Prediction Of Zhen Bei Chang8Reservoir Geologic Characteristic And Favorable Zone

In this paper,regard the Zhenbei Chang8reservoir Oilfield Block as the researchobject in Erdos basin.To use of the sedimentary petrology, petroleum geology theories,well drilling, well test data as the basis system research. The characteristics of stratum,sedimentary characteristics and tectonic characteristics of sand body distribution,reservoir characteristics, physical characteristics, reservoir "four property"relationship. Through the study of geological conditions on the Zhenbei block thelayer of fine description, established the three-dimensional geological model ofreservoir, each layer porosity permeability and saturation property parameters aredescribed, and then the favorable zones were predicted for the block development.The following research results and knowledge gained through the study of thispaper:1. Zhenbei oilfield Chang8reservoir group of delta front facies, mainlydeveloped four sedimentary microfacies, distributary channel, mouth bar, sheet sand,distal bar and interdistributary bay, the main long811, long812-1, long812-2small longchannel sand layer body occupies the main body position, is the the best reservoir areaand the main formation, mouth bar, sheet sand times.2. Zhenbei Chang81reservoir matrix with feldspathic lithic sandstone and lithicfeldspar sandstone, mica and silica based; cements are mainly iron calcite andankerite; reservoir pore intergranular pore and intragranular dissolved pore. Theaverage porosity is9.3%, average permeability is1.7210-3μm2, reservoir physicalproperties are generally poor sandstone, and belongs to the low porosity and lowpermeability reservoir sandstone. Displacement pressure average was1.43MPa,average pore throat radius of0.71μm, median pressure average7.43MPa, average of83.47%largest mercury saturation;3. To establish reservoir in the region of “four properties relationship” geologicalconstraints using four reservoir evaluation. By drawing the porosity and permeabilityof intersection diagram template to have a further understanding of the physical distribution, the physical parameters are controlled by the sedimentary faciesdistribution, good reservoir facies result the properties is good.4. According to the study on the sedimentary tectonic background, sedimentarymicrofacies, reservoir characteristics,"four properities". Combined with the currentstatus of the development zone exploration and oil testing information, partition theestablishment of reservoir identification chart and productivity prediction charts, givethree kinds of reservoirs and preferably8built favorable zone, ZhenBei long expected81can be built to produce68x104t.