Type of pore in reservoir is mainly secondary pore space, mainly including intragrain vugular pore and puncta. 喉道类型以片状、弯片状为主;
Vugular pore openings are frequently as large as an ordinary lead pencil and are usually attributed to leaching of the rock subsequent to deposition. 空孔穴开孔通常与一支普通的铅笔一样粗，这是由于沉积后岩石的侵析作用造成的。
