| The oils of Liaohe block are various and the reservoir is not good.Accurate identification of oil and gas is difficult.During the beginning exploratory development of oil field,the backward technology of logging and reservoir evaluation methods miss or misjudge some reservoirs,bringing the reservoir interpretation evaluation into the awareness of the errors.These reasons impact the later exploration and development.This study is guided by the theory of sedimentary reservoir geology,combining mudlogging logging earthquake interpretation and other data.Analyse reservoir characteristics of S257 in Damintun Depression.The main development of the block is the deposit of underwater fan.The rock type is mainly composed of the mixed sandstone and litharenite sandstone.Grade of maturity of rock structure and contents are low.The pore between the reservoir is not developed,and the material is poor,belongs to low porosity low permeability reservoir.In addition,the oil type of S257 is high pour point oil.On the basis of the reservoir geological characteristics,using the integral parameter method,oil saturation method,least square method,correlation coefficient method and other methods.Create the standard and the chart for geochemical logging data;determine the criterion of the oil,water and dry layer of the nuclear magnetic resonance T2 relaxation spectra.According to the shape of the map,further implemented the reservoir characteristics and oil content.Because of the high pour point oil in this area,using geochemical logging technology to analyze the core,sample and wall coring carry on secondary evaluation of oil content.Retesting 304 layers/29 wells;have finished testing 54 layers/10 wells.Accumulated reservoir thickness 261.6m,the poor oil reservoir thickness 72.8m.The second evaluation technique of logging data is applied to the calculation of reserves.It can improve the identification accuracy of the oil layer and increase the amount of computing reserves. |
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