Tectonic Zone. Southeast Sichuan Liang Dong Temple Xujiahe Group Of Reservoir Characteristics And Reservoir Prediction

There is no systematic jobs on Xujiahe formation except preliminary reservoir seismic (2D) prediction on Linfengchang-liangdongmiao structure and just one well full of materials of hole logging and well logging among six logging wells and two producing wells .This paper guided by sediment graphics of sedimentology stratigraphy and reservoir geology , based on the observation of the stratigraphic section in field and the observation of bore core and analysis of pore geometry combining with materials of thin section cast observation scanning electron microscope and conventional petrol-physical properties determination , discussed elaborately that sedimentary traits , petrological characters of the rocks , prophisical features and pore structure and deliberated sandstone diagenesis and diagenetic sequence , meanwhile , sequence target zone works stratigraghic correlation and stratigraphic classification ; reservoirs are gained according to study and analysis of fabric feature and facies state properties of underground fluids and reservoir logging calculation and seismic survey was lunched using reservoir seismic and logging modeling building and target zone was marked lies in study of reservoir prediction distribution and breeding actuality .Lithology from Xujiahe member 3^th to Xujiahe 6^th in Xujiahe formation of target zone is block-like argillites shale with sequence thickness about 400m.The member6 is used for producing now. The facies of target zone varies alternatively between bodies and the sand-bodied of target zone piled up by many distributive channel sand and coastal -shallow lake sand bank with medium maturity of structure and component , alongside well developed soft debris rocks such as phyllite darby and argillaceous rock containing organic substance and log lime with little bog limes , also rich in coarse grain adularia and face matrices back filling .Materials above all tells that porosity of target zone is lower than 4% on average and permeability is weaker than 0.01 ×10^-3 um², which defined reservoir as lower porosity and lower permeabity. And microcosmic structure pore-throat is so bad and left original particles pore remains in silica sand occasional with quartz adding surrounding circles and form of reservoir is one dominated by crack and micro-pore.Porosity low limit of reservoir is defines as 3% according to logging correlation and plot...