Study On Sedimentary Facies Of K1 Block During Early And Middle Cambrian

The Tarim Basin is a large composite superimposed basin, Tazhong area located in the middle of the Tarim Basin’s central hinterland.The research of this thesis focuses on ka 1 block,which located in the middle of Tarim Basin’s central uplift.Predecessors have done a lot of research on Tazhong area,but they are mainly concentrated in the Ordovician and the upper strata,less for the Lower Cambrian layers.The main reason that restrict the study of the Lower Cambrian layers is the wells which drilled through Cambrian in Tazhong area not enough,so we can’t do seismic analysis combined with drilling data.The thesis through analysis and summary of previous studies,get the tectonic paleogeographic pattern of early and middle Cambrian in Tazhong area,and then launch the tectonic paleogeographic pattern of ka 1 block which has the similar tectonic evolution with Tazhong area during the same period,analyze the general types of sedimentary facies,in order to support the Scientific research conclusion in the latter.For example of He 4 well and Kang 2 well,combining well data and seismic data to analysis the two wells’ sedimentary facies during early and middle Cambiran,to found that there is a certain correspondence between the seismic RMS attributes such as attribute value and continuity and sedimentary facies.On this basis,combining with RMS attributes diagram of ka 1 3D seismic block to analysis ka 1 block’s distribution of sedimentary facies during early and middle Cambrian.