Abstract:

Thrust belts of foreland basin are  very important exploration fields for oil and gas in the middle-west of China. But, the geological condition of the surface and underground is complex. It is difficult for seismic acquisition and processing. There exist a series of technique problems in structural interpretation. It is difficult to identify structure style and geological pattern exactly. Because seismic velocity changes vertically and horizontally, it is difficult to exactly identify structural trap shape. To be aimed at the difficulties of structural interpretation in the south of Jiuquan basin, we apply the structural interpretation techniques of thrust belts and deepen the recognition of structural characteristics. The results direct the oil and gas exploration in the basin and get preferably exploration effect. 

Key words: Jiuquan basin, foreland basin, thrust belt, structural interpretation technique, application effect