【摘要】 分频处理技术将解释后的时间域地震数据转换成频率域,使目标地质体形成一个新的频率域数据体,提取该数据体各个不同频率段的频率切片,分析切片振幅高低所代表的地质意义,将频率切片赋予了沉积的概念并刻画沉积体边界。基于分频处理技术原理,以南图尔盖盆地多尚地区阿克沙布拉克组为例,刻画河道沉积体平面几何形态。研究表明,不同频率段地震数据反映不同级别的地质信息,该地区频率为30~35Hz时对河道砂体最敏感,经优选之后叠合的频率振幅切片可以有效地描述河道沉积体的边界、平面展布及不连续性等特征。更多还原

【Abstract】 Using frequency division interpretation technique convert interpretation of seismic data in time domain to the frequency domain.Extracting a frequency slice of the new data frequency volume of the different frequency bands.Analysising of geological significance slice represents the amplitude level.Connecting the slice and the depositional environment and characterizing the deposition boundary.Based on frequency division interpretation technique,this paper characterizes the Akshabulak formation sedimentary system in block doshan area of South Turgai Basin,Kazakstan.The results show that different frequency seismic data reflect different levels of geological information,the frequency decomposing strata slice(30— 35Hz) displays channel sand bodies clearly.Another finding is that by using superimposed frequency slice can characterize channel boundary,plane geometry and discontinuity accurately.更多还原