In the stage of compaction by initial damage, density damage increment of sandstone is positive and the rate ia positive.
在初始损伤的压密阶段,砂岩的密度损伤增量为正值,速率也为正;
2
Researches show that in the early stage of sandstone diagenesis, compaction, pressure solution, cementation and replacement reduce both the porosity and the permeability.
研究表明,砂岩层内的早期成岩作用(压实、压溶、胶结和交代作用)使孔隙度和渗透性降低。
3
The Tertiary in the Aerjin Slope in Caidam Basin is characterized by strong carbonate recrystallization, weak compaction, weak quartz overgrowth and enrichment of the early-stage carbonate.