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首页> 外文会议>23rd New Zealand Geothermal Workshop 2001, 2001, Auckland >REACTION FRONT FINGERING IN ANHYDRITE CEMENTED SANDSTONE
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REACTION FRONT FINGERING IN ANHYDRITE CEMENTED SANDSTONE

机译：无水胶结砂岩反应前指

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摘要

A geothermal bore at Allermoehe (Germany) tapped unintentionally and unexpectedly a reservoir almost totally cemented with anhydrite. Laboratory core flooding experiments were conducted to determine the potential to stimulate the geothermal aquifer. During these experiments sudden permeability increases, due to dissolution of anhydrite, were observed. Preferential flow paths were detected in the cores by X-ray tomography and are here simulated numerically. The numerical code SHEMAT a simulation system for coupled flow, heat transfer, species transport, and chemical reactions is used. Data of the core flooding experiments and the numerical studies coincide. A feasibility study to stimulate the geothermal aquifer at Allermoehe shows that the development of preferential flow paths within the vicinity of the bore can be expected. Hence, gentle stimulation of the bore seems possible.
机译：德国阿勒穆赫（Allermoehe）的地热钻孔无意间被挖空，出乎意料的是，一个几乎完全由硬石膏胶合的储层。进行了实验室岩心驱油实验，以确定刺激地热含水层的潜力。在这些实验中，观察到由于硬石膏的溶解，渗透率突然增加。通过X射线断层扫描检测到岩心中的优先流动路径，并在此处进行数值模拟。使用数字代码SHEMAT-用于耦合流动，传热，物质传输和化学反应的模拟系统。岩心驱油实验数据与数值研究吻合。刺激Allermoehe地热含水层的可行性研究表明，可以预期在井眼附近形成优先流动路径。因此，似乎可以对孔进行轻微的刺激。

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