Enhanced geothermal systems (EGS) seek to use hydraulic fracturing to achieve high flow rates from wells drilled in formations with high temperature but low permeability. Project Cape in Utah is an ongoing EGS project with a planned capacity of 400 MWe. In an initial circulation test, the first production well drilled for the project flowed at more than 100 kg/s (54,000 B/D), a record for an EGS project. In this paper, modeling work performed to design the fracturing treatment and spacing for the wells is described.
Introduction
In EGS, hydraulic stimulation is used to improve the flow rate that can be achieved through geothermal wells.
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