Abstract:

Sequences of different basins differ considerably in depositional pattern,distribution characteristics.The sequences of foreland basins are mainly dominated by alternation of thrus flexure deformation and unloading,and their distribution is very asymmetric;the sequences in cratonic basins are mainly controlled by eustasy,and coincident in broad extent;the sequeces of inland rift basins are controlled by different scales and different orders of episodic fracture movements,thus resulting in multicycle sequences;sequences of large depressions are similar to those of passive continental margins;those of intermontane basins are related to episodic movement,paleoclimate and source materials;those of piedment fault-depressed basins are related to strike-slip and pull-apart movements.The above mentioned differences are bound to cause considerable differences in types and collocation of source-reservoir-cap rock association.In general,the turning positions between rising and downing processes of the cycles are favourable places for source rooks;the sand bodies formed in semi rising and semi downing cycles are the main reservoirs.

Key words: terrigenous debris, sequence stratigraphy, depositional system, reservoir distribution