【摘要】 系统总结了各类河流相的沉积特征和识别标志,结合鄂尔多斯盆地靖北早二叠世的具体地质条件,详细分析了该区沉积物特征,首次提出该区早二叠世为网状河-浅水三角洲相沉积的新观点,并建立了该类三角洲相的沉积模式,进而概括其沉积特点与经典三角洲沉积特征的区别,特别指出三角洲平原相带是该类三角洲的骨架砂体,突破了“经典”三角洲的思维定式,丰富了三角洲沉积理论,为此类三角洲储集层的进一步预测和油气勘探提供了新的思路。更多还原

【Abstract】 Sedimentary characteristics of all kinds of fluvial facies are summarized systematically.Combined with practical geology conditions of Early Permian in Jingbei area of Ordos basin and systematic analysis results of deposi-tional characteristics,a new viewpoint is proposed that the depositional system of Early Permian in the area belongs to braided river-shallow water delta deposits,and the sedimentary facies model is built.The difference of depositional characteristics is summarized,and compared with the typical deltaic sedimentary characteristics.It is pointed out that deltaic plain facies is deltaic matrix sand body,which breaks away the traditional thought of the typical delta,and en-riched the theories of delta deposition.Provides a new thought for further reservoir prediction and oil and gas explo-ration.更多还原