Page 284 - Geothermal Energy Systems Exploration, Development, and Utilization

260 5 Geothermal Reservoir Simulation

2
Permeability (m )
5.82e-019 1.75e-018 5.26e-018 1.58e-017 4.75e-017

Figure 5.10 Realization of a permeability distribution for an undisturbed reservoir.

The problem with stochastic analysis of deep reservoirs is data scarcity. Normally
only data from a few boreholes are available to derive statistical properties. Some
oil reservoirs can afford 3D seismics in order to obtain a better picture of the
subsurface structures.

5.4
Site Studies

In the following text, we present several site studies (Figure 5.1) using geothermal
reservoir simulation based on different numerical models. These geothermal
reservoirs are located in different geological formations such as sandstone and
crystalline rock requiring the application of various conceptual models (Figure 5.2).
New and ongoing investigations that is, at Groß Sch¨ onebeck (Section 5.5) and
Bad Urach (Section 5.6) are explained in more detail. Former case studies at
Rosemanowes (Section 5.7), Soultz (Section 5.8), KTB (Section 5.9), and Stralsund
(Section 5.10) are briefly summarized, and literature references are given.

5.5
Groß Sch¨ onebeck

In this section, the hydrothermal simulation of the geothermal research doublet E
GrSk03/90 and Gt GrSk04/05 at the drill site Groß Sch¨ onebeck is described.

5.5.1
Introduction

The technical feasibility of geothermal power production will be demonstrated
by means of the geothermal research wells Groß Sch¨ onebeck (40 km north of
Berlin/Germany) using a borehole doublet. The first well Groß Sch¨ onebeck E