The Kowloon Hills Region Set Of Feixianguan Reservoir Research

Under the guidance of relative theories of carbonatite sedimentology, paleontological stratigraphy, structural geology, reservoir geology and diagenesis, by applying methods of multidisciplinary interpenetration and multidisciplinary comprehensive analysis, and methods of combination of laboratory and field observation, macroscopic and microcosmic view, the stratum, rocks, sedimentary facies and reservoir of the lower Triassic Feixianguan formation in Jiulong Mountain area are researched, which establish a theory basis for the further exploration of this area.Based on the research of formation characteristics, and directed by the theory and method of stratigraphy, we redivide Feixianguan formation in research area. Feixianguan formation is divided into4members:Fei1to Fei3, and Fei3member is divided into upper and lower sub-members. Feixianguan formation was completely developed, had a comformable contact with the upper and lower formation, and every formation had an obvious boundary of top and bottom. The thickness of formation has obvious differences in lateral, the distribution of Fei1to Fei3member and sub-members has relative uniformity, they all has a characteristic that is thick in northeast and thin in southwest, which reflects the evolution of palaeogeomorphology in Guangwang area from landform differentiation to filling and homogenizationThe whole Feixianguan period was a process of regression, and regional evaporite platform sedimentation was shown in Fei4period. With the proceed of regression, tidal-flat facies, limited carbonate platform, carbonate platform, carbonate plateform edge, platform slope and basin facies were gradually developed from south-west to north-east. The platform margin bank in carbonate plateform edge is the phase spresd which is mostly beneficial for the formation and evolution of reservoir.The lithology of Feixianguan reservoir are mainly shoal facies solution pores oolitic dolomite (limestone). The accumulation and permeation space are mainly intergranular dissolved pore and intercrystalline dissolved pore, and secondly intercrystalline pore and moldic pore, just small amounts of fracture and solution cavity are developed. The reservoir has low porosity and low permeability, and belongs to the type of pore and pore-crack. The diagenesis of the reservoir in research area can be divided into destructive diagenesis and constructive diagenesis. Constructive diagenesis consists of micritization, dolomitization, dissolution and rupture; destructive diagenesis consists of cementation, compaction and pressure solution. At the end of the thesis, the formation and evolution process of the reservoir are discussed, the distribution regularity of the reservoir is confirmed and the distribution of beneficial reservoir is predicted.