Multiple Zone Geothermal Stimulation Case Study: Fluid Diversion Using Thermo-Degradable Zonal Isolation Materials

Abstract

In both conventional geothermal projects and in EGS, the flow rate from each production well is a critical component of project economics and has a direct effect on the Levelized Cost of Electricity (LCOE). By focusing our efforts in geothermal technology on improving production and injection rates through stimulation, we can mitigate exploration risk and expand the base of geothermal power production. AltaRock has performed four stimulations to date using Thermo-degradable Zonal Isolation Materials (TZIM) to block existing permeable zones and created multiple stimulated fracture systems in conventional geothermal and EGS reservoirs. The TZIM stimulation conducted in a liquid dominated mid-temperature reservoir was able to enhance multiple zones in the target well and increase production flow rate as well as overall production temperature.