Research On Sequence Stratigraphy Of Damoguaihe Group In The Western Rift Of Beier Depression

In this paper, Guided by the theories of sequence stratigraphy, sedimentology, petroleum geology, combined with seismic, well logging core, etc., on the western Rift Beier Depression Damoguaihe Sequence Stratigraphy framework, sedimentary facies, reservoir depth and meticulous research.The use of sequence stratigraphy, sedimentary evolution in the formation of unconformity marked contrast between wells based on the principle of achieving a large Damoguaihe top and bottom interface layer and seismic drilling unified interface, the establishment of sequence stratigraphic framework, on this basis, will exceed the internal sequence is divided into five sedimentary period of 13 four sequences, the lowstand system tracts (DⅠlsequence); the transgressive system tracts period (DⅠ2 and DⅠ3 sequence); the early stage of highstand system trarcts (DⅠ4 and DⅠ5 sequence); the middle stage of highstand system trarcts (HST) period (DⅡ1,DⅡI2,DⅡ3,DⅡ4 sequence); the late stage of highstand system trarcts (HST) period (DⅡ5,DⅡ6,DⅡ7,DⅡ8sequence), analyzed and summarized the characteristics of each system interface domain.Study area identified 4 types of facies,15 types of sub facies and 26 types of micro facies; also for the source area and more rapid change phase with characteristics such as waveform clustering methods to reservoir prediction, depicts a 13 four sedimentary sequence of the phase diagram, and summarize Damoguaihe Sedimentary evolution and depositional model of Fig.According to characteristics of the reservoir and cap rock, combined with analysis of petroleum geology,Damoguaihe Formation is divided into three sets of reservoir.cap combination, There are 3 favorable zone in the first one,2 in the second one and 3 in the third zone respectively and 6 of the optimal objective optimized...