CAJ | 학술논문

目前对文南油田文79断块沙二下亚段油藏的沉积微相研究还存在一些争议，重新认识研究区沉积微相，对后期开展精细油藏描述，指导剩余油的挖潜，具有重要的现实意义。对研究区岩石学特征、沉积构造特征、粒度特征、测井资料等进行综合分析和沉积微相建模，认为文79断块沙二下亚段发育一套干旱、半干旱环境下的分支河沉积体系，识别出河道充填沉积、近漫溢、远漫溢和河漫湖泊等沉积微相类型。
목전대문남유전문79단괴사이하아단유장적침적미상연구환존재일사쟁의，중신인식연구구침적미상，대후기개전정세유장묘술，지도잉여유적알잠，구유중요적현실의의。대연구구암석학특정、침적구조특정、립도특정、측정자료등진행종합분석화침적미상건모，인위문79단괴사이하아단발육일투간한、반간한배경하적분지하침적체계，식별출하도충전침적、근만일、원만일화하만호박등침적미상류형。
Sedimentary microfacies in the lower 2nd member of Shahejie Formation reservoir in the Wen 79 block have been inves-tigated for many years,at present there are still some unsolved controversies.Microfacies analyses in studied area have an impor-tant practical significance in finely describing reservoir and exploiting the remaining oil.Based on comprehensive analyses of pet-rological characteristics,sedimentary structure,grain size characteristics,logging data and sedimentary microfacies modeling,we think the lower 2nd member of Shahejie Formation in the Wen 79 block was deposited in Distributive Fluvial Systems in arid and semiarid climate.River sedimentary filling,nearly overflowing,far overflowing and alluvial lake microfacies have been recog-nized.