摘要
在对四川盆地西部中坝须二气藏地质特征进行描述后,发现该气藏的含气带与含水带之间存在一条致密带。致密带的储渗条件相对上、下两带差。通过对该气藏的成藏过程分析后,认为其并非为前人所认识的构造圈闭气藏,而应为构造-成岩复合圈闭致密砂岩气藏。
This paper deals with the geologic characteristics of Zongba X-Ⅰ gas pool in the west partof Sichuan Basin. The tight borizone is found between the gas bed and the water bed. The porosity andpermeability of this horizone are lower than that of the upper and lower beds. The study of formationprocess of the gas pool shows that the traps are not of tectonic but of tectonic-diagenetic type of tightsandstone gas pool.
关键词
砂岩
气藏
成藏机理
天然气
四川
tight sandstone gas pool
formation mechanism
tectonic-diagenetic trap
