The Sedimentation, Diagenesis And Its Influence Upon The Reservoir Of Feixianguan Rormation In Lower Triassic Series, Northwest Sichuan

Based on the principles of palaeobiology, stratigraphic geology, sedimentology, diagenesis and reservoir geology, taken field profile and drilling cores as research object, and combined with achievement of predecessors, the sedimentary facies, diagenesis essential characteristics of reservoir and controlling factors for reservoir of Feixianguang Formation in northwest sichuan have been comprehensively studied. Both classic and mordern methods have been used in this research. The main confents includes: stratigraphic classification and correlation of Feixianguan Formation in lower Triassic, the rock fexture characteristics, type and forming conditions of rock; determining dirtributary law of the sedimentary facies in vertical and horizontal direction and distribution in plane and the essetial contronling factors through correlation of sedimentary facies transverse profile and regionnal geologic characteristics; establishing plane stereoscopic modle of sedimentary of oolitics beach by studying diagenesis. Finally, the genetic potential and regional distribution of reservoir in Feixianguan Formation have been analysed through the sedimentary facies and diagenesis.