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在海相碳酸盐岩沉积理论模式指导下,根据四川盆地晚二叠世沉积相模式及不同沉积相带的区域地质特征,通过古地貌分析和地震相分析,建立起适合四川盆地晚二叠世海相碳酸盐岩沉积相带的地震预测模式,从而预测生物礁有利相带的分布范围。利用地震层序分析方法,根据反射波波组间的相互关系,以区域上能对比的(整合或不整合)地震反射层作为等时面的原则,识别层序界面,划分地震层序,建立地震层序格架。结合地质测井资料以及合成记录,分析控制飞仙关组高能滩相的主要地震层序。以飞四底为准平原化参考面,恢复飞仙关时期不同层序沉积前的古地貌,研究飞仙关时期受古高地控制的台缘带演化、迁移过程,从而预测飞仙关组高能滩相的分布。
Under the guidance of marine carbonate sedimentary model, based on the sedimentary facies model of the Late Permian in Sichuan Basin and the regional geological characteristics of different sedimentary facies, through the analysis of palaeogeomorphology and seismic facies analysis, The prediction model of the seismic facies of the carbonate sedimentary facies in the marine marine facies is to predict the distribution of favorable facies belts in the reef. Seismic sequence analysis method is used to identify the sequence boundaries and establish the sequence of seismic sequences based on the correlation between the reflected wave groups and on the principle of being able to contrast (integrated or unconformity) seismic reflection layer in the area as isochronism surface Seismic sequence framework. Combined with geological logging data and synthetic records, the main seismic sequences that control the high energy facies facies in Feixianguan Formation are analyzed. Based on the reference surface of Feisihejianping plain, the paleogeomorphology before deposition of Feixianguan period was restored, and the evolution and migration process of platform margin controlled by the paleocontinent in Feixianguan period were studied to predict the Feixianguan formation high energy Beach phase distribution.