蚀量。结果表明,2 000 a来帝陵土壤侵蚀约123 563.63 t,约占帝陵封土的9.65%,康陵封土总质量约1 403 753.23 t。按照西汉帝陵覆斗形封土的外观,2 000 a以来封土土壤侵蚀高度在1.22~1.59 m之间。研究结果为秦汉帝陵封土壤侵蚀研究提供了一种新的思路和方法。 相似文献
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通过分析咸阳市区低级阶地深层地下水资料 ,说明当地在 30 0m以下赋存比较丰富的地下水资源。因此 ,进一步研究咸阳市区深层地下水特征具有重要意义 相似文献