Logging Evaluation Study For Carbonate Bank-Dam On Upper Part Of The Fourth Member Of The Shahejie Formation In Down Block Of Tong 4 Fault In XianHe Oil Field

Certain achievements have been made in oil testing of carbonate bank-dam on upper part of the fourth member of the Shahejie formation.But restricted by the heterogeneity of lithology and physical property,fluid distribution and other multiple factors,the progress of the exploration and development is relatively slowly.Based on the systematic investigation of carbonate bank-dam reservoir logging evaluation methods,collection of geological data,well logging data in the block,the data of core analysis,oil test,and logging data,I looked into reservoir characteristics and reservoir space.And according to the principle of "core calibration logging",lithology identification method and the static parameters of reservoir logging evaluation method is established.According to the “dynamic calibration of static" principle I established logging identification method of reservoir fluid properties,and also determined the cut-offs of physical property and the planar distribution of reservoirs.Firstly,I researched the reservoir characteristics of the area,then studied the reservoir space types of the main lithology according to the casting thin sections and core analysis data.In view of the low coincidence rate of logging lithology,the cross-plot method is used for the identification of single well vertical lithology and the planar distribution of different lithology.I also established the static parameter of logging porosity,permeability,fracture porosity,fracture permeability,saturation of different lithology reservoir and determined the cut-offs of physical property and fluid identification standard of different reservoir.Finally,the plane distribution of different types of reservoirs are plotted,which provides technical support for the exploration and development.