Feixianguan Age Of Longgang District In Northeast Sichuan Group Research On Sequence Stratigraphy And Reservoir Characteristics

The author synthetically applied high-resolution sequence stratigraphy, sedimentology, seismic sedimentology, geology and petroleum geology logging as a guide, on the base of fully understanding regional geological background in Longgang area of the Northeast Sichuan basin and the predecessors research results, integrated rock core, recorded well, measuring well, earthquake and test analysis information, in-depth carried out has the Triassic of Feixianguan group of high resolution layer sequence formation learn and storage layer features research research. Seize Long Gang area Feixianguan group carbonate rock deposition phase with of development evolution and spatio-temporal exhibition cloth features this a focus, in determines Feixianguan group benchmark surface cycles changes recognition flag of Foundation Shang, established has Feixianguan group Taiwan shed deposition system benchmark surface cycles, discussion has layer sequence formation on feixianguan group storage layer of distribution law and its real sexual of control role, on storage layer for classification evaluation, made has many important of awareness.Mainly within the study area of Feixianguan sedimentary facies of carbonate platform, only Longgang10revealed for the deposition of the slopes. Based on the predecessors to research results in a flat on the sedimentary facies distribution determines the scope, Longgang10wells in the North-East direction is Kaijiang-Liangping basin sediments, sediments of South West to the ground, to a carbonate platform of the chrome, open ground and limited ground within two sub phase. Feixianguan formation in Kaijiang--Liangping basin in the late demise, on the end of the influence of the study area.Traditional rock of Feixianguan group formation system of divided four period, on the Bottom of three sections are not accurate in the study area. But based on high resolution sequence stratigraphy analysis principles, identifies multiple base surface lift cycle marker, coupled with relative sea-level changes in the study area, Feixianguan formation can be divided into five base-level cycles, cycles of comparable strong in the region. Sequence from the horizontal and vertical distribution of sedimentary facies and type and strength control of reservoir Diagenesis of reservoir properties, Mesa and Mesa beach bar on the edge of the white clouds and after the dissolution of the development of good reservoir rock.Through the reservoir rock properties, physical properties of data, such as statistics and analysis, the reservoir is divided into4types, while the reservoir has4types development, but in the Longgang District of reservoirs in the Feixianguan group, most development isclass III reservoir.