坡折带理论在海拉尔盆地乌东斜坡带隐蔽圈闭勘探中的应用

APPLICATION OF THE SLOPE-BREAK THEORY TO SUBTLE TRAP EXPLORATION OF WUDONG SLOPE IN HAILAER BASIN

基于海拉尔盆地乌东斜坡带缺乏系统特征研究的现状,依据坡折带的成因类型、坡折带的产状变化和组合样式,应用坡折带理论研究证实:乌东斜坡带存在构造坡折、沉积坡折、侵蚀坡折3种类型;运用储层预测技术,发现沿斜坡带发育多套横向连片纵向叠置的扇体。综合研究认为:断陷湖盆中的构造坡折带,对隐蔽圈闭的形成与分布具有重要的控制作用。

For Wudong Slope of Hailaer Basin, the research on systematic characteristics is very poor. However, the research on the slope-break theory illustrates that there are three kinds including structural, depositional and erosional slope break in the slope according to the genetic type, occurrence change and combination style of the slope break. In addition, many series of laterally widely distributed and vertically superimposed fan body, which develop along the slope, have been found by means of reservoir prediction research. These researches consider that the structural slope break of rift lacustrine basin has an important effect on the formation and distribution of subtle traps.