地震相是沉积相在地震剖面上表现的总和，是由沉积环境（如海相或陆相）所形成的地震特征，是指一定面积内的地震反射单元，该单元内的地震属性参数与相邻的单元不同。它代表产生其反射的沉积物的岩性组合、层理和沉积特征。
As to fan-delta and braided river-delta the formers emphasize on dissecting sandstoneunderground and observing outcrop profile and have studied systematically sedimentarycharacteristic of fan-delta and braided river-delta according to lithofacies, well-logging faciesand seismic facies.
前人对扇三角洲和辫状河三角洲的研究注重井下砂体解剖和露头剖面的观察，并且从岩相、测井相和地震相入手，系统地研究了扇三角洲和辫状河三角洲沉积特征。
参考来源 - 松辽盆地十屋断陷沙河子—营城组扇三角洲和辫状河三角洲发育的控制因素研究It is better to predict reservoir sand body distribution in three-dimensional space and greatly reduce uncertainty caused by single attribute seismic facies analysis. This technology is used in Wanzhuang area,Huabei Oilfield.
结合钻井资料,借助三维可视化技术在三维空间中预测储层砂体的空间分布,大大减少了地震相划分的多解性,提高了储层预测的精度和工作效率。
参考来源 - 利用多属性体分类技术预测扇三角洲砂体·2,447,543篇论文数据，部分数据来源于NoteExpress
研究地震相的目的在于重塑盆地的沉积史和构造史。
The purpose of studying seismic facies lies on reconstruct the sedimentary history and structural history of basin.
这些地震相有规律地分布在拗陷的一定部位和地震层序中。
These seismic facies follow a definite pattern of distribution in certain sections and seismic sequences.
地震相分析是指根据地震属性对地震相单元进行识别和作图。
The analysis of seismic facies means identification and mapping for seismic facies unit on the basis of seismic attributes.
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