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。
The result shows that equivalent depth method has a good effect on the layer with abnormal pressure, which the one-dimensional compaction theory is more applicable.
结果表明，等效深度法对于存在异常压力层段的地层效果比较好。而一维压实理论则具有较好的适用性。
The dynamic pressure on pattern wall can reflect indirectly the compaction degree of sand during the course of filling and compaction of sand on EPC.
消失模铸造干砂充填紧实过程中，干砂对模型壁的动态压力可间接反映此处干砂的紧实程度。
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