【摘要】 从岩相、测井相和地震相三方面入手,将扇(辫状河)三角洲沉积相划分为扇(辫状河)三角洲平原亚相、扇(辫状河)三角洲前缘亚相和前扇(辫状河)三角洲亚相,并识别出辫状河道微相、辫状分流河道微相、水下水道微相、前缘砂微相、边缘席状砂微相、开阔湖沉积微相和水下重力流沉积微相。更多还原

【Abstract】 In the Shiwu Fault Depression lake basin of southern Songliao Basin,fan delta depositional system develops in the west side of the steep slopes,with high sediment thickness and fast phase-change,coarse andmiscellaneous lithology,braided river delta develops in the eastern side of the gentle slopes,sandbody distributes relatively large ranges,but the thickness of sedimentary is thin.After the rapid entry into the water it becomes open lake deposits.Fan(braided river) deltas is divided into braided fan(braided river) delta plain sub-facies,fan(braided river)delta plain front subfacies and the front fan(braided river) delta subfacies according to the lithofacies and well logging seismic facies of a three-pronged.And the identification method of micro-braided river facies,braided distributary channel microfacies,water sewer microfacies,frontal sand microfacies,edge sheeted-sand microfacies,open lake sedimentary microfacies and underwater gravity flow sedimentary microfacies is introduced.更多还原