We report on our progress in developing a two-dimensional modified in situ oil shale retorting model. A kerogen pyrolysis model has been coupled to a two dimensional flow code called WAFE. WAFE computes multicomponent, two phase mass and energy transport in permeable media. It allows heat transport in the fluid, through the rubble, betweenfluid and rubble and within representative spherical shale particles. Representative sphere radii are chosen to match average particle surface area. Pyrolysis of kerogen occurs inside the particles. The fluid dynamics and the chemistry are fully coupled. Examples of calculations using the present form of the model are given.