piedmont

The new finding of two beds quartzitic conglomerate in the Ertix piedmont is sedimentary response with Altay nappe structure.

在额尔齐斯山前地带新发现两套石英质砾岩，是阿尔泰推覆构造沉积响应。

It is proved that the anti-collapse function of the treating chemical in fluid kerite in piedmont drilling is more and more obvious, and the application is more and more widely.

沥青剂在山前钻井中防塌作用越来越重要,应用越来越广泛,但由于其基质沥青成分复杂性及由于各种改性手段应用,使沥青剂室内评价指标与现场应用效果越来越难以统一。