Abstract:

Sedimentary basins of China underwent post-sedimentary alteration.The alteration could be divided into five stages,i.e.,tiny,feeble,medium,strong and bally strong alteration stages,and each of them resulted in comparative alteration basins.The shrinking,dying out of sedimentary basins were closely linked to the evolution of tectonic stress fields of the place they located.Altered by compressive stress field,sedimentary basins could form three kinds of alteration basins,namely reversal,successive and strike slip type alteration basins.Since they have different charateristics in source resevoir cap rocks and distribution as well as in preservation states,it thus suggests that the thoughts and methods on petroleum prospecting of each kind of alteration basin must be different.

Key words: alteration basin, remained basin, alteration stage, stress field, oil gas exploration