How Can Temperature Logs Help Identify Permeable Fractures and Define a Conceptual Model of Fluid Circulation? An Example from Deep Geothermal Wells in the Upper Rhine Graben

<div>T logs from well GPK-1 at thermal equilibrium (Mar 1993, five months after the last hydraulic tests) and during production, with the corresponding flow log (Sept 1996, production test at 11 L/s). T and flow anomalies are associated with the open fractures observed in the acoustic image logs at 3490 and 3495 m MD, respectively. Arrows indicate inflows of geothermal water through the fractures. Depth is expressed in MD. The T logs and flow logs were shifted manually to fit the anomalies with fracture zones in all wells.</div>

Geofluids

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Figure 7

Figure 7: How Can Temperature Logs Help Identify Permeable Fractures and Define a Conceptual Model of Fluid Circulation? An Example from Deep Geothermal Wells in the Upper Rhine Graben 

Figure 7 | How Can Temperature Logs Help Identify Permeable Fractures and Define a Conceptual Model of Fluid Circulation? An Example from Deep Geothermal Wells in the Upper Rhine Graben 