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

储层不仅含伊利石，还发育、晶石英、白云石、方解石、钙长石石膏等潜在损害物质。

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

斜长石钠长石组分逐渐增多，钙长石组分逐渐减少，最终形成纯钠端元的钠长石。