沉积盆地内不整合界面组合样式

以塔中地区为例，通过对其多个不整合界面的剖面和平面特征的综合分析，阐明不整合的组合样式和分布特征，探讨了其构造演化规律：经过多次构造运动叠加形成的叠合盆地，发育多个不整合界面。不整合界面的分布和组合具有一定的规律性：从隆起区到拗陷区，分别发育高角度叠合不整合带、低角度削蚀不整合或上超不整合三角带、平行不整合或整合带。不整合的组合样式差异，对油气的运移和储存都有着至关重要的控制作用。结合油气地质条件，预测出泥盆系上超不整合两个有利油气圈闭带。对划分地层层序，确定地层构架和构造期次，分析沉积盆地的形成、特征、演化和后期改造具有重要意义。

SPATIAL PATTERN OF UNCONFORMITIES IN DEPOSITIONAL BASIN

After multidisciplinary analysis of the sectional and planimetric characteristic of the unconformities in the Tazhong uplift，as an example，the spatial patterns and distribution characteristic are elucidated and the structural evolution in the Palaeozoic is probed.In overlapped basins，which usually undergo multiple superposition of tectonic movements，many unconformity interfaces are developed.There are some rules in the distribution and spatial pattern of the unconformities，from the uplifted area to the sunken area，the highangle and superimposed unconformities，lowangle truncated or onlayed triangle unconformities and parallel unconformities or conformities develop respectively.The differences between the spatial patterns of the unconformities are important to control the oilgas migration and accumulation.Considering the oilgas geologic conditions in the Tazhong uplift，the onlap unconformities traps in the Devonian are expected.