Testing Geothermal-Well Cements: Strength Measurements Following Exposures to Simulated Geothermal Fluids

摘要

Compressive and splitting tensile strengths were measured for several set cements at room temperature after they had been exposed for periods of 1 week and 1 month to a 20 wt percent salt solution pressurized to 20 MPa and heated to 300C. The compressive strength was also measured following exposures for identical periods to distilled water pressurized to 20 MPa and heated to 200C. Prior to the exposures, the cements had been set-cured for 2 days in molds immersed in water under the same pressure and temperature as the distilled water exposure. These measurements are part of a project being carried out to evaluate certain physical properties of cements which are candidates for use in finishing geothermal wells.