Chang6Formmation Reservoir Description In Shijia Area Of Qingpngchuan Field

The study area is located in the East-central shanbei slope of the ordos basin, which is aone of the important region in the Qingpingchuan field.Based.Since the lack of thereservoir characteristics and rules of this aera., It is necessary to strengthen the researchreservoir description of the area geology, sedimentation, reservoirs and development of thecase for further research to better develop oil and gas resources and to guide furtherexploration.In this research, based on the sedimentology, petroleum geology, reservoir geology,logging geology, reservoir description, etc. With logging, laboratory analysis, formationtesting and various geological data and digital modeling techniques.Based on the criticalwells study, the study area were meticulous grained comparison and interpretation of thesmall meticulous structure layer; analysis of the sedimentary facies types and sedimentarymicrofacies distribution; characteristics of reservoir rocks, diagenesis, physical propertiesand pore structure, heterogeneity, sensitivity, overburden pressure and flow properties ofporosity and permeability characteristics were studied.Through analyzing sedimentary facies, including turbidite provenance, the planedistribution characteristic of sedentary microfacies, The sedimentary facies of Chang6reservoir type is delta deposition, the sedimentary subfacies is the delta plain deposition,sedimentary microfacies is the distributary channels and split bay deposition. To use ofphysical analysis, sandstondflakes and mercury porosimetry, analyze reservoir propertiesand microscopic characteristics, reservoir parameters established interpretation model.According to the study, the Chang6reservoir4-property relationship and the results showthat the basic rules of of the low permeability reservoir.Therefor the sedimentary facies arecontrolling factors, lithology control properties, physical properties of the control oilresistance, electrical properties is its comprehensive reflection of the all above.Based on the4-property relationship, established the standards about the permeability and saturation calculation model and the effective thickness of the lower limit. Meanwhile, referring to theporosity and permeability grading standards, combine the physical statistics. This areashould be a low-hole-low permeability~special low porosity-low permeabilityreservoirs, According to the classification criteria of sandstone reservoir properties the Theresults of the study, the Shijia aera is Ⅲb~Ⅲa reservoir which is worse. In the finalanalysis, structure of the area, basic research on sedimentary microfacies, comprehensivegeological, logging and reservoir dynamic variety of information materials, establishedthree-dimensional visualization of the study area geological model.