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、方解、钙长和等潜在损害物质。

R esults show that the modified cement with good durability, small expansion and low alkality can be made by use of gypsum and zeolite modifying alumina cement.

以和沸对高铝水泥改性，可配制出耐久性良好、具有微膨胀性的低碱度改性水泥。