Abstract
This paper presents the results of numerical studies aiming to assess the effects of cement hydration on the casing
integrity in superhot well conditions. Casing integrity challenges for high and super-high temperature geothermal wells were first
discussed. A simplified well cement material model was implemented in the stand-alone code, Casinteg, to simulate cement behaviour
in field conditions. Numerical simulations were performed, based on the IDDP-2 well scenarios, to investigate the effect of cement
retarders, cement hydration heat and cement shrinkage on the casing stresses. The obtained results have shown that by engineering
proper cement solutions, the risks of casing failure in geothermal wells can be minimized to sustainably harvesting green power from
superhot geothermal reservoirs.
integrity in superhot well conditions. Casing integrity challenges for high and super-high temperature geothermal wells were first
discussed. A simplified well cement material model was implemented in the stand-alone code, Casinteg, to simulate cement behaviour
in field conditions. Numerical simulations were performed, based on the IDDP-2 well scenarios, to investigate the effect of cement
retarders, cement hydration heat and cement shrinkage on the casing stresses. The obtained results have shown that by engineering
proper cement solutions, the risks of casing failure in geothermal wells can be minimized to sustainably harvesting green power from
superhot geothermal reservoirs.
