Application of the Constrained Interpolation Profile (CIP) scheme to two-dimensional single-phase hydrothermal reservoir simulations

•Numerical techniques for hydrothermal reservoir simulations have been developed.•The Constrained Interpolation Profile (CIP) scheme is adopted.•Numerical dispersion is effectively controlled by the CIP scheme.•The temperature change in a reservoir due to cold water reinjection is simulated.•The flow of a tracer injected in the reservoir is also simulated.

The Constrained Interpolation Profile (CIP) scheme is applied to two-dimensional single-phase numerical simulations of hydrothermal reservoirs for effectively controlling numerical dispersion. The advection terms of the equations for the conservation of mass, enthalpy, and a tracer are solved using the CIP scheme and the non-advection terms, using the finite difference method. The CIP scheme successfully reproduces the high-contrast temperature distribution during cold water reinjection into a hydrothermal reservoir. The flow of a tracer injected into the same reservoir with little dilution is also simulated successfully. In both problems, the conventional first-order upstream difference scheme suffers from severe numerical dispersion.