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在盆地模拟中，利用“回剥”技术恢复古埋深，关键在于确定地层古孔隙度演化关系式。确定古孔隙度的传统方法（等效深度法）仅适用于无间断匀速沉积的地层，对于埋藏史复杂的地层计算结果误差较大。为此，提出同时考虑地层埋藏时间和埋藏深度对孔隙度演化的影响，即采用孔隙度埋藏时间、孔隙度埋藏深度关系式作为计算孔隙度的函数，并利用数值积分法，计算出地层的骨架厚度值，然后利用回剥技术，计算地层古埋深。在进行数值积分时，可以根据研究精度的需要，确定合适的步长。此方法在东营凹陷的应用表明，计算结果的准确度、可信度要高于传统的计算方法。图１表１参７（梁大新摘
In the basin simulation, the key point is to determine the paleo-porosity evolution of the formation by using the technique of “back stripping” to recover the ancient buried depth. The traditional method of determining ancient porosity (equivalent depth method) is only applicable to the formation without discontinuity deposition, and the error of calculation results is relatively large for the formation with complicated burial history. Therefore, it is proposed to consider the influence of burial time and burial depth on the evolution of porosity. The porosity-burial time and porosity-burial depth are taken as a function of porosity and numerical integration method is used to calculate the formation The thickness of the skeleton value, and then use back-stripping technology to calculate the depth of the ancient buried layer. In the numerical integration, according to the needs of research accuracy, determine the appropriate step. The application of this method in Dongying depression shows that the accuracy and reliability of the calculation results are higher than the traditional calculation methods. Figure 1 Table 1 Reference 7 (Liang Daxin Abstract