Abstract：DIVA(Differential Information Velocity Analysis)technique is a seismic oil/gas detection technique.In view of the character of seismic velocity of Ying'ge Sea basin being generally gradualincrease with the depth but locally having the phenomenon of strong velocity decreasing,the paper used the DIVA technique to detect oil and gas in Ying'ge Sea basin. First,drawing out composite DIVA graphs in a principle from shallow to deep based on the velocity graphs in each layer;then drawing out tile DIVA sections from these comlposite graphs based on same principle;finally grading and determining the favorable oil/gas-bearing zones based on reliability of velocity anomaly showed on DIVA sections. The detectioh results of the region showed the DIVA anomalies mainly are I class in shallow layers and mainly are Π class in medium and deep layers.
