| The Y284 area is a typical ultra-low permeability reservoir.The fractures in this reservoir are developed,which leads to problems such as fractured water breakthrough and rapid production decline during oil production process.In order to improve the oil recovery of this ultra-low permeability reservoir,it is urgent to investigate the reservoir fractures,establish a three-dimensional geological model of dual-porosity media reservoir,characterize heterogeneity of ultra-low permeability reservoirs and guide the reasonable development and adjustment of the target reservoir.In this thesis,the basic characteristics of natural fractures in Y284 area are systematically analyzed based on the results of core observation,similar outcrop investigation,and the interpretation results of imaging logging.And then,based on the principle of grey correlation and well logging data,the identification method of nature fractures is established using core calibration logging technology,which can be verified by dynamic monitoring results such as tracer testing.In addition,combined with the results of natural fracture identification and micro-seismic monitoring,the 3D geological model with matrix-nature fractures-hydraulic fractures is established.Finally,comparing the effect differences of three adjustment methods by reservoir numerical simulation,the optimal adjustment method for dual-porosity media reservoir development is selected,which is repeated fracturing of production wells and converted production of injection wells.The technical parameters of water flooding development are designed and optimized,which can provide some guidance on water flooding development adjustments in Y284 area.The research results of this thesis not only have the guiding significance for the oil development and adjustment of the ultra-low permeability reservoir for this Y284 area,but also have a certain reference for the development and adjustment of similar oil reservoirs. |
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