Abstract An experimental campaign was conducted using bottom-hole geometry data from a 24-year-old injection well (∼1700 m deep) at a geothermal site exploiting the Dogger aquifer (Paris basin). A sonar tool was used to measure the geometry distortion of the open hole due to long-term reinjection of cooled brine. Reactive transport modelling was then performed. The calculated extent of carbonate dissolution at the well outlet was consistent with the sonar observations. The best fit to experimental results was obtained by considering partial CO2 degassing in the reinjected brine, which is consistent with the artesian mode doublet operation.

中文翻译：

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基于原位地热井数据模拟 Dogger 碳酸盐岩含水层（巴黎盆地）中长期冷盐水回注引起的水岩相互作用

摘要 使用来自开发 Dogger 含水层（巴黎盆地）的地热站点的 24 年注入井（深约 1700 m）的井底几何数据进行了实验活动。由于长期回注冷却盐水，声纳工具被用来测量裸眼的几何变形。然后进行反应性运输建模。计算出的井口碳酸盐溶解程度与声纳观测结果一致。通过考虑回注盐水中的部分 CO2 脱气获得与实验结果的最佳拟合，这与自流模式双峰操作一致。