川西前陆盆地须家河组发育的辫状河三角洲前缘砂体是研究区主要的储集砂体,其砂岩主要为富杂基、富岩屑的石英砂岩及岩屑砂岩,砂岩结构成熟度中等到较低。野外观察以及(铸体)薄片等分析研究表明,该区须家河组储层属特低孔特低渗致密性储层,以次生溶孔为主,以Ⅱ、Ⅲ类储层为主,Ⅰ类储层较少。

The sand bodies of the braided delta front are the main sandstone reservoirs of the Xujiahe formation in the western Sichuan foreland basin.The sand bodies are consisted of quartz sandstone and lithic sandstone with abundant impurity and lithic fragment.Field observation and(cast) thin-section analysis indicate: the reservoir of area is low porosity and low permeable reservoir.The main type of pores is the secondary porosity.The result of the successive research indicate: the types of reservoir in Xujiahe.