微伏古隆起对滩坝砂体分布的控制作用——以东营凹陷八面河地区面120区沙四段为例

On the Role of Mini-Bending Palaeohigh in Controlling Distribution of Beach-Bar Sandbody

东营凹陷八面河地区面120区沙四段各砂组沉积时期的精细古地貌,为一北东走向、北西倾的宽缓古隆,隆上发育多个微伏古隆起,相应单砂体分布基本与微伏隆起发育耦合,砂体分布存在滩连滩、滩外滩、滩叠滩三种模式。

In Bamianhe area of Dongying Depression, the fine ancient landform, which was formed during the period of sand formation sedimentation of Sha--4 Member in Mian--120 Block, is a relieved palae--bulge which is NE orientation and NW pitch and where multiple mini--bending palaeohighs have developed. Relevant distribution of single sand body is generally coupled with developmem of mini--bending bulge. The distribution of sand body consists of three patterns.