孤岛油田渤21断块馆3~3-4~2沉积单元沉积相分析

以岩心观察及分析资料为基础 ,结合测井、录井和油田动态资料 ,研究了渤 2 1断块馆 33 - 42 沉积单元的沉积相类型 ,亚相、微相划分及其特征 .认为该区馆 33 - 42 沉积单元均属曲流河沉积 ,进一步划分为河床亚相、河床边缘亚相和泛滥平原亚相 .其中河床亚相为本区最有利储油相带 ,河床边缘亚相为较差的储油相带 ,泛滥平原亚相不具储油条件 ,常作为隔、夹层出现 .其次 ,在小层划分、对比的基础上 ,分析了馆 33 - 42沉积单元沉积相的平面展布状况及纵向演化规律 .

Analysis of Sedimentary Facies of Guan 33-42 Sedimentary Units in Block Bo-21, Gudao Oilfield

The types of sedimentary facies, the division and characteristics of subfacies and microfacies of the sedimentary units are studied based on the data of core, the data of well logging and the data of production performance. It is held that Guan 3 3 4 2 sedimentary units are all meandering river deposition, which are also subdivided into three subfacies of channel, channel margin and flood plain. Among the subfacies, the channel deposition is the most favorable reservoir, the channel margin is secondary, and the flood plain mainly acts as interlayers. Meanwhile, the plane distribution and vertical evolution law of the sedimentary facies of Guan 3 3 4 2 sedimentary units are analyzed on the basis of the division and comparison of substrata.