A New Method For Estimating the Removed Thickness Of Sediment And Paleogeothermal Gradient By Fluid Inclusions

摘要

In the process of the formation and evolutionrnof sedimentary basins，sediment lithology，drainagerneffect，the burial characteristics of rock and fluid，rnfracture characteristics and geothermal field ，rnpressure field,etc.，will change，and the magnitudernof denudation is related to the degree of thisrnchange.The restoration of the removed thickness ofrnsediment is the precondition to study burial history，rndepositional history and the hydrocarbon generationrnhistory in basin.Though many methods can bernapplied to calculate the removed thickness currently,rnmainly including correlation of strata ， apatiternfission track dating，acoustic transit time，vitriniternreflectanc (Ro)，etc.，they have many hypothesesrnand limititation in some detailed area，and it is arnnew approach to calculate the removed thickness ofrndenuded sediment by fluid inclusions.In this paper，rnthe erosion thickness of Yingcheng Formationrn(K1yc) in Xushen 1-203 well in Songliao Basin，rnwould be restored by fluid inclusions，and provide arnmore accurate，easier method to restore erosionrnthickness.