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以砂泥互层正常压实模型为基础。提出一种新的地层骨架密度计算公式。与现行的计算公式相比，新的计算公式符合骨架体积、骨架质量不变原理，已知现今地层的孔隙度－ 深度、密度－ 深度函数，便可计算基底之上某一厚度的地层骨架密度，并且可以替代压实前的相应的古地层骨架密度，参与构造沉降量所必须的地层古平均密度的计算。现行的地层骨架密度公式仅仅考虑含砂率对地层骨架密度的影响。新的计算公式则综合了含砂率、总的砂岩平均孔隙度、总的泥岩平均孔隙度３ 个重要因素，它们对地层骨架密度的影响，直接反映在地层平均密度、平均孔隙度的变化上，即地层骨架密度最终由地层平均密度和平均孔隙度所决定。
Sand and mud interbedded normal compaction model based. A new calculation formula of formation skeleton density is proposed. Compared with the current calculation formula, the new calculation formula is in line with the principle of the skeleton volume and the skeleton quality, and the porosity-depth, density-depth function of the present formation are known to calculate the formation skeleton density of a certain thickness above the substrate , And can substitute for the corresponding paleostratigraphic skeleton density before compaction and participate in the calculation of the paleo-mean density of the formations necessary to construct the settlement. The current formation skeleton density formula only considers the effect of sand content on the formation skeleton density. The new calculation formula combines the three important factors including sand content, average sandstone porosity, total average porosity of mudstone, and their influence on the formation skeleton density, which is directly reflected in the change of formation average density and average porosity , That is, the formation skeleton density is finally determined by the formation average density and the average porosity.