关键词: 鸟足状三角洲, 水下分流河道, 指状砂坝, 河口砂坝, 沉积模式

Abstract:

Sedimentary facies of the Chang 8 reservoirs，Xifeng Oilfield is interpreted jointly with sedimentary structure，characters of sedimentary sequence and logging

data.The main sedimentary microfacies of Chang 8 reservoirs include distributary channel，channel mouth bar and front sand sheet.The fingerbar sandbody is made up of

distributary channel and channel mouth bar.The features of sedimentary microfacies are influenced by many factors including climate and terrain and so on.The fingerbar

sandbody is the peculiar sandbody morphology in the study area.The fingerbar sandbody，distributary channel sandbody and distributary mouthbar sandbody constitute the

main reservoirs in the area.The study result provides the foundation for prediction of favorable reservoir facies belts and next exploration.

Key words: birdfoot delta, distributary channel, fingerbar, channel mouth bar, sedimentary model