There are not only illite, but also asphalt, microcrystalline quartz, dolomite, calcite, anorthite, gypsum, and such as potential damage materials.

储层不仅含伊利，还发育沥青、微晶英、白云、、钙长膏等潜物质。

The albite component increases while anorthic component decreases in detrital plagioclase.The plagioclase turned into an end - member component of albite.

斜长碎屑中钠长组分逐渐增多，钙长组分逐渐减少，最终形成纯钠端元的钠长。