【摘要】 在系统对比了页岩气储层与常规储层异同点的基础上,以我国南方古生界页岩为主要研究对象,应用野外露头观察、钻井取心和实验测试等分析手段,从吸附气储集性能和游离气储集性能两方面探讨了页岩的含气特征。研究结果表明:我国南方古生界页岩w(TOC)主体为2%～10%,最大吸附能力主体分布在1.0～2.0 m3/t,埋深大于1 000 m时页岩吸附能力基本稳定,受温度、压力的影响较小,吸附气含量的主控因素是有机质含量和地层压力。借助毛管压力法分析认为,页岩储层孔隙结构有致密基质型、微裂隙型和过渡型3种类型,分别具有不同的含气特征。更多还原

【Abstract】 On the basis of a systemic comparison of shale gas reservoir and conventional sandstone reservoir,the Paleozoic shale in the south of China was studied to investigate the gas-bearing characteristics by using the methods of outcrop observation,drilling shallow hole and sample testing.The results show that in most of the shale samples,TOC content mainly distributes in 2%-10%;the Langmuir volume distributes in 1-2 m3/t;under the burial depth of 1 000 m,the adsorptive capacity becomes relative stable,changes little with pressure and temperature increasing;The main controlling factors of adsorptive capacity are TOC content and the strata pressure;There are three types of storage space in the shale: the matrix type,the transition type and the micro-crack type,each type shows unique gas-bearing feature;The fracture density of shale core in the well YY1 is influenced by the brittle mineral content.更多还原