摘要
地震相是特定沉积相或地质体在地震剖面图上所反映的主要特征的总和,是沉积和地震之间联系的枢纽。利用不同相带的井在地震剖面上的标定结果和声波时差统计,在常规地震剖面和瞬时相位剖面初步得到相带划分图。根据地震反射层的外形结构、频率、振幅及连续性等特征,建立三种沉积相对应的地震相模式,分析沿目标地层顶界地震属性切片,筛选对相带边界表征清晰的属性,确定出地震相的分布区域,这对以后的储层预测和生物礁的发现提供技术支持。
Seismic facies have the main features of specific sedimentary facies or geologic bodies that reflect from the seismic section,which is the link between sediment and seism.Making use of seismic calibrating result and acoustic travel time statistics of the well in different facies belt,we could preliminarily get the distribution map of seismic facies from the regular seismic section and instantaneous phase section.According to the features like the outside structure of seismic reflection layer,frequency,amplitude and consistence,we could establish three sedimentary facies that are corresponding to the seismic facies models.On the basis of this,we analyze the slice of seismic attribution from the top boundary of target layer,single out the seismic attribution which can distinguish the facies belt and finally determine the distribution area of seismic facies,all of which will provide a technical support for reservoir prediction and reef discovery in the future.
出处
《工程地球物理学报》
2010年第6期732-735,共4页
Chinese Journal of Engineering Geophysics
关键词
地震相
声波时差
地震属性
瞬时相位
seismic facies
acoustic travel time
seismic attribution
instantaneous phase
