摘要
以松辽盆地扶新隆起带东缘泉三段高弯度曲流河沉积为例,综合岩心、测井、现代沉积及动态分析等多种资料,以定量构型分析为手段,选取典型层段比较各级次构型单元间的差异特征。在泉三段基准面旋回整体上升过程中,各小层复合河道砂体叠置样式由鳞片席状向条带、串珠状过渡。密井网解剖结果结合定量地质知识库推算了泉三段14,17和20小层单一曲流带（五级）平均规模,其中14小层单一曲流带规模较大,平均宽度为568 m,平均波长为833 m。自旋回过程使得不同的层序演化阶段下点坝内部岩相组成、点坝规模间存在较大区别,14小层内平均点坝厚度、规模最大。扩张、旋转作用使得点坝内部结构复杂,各层内点坝侧积层具有厚度小和倾角小的相似特征,侧积体规模均在25~75 m之间,表明各小层间单砂体级次（四级）的构型差异性最为显著,单一曲流带（五级）、点坝内部三级构型差异性不甚明显。以表征的五级、四级及三级构型的定量规模为约束,通过相控和人机交互的储层构型建模方法,建立能够反映研究区储层构型空间差异性特征的三维地质模型。
Taking the high sinuous meandering river of Quan 3 formation in eastern Fuxin Uplifting of Songliao Basin as an example, the architecture differences were analyzed in typical layers with the method of architecture analysis by integrating the core, well logging, modern deposit study and performance data. With the increase of the base-level cycle process, the compound sandbody of various layers turns from strip pattern to band and beaded pattern. On the basis of the recognition of single meander belt from compound sandbody, the differences of average dimensions of meander belt were deduced among 14 th, 17 th and 20 th layer. The 14 th layer has the greatest single meander belt, with the average width of 568 m and average wavelength of 833 m. The autocycle process leads to the differences in internal lithofacies proportion and dimension of point-bar during different sequence evolution stages, which makes the average thickness and scale of point-bar in 14 th layer the biggest. The expansion and rotation mechanism make the internal structure complicated in the development of point-bar, and the lateral accretion shale has the characteristics of thin and slow dip in common, with the width of lateral accretions ranging from 25 m to 75 m. It is indicated that the fourth-order architecture elements show significant difference in each layer, but the differences of fifth-order and third-order architectural elements are not significant. Under the constraint conditions of quantitative scale in different architecture units, a geological model is made to show the architecture differences by the method of facies-control and human-machine interactive.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第5期1637-1648,共12页
Journal of Central South University:Science and Technology
基金
国家科技重大专项(2011ZX05015)~~
关键词
构型差异
点坝
泉三段
扶新隆起带
architecture differences
point bar
Quan 3 formation
Fuxin uplifting
