The Study Of Sedimentary Facies And Reservoir Property Of Cambrian In Leshan～Longnvsi Paleo-uplift Area

Under the guidance of new principles and methods of Sedimentology, Stratigraphy and Reservoir Geology, this thesis takes the carbonatite of Cambrian in Leshan～Longnvsi paleo-uplift area as the main object of study. Through analysis of nine coring wells and two field profiles, the stratigraphic characteristics, sedimentary facies characteristics, reservoir characteristics and controlling factors of reservoir have been researched systematically and deeply. This paper described the distribution of Cambrian and proposed a stratigraphic classification plan which accord with actual production. The petrological characteristic, main types and characteristics of sedimentary facies and the depositional framework have been expounded in Cambrian. Then three types of sedimentary facies group are recognized and their facies models are established. Based on the analysis of individual well and the correlation of cross sections, this paper illustrated the distribution of sedimentary facies in Leshan～Longnvsi paleo-uplift area. Applied the approach of cast thin section, mercury penetration and SEM method etc, the Cambrian reservoir types and characteristic have been confirmed. Further more, the controlling factors of reservoir development have been researched and established the reservoir pore space evolutionary models of two diagenetic evolution. At last, by the method of multi-factors super- position, it is pointed out the favorable reservoir zones.