(一) 引言 碳酸盐沉积物的孔隙率和渗透率在其致密和石化的过程中有一定的变化,并进一步在淋滤作用、胶结作用、交代作用下发生很大的改变。在成岩过程中,孔隙率和渗透率的类型和数量甚至可以变得不再能产出油气。需要研究岩石现有的孔隙几何,以便断定这一岩石是否能产油气以及在什么条件下产油气。 (1) Introduction The porosity and permeability of carbonate sediments have some changes in the course of their densification and petrification, and further change under the action of leaching, cementation and replacement. During diagenesis, the type and amount of porosity and permeability can even become no longer able to produce hydrocarbons. The existing pore geometry of the rock needs to be studied in order to determine if the rock can produce oil and gas under what conditions.