The Jurassic sedimentary environment of Yanqi Basin has lots of deep-water sedimentary features in coal-bearing beds. 对新疆焉耆盆地沉积环境的研究发现，其侏罗系含煤系地层具有大量深水沉积特征，与传统浅水成煤的观点相悖。
It is the primary sedimentary characteristics of sandstone and the fine porethroat distribution preponderant through diagenesis modification that caused low permeabili-ty. 砂岩原始沉积特征和成岩作用改造后细孔喉分布优势是导致低渗透的原因。
