1　前言　　阿尔巴 (Ａｌｂａ)油田位于北海中部 (英国区块1 6/2 6) ,目的层在海底下平均深度 1 90 0ｍ ,由始新统高孔隙、未固结的浊流河道砂组成 ,并被低渗透的页岩封盖。主要河道大约长 9ｋｍ ,宽 1 .5ｋｍ ,厚 1 0 0ｍ(图 1 )。该河道包含了储层内不连片的页岩 ,这种页岩会 1 INTRODUCTION The Alba oilfield is located in the central North Sea (UK block 16/2 6) with an average depth of 1 90 0 m beneath the seafloor. The Alba oilfield is composed of high Pores of the Eocene and unconsolidated turbid channel sand, It is covered with low permeability shale. The main river is about 9km long, 1.5km wide and 100m thick (Figure 1). The channel contains uncontained shales in the reservoir, which shale would have