Abstract:In a process of oil-gas exploration in Yanqi basin,we always follow the prospecting process,which is geophysical prospecting first and achieved a good result.In early days of exploration,the first parametric borehole of the basin has been defined by using integrated geophysical prospecting technique,the drilling results not only revealed the conditions of source rock,reservoir and cap rock in the basin,but also discovered Baolang oilfield.Afterwards,well Blwas deployed by using structure-sequence stratigraphic interpretation technique,with founding Baobei oil-bearing block.Adopting the velocity-varying mapping technique in the light of the character of severe varying velocity in that region,the structural attitude of Benbutu anticline has been clearly clarified and geologic reserve has been further ascertained.The structural interpretation and reservoir prediction technique is mainly used in a process of discovery and exploration of eastern Benbutu oil-bearing.block.The key factor of having excellent results in a process of oil-gas exploration in Yanqi basin is to adopt correspondent geophysical prospecting technique in a different exploration stage and aimed at different exploration objects.