SEQUENCE STRATIGRAPHIC MODELS AND THEIR APPLICATIONS TO OIL-GAS PROSPECTING AND EXPLORATION IN THE LATE STAGE OF THE DEVELOPMENT OF THE FORELAND BASIN IN THE WEST JUNGGAR BOUNDARY MOUNTAIN AREA, XINJIANG

During the Late Carboniferous to Jurassic, the foreland basin in the West Junggar boundary mountain area, Xinjiang shows a depositional evolution from an early stage (from Late Carboniferous to Permian) and a late stage (from Triassic to Jurassic). This paper has presentedthe growth sequence models for the basin on the basis of the qualitative study of the genetic mechanism and evolution of the foreland basin in its late stage of the development and the sequence stratigraphic models for the foreland basin during the Triassic and Jurassic on the basis of the study of sequence stratigraphy in the study area. The present paper also deals with the typomorphic features of the type 1 and 2 sequence boundaries in the indented continental basins and suggests the models for the depositional systems tracts and lake-level curves which may be applied to the prediction of oil reservoirs.