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重点阐述了基于地震属性的地震相分析方法。了解区域地质概况、沉积背景,选取完整的沉积体系;选取合适的时窗沿层提取地震属性(RMS,平均瞬时频率、有效带宽),利用RMS属性识别沉积体,平均瞬时频率判断物源方向,有效带宽推测沉积环境及地层的均质性;综合考虑最终确定沉积体的地震相特征,绘制该层段的地震相平面图;最后将地震相转相为沉积相。利用该方法对尼日尔三角洲S工区进行地震相分析,识别出高弯度水道、水道-朵叶复合体、末端朵叶等沉积体的典型地震相特征,取得很好的效果,显示该方法具有良好的应用前景。
The seismic phase analysis method based on seismic attributes is emphatically described. (RMS, average instantaneous frequency and effective bandwidth) are extracted along the layer of time window, the RMS is used to identify the sedimentary body, the average instantaneous frequency is used to judge the direction of the provenance, and effective The bandwidth is used to infer the depositional environment and stratigraphic homogeneity. The seismic facies feature of the sedimentary body is finally determined, and the seismic facies plan of the layer is drawn. Finally, the seismic facies phase is the sedimentary facies. Using this method, the seismic facies analysis of S zone in the Niger Delta is carried out to identify the typical seismic facies characteristics of the sediments, such as high-caver waterway, water-dune complex and terminal blossoms. The results show that this method has a good Application prospects.