均方根振幅与岩性

Mean-Square-Root amplitude and lithology

针对T区块的二维地震资料,研究目的层的岩性分布,减少勘探风险,本文利用均方根振幅对工区内不同层段的岩性特征及分布做了探索性研究。在详细分析该区上白垩统和下第三系的地震层序基础上,又划分出九个亚层序,并在众多的地震属性分析基础上,找出最能反映该区岩性的属性为均方根振幅,然后提取主要目的层的均方根振幅,并以此为据定性地分析了工区有利勘探区带的分布,并对以往利用均方根振幅进行沉积相和岩性研究的方法提出了自己的看法。

In accordance with the lithologic distribution of studied targets in 2-D seismic data of T block and in order to reduce exploration risk, using mean-square-root amplitude to carry out probing study on the lithologic feature and distribution in different intervals of the work area. Based on detailed analyzing the Upper Cretaceous and Palaeogene seismic horizon sequences.the paper divided 9 sub-horizon sequences again and found that mean-square-root amplitude is the attribute being most capable to reflect the lithology in the region on the basis of analyzing multiple seismic attributes; then, detected the mean-square-root amplitude of major targets and took this as a basis to qualitatively analyze the distribution of exploration zone of interest in the work area and presented our views on the former approaches using mean-square-root amplitude to carry out study of sedimentary phase and lithology.