Inferring Hydraulic Pressure Changes from Induced Seismicity Observations: Three Showcases from Geothermal Reservoirs

Figure 12

Spatial distribution of the maximum cumulative fluid pressure changes inferred from repeated slip in top view of best-fitting plane. The time at which the maximum cumulative fluid pressure change is reached varies over the reservoir. Pressure changes are stated in megapascals according to the colour map, which is saturated at 50 MPa. The yellow star denotes the fault intersection of the well Habanero#1. The arrow indicates northern direction. A constant stress drop of (a) 0.1 MPa, (b) 0.5 MPa, and (c) 1.0 MPa was assumed for determining fluid pressure changes. Contour line denotes region of main seismic activity as outlined by the hypocentre distribution. Coordinates are given with respect to the top of Habanero#1.