利用地震相分析方法圈定煤层变焦区

Delineated the coking district of coal-seam by seismic faces analysis

三维地震数据体中,地震波形的总体变化源于地质体构造、岩性的综合反映,因此地震波形的总体变化是一个很重要的地震属性。然而,传统的岩性解释手段(例如波阻抗反演和地震属性技术等)忽略了地震波形的整体变化及其分布规律。利用地震波形的变化来建立地震相,在一定程度上能够弥补这一缺陷。利用地震波形划分地震相就是通过神经网络分析将地震信号按照波形进行分类,不同的类反映不同的岩性地质体。基于波形划分地震相原理,介绍了利用Stratimagic地震地层解释系统进行地震相划分的一般流程和关键参数的设置,并以淄博矿业集团葛亭煤矿某采区为例,对其3煤层变焦区进行了圈定。

In 3D seismic data,the overall changes in seismic wave is a comprehensive reflection of the underground geological structure and lithology.However,the problem is that the overall variation and distribution of seismic signal are always missed by the traditional means（for example,impedance inversion and seismic attributes,etc.）.To a certain extent,establishment of seismic faces using waveform can make up for this deficiency.The seismic faces analysis,based on waveform,through neural network analysis wave signals in accordance with the classification and different classes reflect different geological lithology.Based on the waveform classification principles,a routine workflow and settings of key parameters in seismic face classification have been discussed by utilizing the Stratimagic Interpretation System.In practice,the coked zone of Coal 3 has been delineated at Getting Coal Mine.