青海油砂山分流河道砂体储层骨架模型

Establishmemt of the Reservoir Frame Models for Distributary Channel Sandbodies on Delta Plain in Youshashan Oilfield, Qinghai Province

青海油砂山油田上新统下油砂山组（Ｎ^（２））Ｋ２至Ｋ１－３（地下）标准层之间的分流河道砂体具有规模小、厚度薄、侧向连通性差的特点，构成了迷宫式的储层骨架。从油田的地面露头研究入手，探索了一条利用露头资料建立砂体骨架原型模型，进而建立地下油田地质模型的思路和方法．露头调查获取的分流河道砂体宽厚比，以及从露头砂体骨架原型模型中提取的总砂体面积比和不同厚度砂体的面积比等参数可作为建立地下油田砂体骨架预测模型的最主要的定量依据。根据这些参数，预测了青海油砂山油田地下砂体骨架横剖面的井间遗漏砂体的面积及不同厚度分流河道砂体的数量．

Distributary channel sandbodies are frame reservoir in delta plain. ThePliocene sandbodies at Youshashan oilfield of Qinghai province constitute the labyrinthreservoir frame. They are small, thin in size and bad in lateral continuity. It is introducedthe method and procedure establishing the geologic models with surface analogue (outcropof subsurface studying interval in Youshasha oilfield). First the prototype frame model isbuilt using the useful information extracted from outcrop investigation, then theparameters including ratio of width and thickness of the distributary channel sandbodies,ratio of sandbody and section area and percentage of different thickness sandbodies areacan be gotten from the prototype model. Moreover, the parameters may be used to buildthe sandbodies frame forecasting model for the underground oilfield.