心滩储层内部构型分析

储层的内部构型是控制剩余油分布的关键地质因素。本文主要利用岩芯和测井资料,以落淤层的精细刻画为突破口,通过解剖砂体内部结构单元,对高尚堡油田高浅南区馆陶组辫状河心滩储层进行了内部构型分析。从沉积规律分析入手,总结了心滩的内部构型模式,提出将心滩横向分为头部、尾部、翼部和主体4部分,纵向分为垂积体、落淤层和垂积面3类构型要素。高浅南区馆陶组辫状河心滩储层的落淤层主要为泥质夹层和物性夹层,且在心滩头部落淤层发育很少或不发育,分布于心滩尾部的落淤层则呈小角度状产出,平均倾角为0.8°,分布于心滩翼部的落淤层的倾角较大,平均为4°;垂积体厚度一般为0.8～3.6 m,平均为1.7 m,具有横向变化较大的特点。

Analysis on Internal Architecture of Batture Bar Reservoir

The internal configuration of the reservoir is the key geological factor to control the distribution of remaining oil.This paper makes a detailed study on the characteristics of batture bar of braided river based on the analysis of the core data and the logging data.According to previous researches and the deposition law of batture bar,the internal architecture model was concluded.The batture bar can be divided into four parts including the head,the tail,the wings and the main in the horizon,and it can also be divided into three parts including the vertical accretion body,the off silt layers and the vertical accretion surface in the vertical.The off silt layers of Guantao formation mainly consist of physical intercalation and mud intercalation in Gao Qiannan area,and there are little or no development in the head,but a certain amount in the wings and the tail.The inclination of the off silt layers is smaller in the tail,with an average inclination of 0.8°,and larger in the wings,average inclination 4°.The thickness of vertical body varies greatly,usually from 0.8 to 3.6 m averaging 1.7 m.