Geothermal reservoir simulation for a complex model

Using a complex model consisting of lumped-parameter reservoirs and a fault zone, all connected by aquifers, a geothermal reservoir simulation was carried out by changing the permeability of the aquifer. The results indicate that the permeability has a considerable effect on mutual interferences among reservoirs. It is also shown that the pressures of the producing reservoirs show steep drops in the compressed water condition, and comparatively gentle drops in the saturated condition. While, the temperatures show smooth-curved drops in the both conditions. The compressibility of the water is so small that even a small mass decrease in the reservoir, i.e. density decrease, causes a steep pressure drop, and the pressure in the saturated condition does not drop so steeply, due to the volumetric expansion, as that in the compressed water condition.