Dual porosity methodology for mineral volume calculations in source rock

A system and method for determining kerogen porosity of a formation for downhole operations is described herein. The method includes calculating a first formation characteristic and a second formation characteristic at a processor of an information handling system. The method further includes determining a kerogen porosity of the formation based, at least in part, on the first formation characteristic and the second formation characteristic. And the method also includes performing a downhole operation based, at least in part, on the determined kerogen porosity.