Reflection Imaging of HDR Reservoir at Soultz by Means of the AE Reflection Method

Abstract

This paper presents the reflection image of the Soultz Hot Dry Rock (HDR) reservoir by applying a type of reflection techniq ue which we call the AE reflection method where we use induced micro seismicity (acoustic emission: AE) as a wave source. We initially process the data to image some deep reflectors three dimensionally. Then we precisely relate these reflectors along the trajectory of the well GPK1, and obtained good agreement with other borehole observations. We have a lso analyzed along the expected well trajectory of deepened GPK2 before the actual drilling has finished in 1999. This results indicate a possible existence of some structures below pre-existing artificial reservoir, and are in harmony with estimates from microscopic examination of cuttings.