, dissolve 0.681 of losing etc.), store layers of penetrance ascensional range above 20% employ ,, and the term of validity is long.

• 通过一系列筛选实验认为，小分子阳离子粘土稳定剂与地层配伍性好，防膨效果显著（防膨率84.；6%25，溶失率0