安五地区长6油层组沉积物源及沉积微相研究

鄂尔多斯盆地安五地区长6油层组重矿物组合类型的分布及其变化具有分带性，由北东向南西方向依次分布次稳定重矿物带、次稳定重矿物 稳定矿物带和稳定矿物带。石英阴极发光特征表明物源母岩为中一低级变质岩系，说明研究区长6油层组沉积物源主要来自北东部吕粱山区和大青山区。研究区长。油层组以三角洲相沉积为主，三角洲前缘亚相发育．微相类型有水下分流河道、河口坝、远砂坝、水下天然堤、水下分流河道间5个微相，局部发育滨浅湖亚相。

Sedimentary Source and Microfacies of Reservoir Chang 6 in Anwu Area

The distribution of heavy mineral assemblage type and its changes are zonation in Reservoir Group Chang 6 in Anwu Area of Ordos Basin. The pattern of hypo-stable heavy mineral zone, hypo-stable heavy mineral +stable mineral zone and stable mineral zone are distributed from north-east to south-west, quartz cathode luminescence characteristics indicate that the source mother rock is a middle-low class metamorphic rock, which shows that the sedimentary sources of the Reservoir Group Chang 6 in the studied area are mainly from Luliang and Daqing mountain areas in the north-east. In the studied area, the Reservoir Group Chang 6 is mainly composed of delta deposits, where delta front subfacies distributes widely, five microfacies, such as subsea distributary channel, mouth bar, distal sandbar, subsea natural levee and subsea interdistributary bar are developed, where coastal shallow lake subfacies is grown partially.