摘要
四川盆地东北部地区的生物礁、潮道及河流和岩溶相等特殊地质体皆是含油气的有利区域,如何识别出这些特殊地质体成为能够找到油气资源的一种有力手段。采用钻井资料中所包含的沉积学信息可以进行非常详细的沉积研究,只是这种点上的沉积相研究成果还不能满足面(区域)上研究的需要;利用该区现有的三维地震资料,进行地震相波形分类,就能得到特殊地质体在平面上的展布,并结合钻井资料,得出地震相划分的合理性。钻井资料和地震相波形分类的结果吻合很好,表明地震相波形分类技术能够对生物礁、潮道及河流和岩溶等进行有效的识别,但该方法也受到众多因素的制约,需要把沉积和断层区分开,往往在沉积较简单的地区地震相波形分类能取得较好的效果,而断层的发育会破坏地震相波形分类的基础(地层沉积的原生信息),使地震相波形分类的解释变得异常复杂。
The special geologic bodies of reefs,tidal channels and rivers are the favorable hydrocarbon bearing reservoir in northeastern Sichuan basin.Since the analysis of the existing drilling data fails to meet the requirements for study of these geologic bodies,the author proposes to determine the areal distribution of these geologies bodies by 3-D seismic facies waveform classification,and further delineate seismic facies under the constraints of drilling data.Although waveform classification can easily distinguish reefs,tidal channels,and rivers,it is affected by many factors.Desired results could easily be reached in areas of simple sediment.The existence of faults undermines the base of seismic facies waveform classification(original sedimentary information) and makes interpretation of waveform classification difficult.
出处
《勘探地球物理进展》
2010年第1期52-57,共6页
Progress in Exploration Geophysics
关键词
地震相
波形分类技术
特殊地质体
川东北地区
钻井资料
seismic facies
waveform classification
special geologic body
northeastern Sichuan
drilling data
