When the hydrate saturation is less than the critical saturation : a ) the avo curve can indicate whether there exists any free gas below the bsr ; b ) if there is no free gas below , only when the micro model is model c can bsr be visible in seismogram 当水合物饱和度小于临界饱和度时： a ) avo曲线能够反映bsr下方是否含有游离气； b )如果下方没有游离气，只有微观模型为模型c时，在地震记录上才有可见的bsr 。
Basing on the analysis and correlation of the7 wells , 8 seismic sequence boundaries are obtained by logging - seismic correlation , based on seismogram synthesis . more over , they can be traced in the studying region . the synchronic sequence stratigraphic framework is established finally 在单井分析和连井对比的基础上，通过合成记录标定、地震层序的分析，识别出8个三级层序界面，而且完成了全区的主干剖面解释，建立了井震统一的等时层序地层格架。
