Biography:
Abstract:
During shale gas development, large amount of adsorbed gas in the shale pores are gradually desorbed, which results in different shale properties changes such as permeability, structure, etc. This paper objective is to determine how the adsorption and desorption characteristics of shale can be used for shale gas evaluation. Different concepts such as: measured gas; lost gas; bulk density; residual gas; geochemistry of shale gas; gas filled porosity and others will be discussed and supported by theoretical evidences and experimental measurements. The importance of adsorption-desorption correlation to assure accurate shale gas content will be presented as well. The question of how small canisters and high resolution equipment are necessary to measure the gas content of individual shale sidewall samples will be answered