In the clastic reservoirs of west Sichuan Basin, sandstone and mudstone, tight sandstone and loose sandstone can be recognized by megascopic cuttings determination and drill time changes.

在川西地区碎屑岩地层中，砂岩与泥岩、致密砂岩与疏松砂岩可以通过肉眼岩屑鉴定或钻时变化进行识别。