川中地区长兴组生物礁地震沉积学研究

地震沉积学是用地震方法研究沉积岩及其形成过程的学科，是继地震地层学、层序地层学之后的新兴边缘学科。利用分频解释、相位调整和地层切片等关键技术对四川盆地长兴组生物礁进行了地震沉积学研究。结果表明：利用分频技术能够建立研究区精细等时地层构架；经过相位调整后的地震数据使地震道近似于波阻抗剖面，可提高剖面的可解释性；地层切片技术与地震属性分析技术相结合比常规振幅和相位切片在描述生物礁的横向变化和展现不同的沉积特征方面更加有效。实例分析表明，地震沉积学在沉积相分析和生物礁预测方面具有独特的优势。

Seismic Sedimentology of Organic Reef from the Changxing Formation of Central Sichuan

Seismic sedimentology is a subject using seismic method to make researches on sedimentary rocks and their formation processes.It is a new marginal intersection subject following the seismic stratigraphy and sequence stratigraphy.Using the technologies of frequency division,phase shift and stratal slicing,this paper studies seismic sedimentology of the organic reef from the Changxing Formation of Sichuan basin.The results show that using the frequency division technology can create fine isochronous stratigraphic framework;phase shift seismic data are similar to wave impedance data and prone to interpretative;the combination of stratal slicing and seismic attributes analysis is more effective than the conventional amplitude slices on capturing the tiny lateral changes and displaying the various depositional characteristics.Examples showed that seismic sedimentology has unique advantages in the analysis of sedimentary facies and the forecast of organic reef.