合成地震记录在塔中地区火山岩识别中的应用

Application of synthetic seismogram in identification of volcanic rocks in the center of Tarim area

1. 石油大学,山东东营 257061;2. 中国石化中原油田物探技术研究院,河南濮阳 457000

University of Petroleum, Dongying 257061, China

在分析合成地震记录制作原理的基础上,讨论了多种合成地震记录的制作方法,探讨了声波与电阻率的关系,以及借助于电阻率转声波时差来制作合成地震记录的可行性。首先通过塔中地区10口井法斯特经验常数的统计,得到塔中地区电阻率与声波时差的转换关系式;然后把法斯特经验公式推广到塔中邻区,对塔中地区及其邻区没有声波测井资料的井利用电阻率曲线制作了合成地震记录,同时分析了电阻率转声波时差的精度和影响因素;最后对火山岩顶底进行了标定和追踪,作出了塔中地区二叠系火山岩分布图,并对下二叠统火山岩分布规律及其控制因素进行了分析。

Based on an analysis of the principles of makingsynthetic seismogram, We discusse methods of mak-ing synthetic seismogram, the relationship betweenresistivity and acoustic wave, and the possibility of making synthetic seismogram by resistivity. Firstly,the relation between resistivity and acoustic wave isderived from 10 wells in the center of Tarim area.Secondly, the relation is applied to the neighborhoodand synthetic seismograms are made. Finally the topand bottom of the volcanic rock beds are scaled andtraced. The distribution graph of the Permian vol-canic rocks is drawn, and the controlling factors ofthe lower Permian are inferred.