Abstract:In this paper,taking the Permian stratum of the north Sichuan Basin as an example,combining the analysis method of sequence stratigraphy with the analysis method of wave processes,the quantized method that studies the imperfection of sedimentary record by using the analysis method of wave processes has been put forward.This method can describe quantificationally heave motion accurately during the course of basin evolution and can renew the course of sediment-denude without record in stratum and then analyse quantificationally the course of sediment-denude,calculate the erosion amount of discontinuity,and understand their distribution law of space-time.At the same time,a set of basal and important figures have been worked out,for example,the space distribution diagram of main unconformity,the contour diagram showing denuded amount,the contour diagram showing original ply,the denuded amount distribution diagram of structures of in different epoch.All of these figures are based on many actual drilled wells and the analysis of wave processes of manmade wells and the interpretation of seismic sections.The above analysis gives the basis of further study of basin systemic analysis and basin simulation,and also can specify the variety law of reservoir bed,centre of sedimentation,capping bed,source bed in space-time combined with the study of sedimentary facies and the analysis of tectonic style.The heave wave process of sedimentary basin directly influences buried history,heat history,create and blowout hydrocarbon history of basin.So,the analysis of wave processes can not only correctly set up the geological model of basin evolution,but also correctly recognize the law of the form and distribution of hydrocarbon,then instruct the exploration of oil gas effectively.