The study shows that the swelling clay is the key factor that affects considerably the percolation feature of low permeability reservoir.
分析认为，膨胀性粘土的存在是影响低渗透油藏渗流特性的关键因素；
2
The results obtained in this paper show that groundwater levels rise and fall forcefully impact foundation deformation of swelling sandstone, its dominant factor is change of moisture content.
研究结果表明：地下水位升降对膨胀砂岩地基变形所以有着强烈的影响，其根本原因是含水量的变化。
3
For the Gaomiaozi bentonite tested here, there is an exponential relationship between swelling pressure and dry density; and dry density is an important factor influencing swelling pressure.