Simultaneous recovery of crude from multiple zones in a reservoir

A method for simultaneously recovering hydrocarbonaceous fluids from a formation or reservoir containing same having multiple permeability zones separated by a shaley layer comprising:

• (a) injecting via a first injection means provided in a well an oxygen containing fluid into a first hydrocarbonaceous zone fluidly communicating with a first a production means provided in a well where said first zone is vertically diplaced from a second hydrocarbonaceous zone and separated by said shaley layer;
• (b) combusting in-situ said first zone and producing hydrocarbonaceous fluids containing carbon dioxide therein as a conbustion by-product from said production means provided in a well;
• (c) separating carbon dioxide from said hydrocarbonaceous fluids;
• (d) injecting carbon dioxide into said second zone via a second injection means provided in a well which is fluidly connected to a second production means provided in a well in said second zone while simultaneously producing fluids from said first zone;
• and
• (e) producing hydrocarbonaceous fluids containing carbon dioxide from said second zone via said second production means.