Abstract：Electro-imaging logging technique has its upique superiority in studying complex lithologic reservoir(especially the fractured and porous-cavernous reservoir).The reason is mainly adopting sampling with high density and high-resolution imaging processing，so that can be used for identifying fractured parameters and determining fracture-developed zone in a condition of more borehole. Using electro-imaging data，the paper uses ELAN program and program of pore spectrum analysis to analyze and study secondary porosity of Budat formulation in Hailar basin. The electro-imaging image is transformed into porosity image by quantitative computation of high conductive fracture; the influence of the cement index rn and the cut-off factor on secondary porosity is gained by sensibility analysis of secondary porosity，which provides foundation for the selection of parameters in practical processing. The analysis of fractures and secondary pores in Budat formation shows that the method improves the precision and coincident degree of interpretation that has been proved by data of the testing of well.
