Abstract:

In order to evaluate shale gas reservoir effectively, the particularity of shale gas reservoir relative to conventional one has been summed up in this paper, which includes richness in organic matter, abundance in clay minerals, finegrained texture, extremely low porosity and permeability, nanometer order of pore and throat structure, giant mineral surface area, complicated diagenesis, and great percentage of adsorbed natural gas. Based on the particularity of shale gas reservoir, the idea and method of evaluation for it have been discussed. It has been emphasized that the combination of direct measurement of evaluation parameters with indirect calculation, regular methods of measurement with special ones, evaluation of pore characteristics with gas adsorption capacity should be accepted. At last, the evaluation contents have been suggested, which should include mineral and organic components, porosity and permeability, types of pore space, gas adsorption capacity and rock mechanics.

Key words:  shale gas reservoir, particularity, evaluation idea, evaluation contents