Study On Sedimentary Facies Of Dalinghe Oil Layer In Central-south Of The West Slope In Liaohe Depression

Under the guidance of new principles, standpoints and methods of Sedimentology, Reservoir Sedimentology and petroleum-geology, this thesis takes the Dalinghe oil layer in central-south of the west slope in Liaohe depression as the main object of study, rests on geology, logging methods, uses the methods of"return contrast,classification control"to classify and contrast the Dalinghe oil layer. Based on the analysis of direction of sedimentary source, sand body distributing characteristic, sedimentary environment types and sublacustrine fan facies sign, sublacustrine fan facies models is established, individual wells and cross wells are analysed. In this foudation, the distributing characteristics of Dalinghe oil layer sedimentary microfacies are studied, the controlling impact of sedimentary microfacies on reservoir physical property is discussed, it concluded that well developed sedimentary microfacies as braid canal is premium reservoir sand bodies; it also concluded that developed reservoir sand bodies in Huannan 4 well,Huannan 5 well and Huannan 7 well region, is the advantageous region as seeking the hiding oil gas reservoir in the future.