【摘要】 鄂尔多斯盆地上古生界河道砂体纵向相互叠置,横向变化快,非均质性强,属于典型的低孔低渗岩性油气藏,河道砂体的预测难度大。为解决这一问题,探索、试验和应用了多种先进适用的技术方法,包括古地貌分析、地震振幅属性分析、频谱分解、地震相分类和吸收系数等现有叠后分析技术,在鄂尔多斯盆地内不同研究区块开展了针对岩性油气藏的河道地震技术应用研究,精细刻画了河道沉积的特征。应用实践表明,结合鄂尔多斯盆地内不同研究区块的地质特点,选择和利用上述地震技术能够有效识别盆地内上古生界岩性油气藏的河道砂体,效果较好。同时还形成了一套适合鄂尔多斯盆地的河道识别技术系列,为鄂尔多斯盆地陆相河道研究提供了借鉴。更多还原

【Abstract】 It is very hard to identify the channel sand body of Upper Paleozoic in Ordos Basin,because of its vertical overlying,dramatic lateral,and strong heterogeneity. It is typical lithologic reservoir of low porosity and low permeability. To solve the problem,multiple advanced techniques were explored,tested and applied,such as Paleogeomorphology analysis,seismic amplitude analysis,spectral decomposition,seismic facies classification,absorption coefficient and other techniques for post-stack analysis. Application research on channel seismic techniques for lithologic reservoirs in different areas of Ordos Basin was carried out,and channel sedimentary features were described subtly. Application showed that these seismic techniques could effectively identify channel sands of Upper Paleozoic in Ordos Basin,combined with the geological characteristics of different study areas in the Basin. Meanwhile,systematic channel identification techniques applicable for Ordos Basin were developed,providing a reference for continental facies channel research in Ordos Basin.更多还原