哈萨克斯坦鲍金根地堑卡拉甘塞组坡折带控砂作用

哈萨克斯坦鲍金根地堑西斜坡坡折带发育。为了总结该区卡拉甘塞组坡折带的控砂机制及模式,依据地震剖面特征及坡折带成因机制,将卡拉甘塞组坡折带划分为断裂坡折带和挠曲坡折带,平面上分为高位坡折带、中位坡折带和低位坡折带。并取得一些认识:断裂坡折带是该区主要坡折带类型,对砂体平面和空间分布的影响,主要体现在宏观控制作用、砂体沉积导向作用、局部砂体富集作用以及砂体成因的控制;中位坡折带是卡拉甘塞组砂体主要分布区;基于坡折带对砂体控制作用的分析,建立断控模式、沟控模式和坡阶模式等3种控砂模式。以上控砂作用及模式对研究同类型地堑斜坡砂体分布规律具有一定的指导和借鉴意义。

Control of Slope Breaks of Karagansky Formation on Sand Bodies in Baojingen Graben,Kazakhstan

Development of slope break in western slope of Baojingen Graben, Kazakhstan. In order to summarize the mechanism and model in slope break of Karagansky Formation. According to the characteristics of the seismic section and the genetic mechanism of slope break, the slope break of Karagansky Formation can be classified as fault slope break and flexure slope break, the plane is divided into high slope break, middle slope break and low slope break. And some understand has been made.The fault slope break is considered to be the main type in this area. The influence on distribution of the sand body in lateral and vertical is mainly reflected in which includes the role of macro-control, the sand body deposition guiding function, the local sand body enrichment and the sand body genesis. The middle break is the main distribution area of the sand body of Karagansky Formation. Based on the analysis of the control effect of slope break on sand body, three kinds of sand-body control models are established, such as the break control mode, the groove control mode and the slope step mode. The above sand control modes have certain guidance and reference significance for studying the sand body distribution rule of the same type of garden slope.