Stability of a reactive front in a heterogeneous porous medium characterised by a statistical description of a permeability and/or reactivity will be studied. Stochastic partial differential equations will be formulated. The feasibility of solving these stochastic differential equations will be evaluated in this proof of concept proposal, and the expected values and variances for the growth rate and wavelength of the disturbances determined as a function of input parameters. The results will have significant impact on areas such as reactive diagenesis in oil reservoirs and acid treatments of well bores. The investigators will interact with Mobil Tec Co., who are partially matching the proof of concept grant.