湿地扇扇中辫状水道沉积微相-岩石相划分方法

综合应用岩心、测井、分析化验等资料,对湿地扇扇中辫状水道粗碎屑沉积特征进行了详细研究,提出了沉积微相-岩石相的划分方法.根据不同岩石相的物性、电性及含油性特征,将扇中辫状水道微相细分为辫状水道砂砾岩相、辫状水道粗砂岩相和辫状水道细砂岩相.研究结果表明,沉积微相-岩石相对油水分布具有明显的控制作用,其中以辫状水道砂砾岩相单井日产油能力最高,辫状水道粗砂岩相次之,辫状水道细砂岩相最低,比较符合油田的开发实际.辫状水道粗砂岩相因物性最好,剩余油丰度高,可作为下一步挖潜的主要目标.

A new method for subdividing the sedimentary microfacies of braided river channel in the middle of humid fan

Based on the sedimentary characteristics of a humid fan,this paper presents a new method for subdividing the sedimentary microfacies-lithofacies of the braided river channel in the middle of a humid fan,through a synthetic analysis of single well facies and log facies.According to petrophysical,electrical properties and oil-bearing grade of different types of lithofacies,the braided river channel can be subdivided into three types of macrofacies-lithofacies,namely the braided river channel glutenite facies,braided river channel coarse sandstone facies and braided river channel fine sandstone facies.The further research shows that sedimentary microfacieslithofacies has a significant effect on oil distribution and production in conglomerate reservoirs.This is a good coincidence with the performance of oil production.Through the above analysis,a profitable target can be reached and the distribution of residual oil can be forecasted.This is very meaningful to the further development of the conglomerate reservoir.