盆地后期改造阶段与应力场演化

POST ALTERATION STAGES AND STRESS FIELD EVOLUTION OF BASINS

刘晓祥 刘池阳 赵重远 何娟

Liu Xiaoxiang Liu Chiyang Zhao Zhongyuan He Juan

中国沉积盆地后期改造强烈,大致可划分为5 个阶段,即微改造阶段、弱改造阶段、中等改造阶段、强改造阶段和极强改造阶段,并各自形成相对应的改造盆地。沉积盆地的萎缩、消亡与所处构造应力场的演化息息相关,在后期以挤压应力场为主的改造下,可形成逆转型改造盆地、递进型改造盆地和走滑型改造盆地三类。由于各类改造盆地的生储盖展布特征、保存状态存在较大差异,因此在油气勘探思路和方法上不同。

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.

10.11743/ogg19990304