【摘要】 利用地震反射同相轴的外部形态、内部反射特征、同相轴连续性、振幅、频率等参数在博湖坳陷三工河组上段地层内部中识别出杂乱楔状反射、高频强振幅较连续平行席状反射、高频强振幅连续平行席状反射、中频中振幅较连续平行席状反射、低频弱振幅近空白席状反射5种地震相。地震相平面分布具有差异性,结合区域背景,将地震相通过钻井资料转化成相应的6种沉积相。结果表明,焉耆盆地博湖坳陷三工河组上段发育了冲积扇、辫状河三角洲、半深湖—深湖、滨浅湖、洪泛平原、湖底扇6种沉积相,并预测了有利相带。更多还原

【Abstract】 The Upper Sangonghe Formation, Bohu depression, is distinguished through the external form and internal reflection characteristics of seismic-reflection event, the event continuity, and some parameters of amplitude and frequency. There are five distinguished seismic facies: random wedged reflection, high-frequency strong-amplitude near-continue parallel sheet-like reflection, high-frequency strong-amplitude continuous parallel sheetlike reflection, middle-frequency middle-amplitude near-continue parallel sheet-like reflection, and low-frequency weak-amplitude near-blank sheet-like reflection. For these seismic facies, the planar distribution is various. In addition, combing with regional setting, the seismic facies can transform to six sedimentary facies. Results show that six sedimentary facies which are developed at the upper formation include alluvial fans, braided-river delta, semi-lacustrine to lacustrine, shore shallow lacustrine, floor plain, and sublacustrine fan. Moreover, some favorable facies belts are predicted.更多还原