Fing Reservoir Description Of Chang6₂～1 Stratum In Jingan Oilfield At Block Wuliwan 1

With the example of the sandstone reservoir in Jingan oilfield at block Wuliwan 1 in the chang621 stratum ,the method and the principle to finely describe the triphibian sandston reservoir,and research of facies-contolled model and reservoir porosity are studied in this paper..The research of the example is based on the well data,including drilling , rock-core analysis, log, production and the parameters of reservoir obtained from the well data. Research porosity structure of reservoir formation is importance way for understand formation and improve oil development,So, the paper classified the type,size distributon and structure of porosity of reservoir in research block. Jingan oilfield wuliwan 1 block chang62' stratum is high porosity and low permeate oilfield.Then,beginning with the microfacies,signs of sediment facies,including rock's colour,sediment structure, granularity distribution,fossil and so on,are studied.After anayzing the cause of sand body shape and log,with the hydrodynamic viewpoint,make three section cross the research block,then make sure microfacies distrubitions space.Based on the single well facies analyzed and take statistic method.contrast large numbers of log data to porosity.coefficient of permeability,content of water saturation.content of pulpy for different sediment facies.The results indicated:sediment facies controlled parametes distribution of reservoir,the research block coincide "facies controlled" model.Eever sediment facies's parametes fix quantify model was built by frequency density function.based on the model,we con calculated different parametes distribution by Monte Carlo simulation method for plane or section with their's attribution known, reservoir characteristic was evidence controlled by sediment facies.Based on the study above.the geology foundation based on which make correct decision for developing the block and improve the developing effect is afforded.