Abstract: The authors of this paper use their own made porosity casting filler and filling equipment and prepare four types of porosity casts represent-ing good, ordinary, poor and very poor carbonate rocks from some typical sequences in Sichuan Area. Subsequently, the observations and analysis are carried out on reservoir rocks and integrated studies are made on the quality markers of the reservoir rocks. The direct observations of the porosity castings can illustrate the assemblage between the different porosites. Combined with the data of porous texture, it can evaluate the quality of reservoir rocks and provide scientific basis for reservoir analysis.