By comparing the numerical results of water infiltration with air and without air , it is shown that the method in this paper is more effective for solving problems of water infiltration in unsaturated soil . in this paper the forming process of oil - bearing basin is the main research object and the mathematic model of geology is built , in order to simulate the dynamic forming process of stratums especially oil - bearing stratum in geology history in the time and space concept , further to investigate the history of petroleum forming , transmitting , accumulating and predict the distributing rule and scope of petroleum , and offer an rapid , quantitative , exact , general choice for the researcher of petroleum geology . with denudation , poor - compactness and sedimentation hiatus , the stratum relations of sedimentation section is judged , and the ancient thickness and pressure of stratum layer are recovered by the inversion method of back stripping . the numerical simulation algorithm of recovery of geological history is also given 為了利用現代化的計算技術再現含油氣盆地的地史演化發育過程,以便進一步定量化研究油氣的生成、運移和聚集的歷史以及預測油氣分布規律、分布范圍,為石油地質學家提供一個快速、準確、定量、綜合的研究手段,本文就含油氣盆地的地史演化發育過程為主要研究對象,建立了數學地質模型,運用優化理論與算法,在考慮了剝蝕、欠壓實、沉積間斷等地質現象的情況下,采用回剝反演法,應用鉆井、測井、地震等方法獲得的地層物性資料,判別沉積剖面中地層的接觸關系,恢復地層的古厚度、古壓力,構造了地史恢復的數值模擬方法。