To raise wire-line drilling efficiency need to: 1. Select casing diameter and depth according to drilling depth, diameter, strata drilled and rock integrity, structure features, weathered layer depth;
Qianceng stone is also called the overburden rock, belongs to Marine facies sedimentary crystalline dolostone, stone is hard and dense, appearance has weathered layer is very thin, soft;
千层石同样也称为积层巖,属于海相沉积的结晶白云巖,石质坚硬致密,外表有很薄的风化层,比较软;
Weathered layer absorbs seismic waves greatly. Compensation for the absorption due to weathered layer can improve resolution of seismic data.
风化层对地震波的吸收十分强烈,补偿风化层对地震波的吸收,可以提高地震记录的分辨率。
Qianceng stone is also called the overburden rock, belongs to Marine facies sedimentary crystalline dolostone, stone is hard and dense, appearance has weathered layer is very thin, soft;