Factors of controlling shale gas content and gas content test methods studies progressing

摘要

Shale gas mainly save in organic-rich shale by the state of free and adsorbed. Summarizing research of shale gas exploration and development account that factors controlling gas content of shale gas including total organic content, organic maturity, pore types and pore volume, mineral composition and content, fracture, formation temperature and pressure, their impact on gas content is mainly reflected in gas content has positive correlation with total organic matter, the higher maturity the more gas; Microfractures contribute to desorption of the adsorption gas and crack-scale is too large destructed the closed shale, detrimental to gas storage; Adsorbed gas increases with increasing pressure and adsorption gas will decrease exponentially with increasing temperature. And analysis of the current testing methods of shale gas content, comparing and summarizing the advantages and disadvantages of the various test methods.