Research On Diagenesis And Physical Properties Of Reservoir Of The Third Member Of Shahejie Formation In Qibei Slope

QiBei slope is located in the southwestern of QiKou depression, exploration workhas made some progress, basic information and preliminary results recognize the rich,From a macro point of view, Laid a favorable foundation for the spatial characteristicsof the north slope of the overall study differences in the deep reservoir sandstonediagenesis and reservoir. ShaHe-3member of strata deeply buried, sandstone buried togreat depth, diagenesis and other factors have a large impact on sandstone reservoirspace characteristics. How systematic analysis of the diagenesis, deep reservoircharacteristics in the fine description, related to the future new understanding of thedeep reservoir.For the problems in the exploration process, In this paper, use of core observation,seismic, logging, etc. for studying of QiKou slope sedimentary facies. Ordinary thinslices, casting thin sections, scanning electron microscopy (SEM), X-diffraction,cathodo luminescence microscopy analysis, isotope analysis, physical propertiesmeasured, mercury injection the idea of combining, carry out the rock characteristics,diagenesis and regularity of the reservoir properties, Made a lot of new knowledgeand results.Qibei main types of sedimentary facies of braided river delta plain, braided riverdelta front, delta plain fan, fan delta front, shallow lake, deep lacustrine. Developmentof sedimentary microfacies distributary channel, interdistributary bay, underwaterdistributary channel, subaqueous distributary Bay, estuary dam; The main rock typesof the study area, arkose, lithic arkose, feldspathic lithic sandstone, lithic sandstone.ShaHe-2member of the rock composition is higher compared to ShaHe-1andShaHe-3member; The main diagenetic types of study area,: compaction, cementation, metasomatism, dissolution. ShaHejie-3member of the sandstones in the middlediagenetic, a few in the middle diagenetic stage B; Main reservoir space types:primary intergranular holes, secondary intergranular pores, intragranular porosity,molded holes and cracks, less primary porosity and secondary porosity development;Es3is low porosity and low permeability-low permeability reservoir, study area a totalof four pore development zone, respectively in the2000m-2400m,2800-3200m,3600m-3900m,4500m below.On the basis of sedimentary facies,diagenesis, physical characteristic, The reservirof QiBei slope is divided into three categories: the reservoir of class Ⅰ, Class Ⅱreservoirs, III class reservoir, The II, III class reservoir of study area, Class Ⅰreservoir less range.