In sandstone formations, the acid reacts with the solublesubstances in the formation matrix to enlarge the pore Spaces.
在砂岩地层中，酸与地层基体中的可溶物质反应，以扩大孔隙空间。
2
The repeatability and durability of the method to determine the contents of acidsolublesubstances in medical talc powder (MTP) and the main influence factors are discussed in this paper.