A Research On Reservoir Classification Method Of Formation M In JX Area

Reservoir classification is a method that rationally ranks the quality of the reservoir and provides a basis for further exploration and development of oil and gas resources.Nowadays,with the continuous deepening of oil and gas field exploration and development,the proportion of reserves and production in carbonate reservoirs has gradually increased.The oil and gas resources in carbonate reservoirs have become one of China's main oil and gas resources.Reservoir classification is extremely important for the exploration and development of carbonate oil and gas fields.That is related to the preliminary evaluation of oil and gas reservoirs and provides important basic data for further development and planning.The research object of the thesis is the formation M in JX area,and the reservoir lithology is mainly carbonate rock.Due to the influence of diagenesis and sedimentation,the pore structure is extremely complex and the reservoir heterogeneity is very strong,which brings great difficulties to finding high-quality reservoirs.Unclear reservoir division will also restrict the rational development of oil and gas reservoirs.Therefore,in order to develop oil and gas reservoirs more scientifically,reasonably and efficiently,to carry out reservoir classification research for this block is necessary.The thesis collects and sorts out the geology,logging,gas test and experimental analysis data of the target block,combined with the reservoir characteristics and logging response characteristics of the target block,to study the reservoir classification method of the block.On the basis of the research,write programs and compile data.On the basis of the classification method research analyze the reservoir effectiveness.Based on the analysis of the geological profile,lithology,physical properties,electrical properties,pore structure and other characteristics of the reservoir in the target area,it is believed that there are three main types of storage space in the reservoir:dissolved pore type,intracrystalline pore and fracture type.Further analysis of the logging response characteristics of dissolved pores,intracrystalline pores and fractured,and summarize response law of AC,CNL,DEN,RLLD,SP and other conventional logging curves in dissolved porosity,intracrystalline pore and fractured.The reservoirs of different pore types are characterized by the mean value of the porosity spectrum and the variance of the porosity spectrum.The reservoir classification method of electrical imaging logging,the reservoir classification based on Fisher discriminant method,and the reservoir classification through fuzzy comprehensive evaluation are studied.Using the reservoir classification program and processing the logging data of the target block and achieve good results.Finally,evaluate and analyze the effectiveness of the reservoir.