页岩气与深盆气成藏的相似与相关性

页岩气藏和深盆气藏在生、储、排烃以及运移、聚集、压力特征、分布特征等成藏诸要素间密切相关。对比分析表明，这2类气藏的形成都需要大面积、厚层烃源岩，裂缝是其重要储集空间，排烃方式以扩散作用为主，短距离运移，在低孔低渗透储层形成的隐蔽圈闭中聚集成藏；气藏内常具异常地层压力。盆地边缘斜坡是两者共同发育的最有利地区。预测中国南方志留系等富有机质页岩发育区是页岩气藏的勘探潜力地区。

Similarity and correlation on reservoir forming factors between shale gas reservoirs and deep basin gas reservoirs

There is a clear correlation between shale gas reservoirs and deep basin gas reservoirs on reservoir forming factors of hydrocarbon generation, storage, expulsion, migration, accumulation and pressure and distribution features of reservoirs. The correlation shows that their formation needs wide and thick source rocks. Fractures play the role of important storage space. Hydrocarbon expulsion relies mainly on diffusional effect and its migration distance is very short. Cos accumulated in the low-porosity and low-permeability reservoirs in subtle traps. Abnormal formation pressure always exists in the gas reservoirs. The slope in the basin margin is the most favorable area of these two. Shale gas reservoirs may probably develop in organic-rich shale of Silurian in southern China.