Abstract: Vertical seismic profile technique,a bridge connecting seismic section and geologic horizons,can provide reliable data for fine interpretation of structures,lateral prediction of reservoirs and reservoir characterization with surface seismic reflection information.This paper discusses the basic principles of VSP technique,seismic acquisition methods and its functions in exploration;and introduces its applications in providing time-depth parameters,hori-zon calibration and study of near -wellbore structure in Henan oilfield.The problems currently existed are ana-lyzed and some proposals are presented in this paper.