层序地层格架下的地震相分析技术及其应用

近年来，层序地层学的理论和方法在沉积环境分析和储层预测中得到越来越广泛的应用，而且随着大面积高分辨率地震资料的不断增多，地震地层学和层序地层学的结合也越来越紧密。按照层序地层学的理论，对地震资料进行重新处理，探讨出一种有效合理的层序地层格架的建立方法，并在此格架下，进行多属性地震相体分析，从横向和纵向上同时进行划相，得到地震相体，利用地震相体进行地震层序的识别和解释，从而进行沉积环境的细致分析和储层预测。西南四川盆地的暗礁和浅层储藏特性描述中，此方法在划分地震层序和沉积层序方面，比以往的结果要精细和更加定量化。利用地震资料所做的地震层序和地震相分析具有较明确的地质含义，一般可以直接转换成沉积层序和沉积相。

SEISMIC FACIES ANALYSIS BASED ON SEQUENCE STRATIGRAPHIC FRAMEWORK AND ITS APPLICATIONS

In recent years,with continuous increase of high resolution seismic data,seismic stratigraphy has been more and more closely connected with high-resolution sequence stratigraphy.According to the theory of sequence stratigraphy,the seismic data should firstly be reprocessed and reconstructed to build the isochronous stratigraphy framework in this kind of application.After building this isochronous seismic volume,all seismic sequence identification,seismic facies analysis and reservoir characterization should be carried out under this isochronous stratigraphic framework.The results of the study have proved that the approaches are valid and can achieve ideal results.