世界核地质科学2024，Vol.41Issue(6)：1156-1167,12.DOI:10.3969/j.issn.1672-0636.2024.06.008
砂岩型铀矿高精度三维地震勘探砂体识别关键技术研究
Study on key techniques for identifying sand bodies in high-precision 3D seismic exploration of sandstone-type uranium deposit:An example from the HLJ region in Songliao basin
摘要
Abstract
After intensive survey work for sandstone-type uranium deposits,it is necessary to finely characterize target sand body and determine the connectivity of sand body in exploration stage.In this paper,the key techniques were explored and formed for sand body identification based on high-precision 3D seismic data of HLJ region based on the feature of sandstone type uranium deposits of sandstone and mudstone interbedded,poor continuity,and small scale sand body.Firstly,high-resolution processing techniques including prestack noise suppression,combined deconvolution,and prestack time migration were applied to improve signal to noise ratio and resolution of data.Then,sensitive parameters of lithology were determined through rock physics analysis of logging data.Finally,multi-parameter lithology inversion was applied to effectively identify target sand body based on the sensitive lithologic parameters resistivity.The steps of processing and interpretation constitutes the key techniques for sand body identification.The practical application effect proved that established techniques was effective and feasible to identify the thin interbeded sandstone and mudstone in case of the acoustic impedance overlay of sandstone and mudstone,which are quite prospective in future application.关键词
高精度三维地震勘探/砂岩型铀矿/砂体识别/保真保幅高分辨率处理/多参数岩性反演Key words
high-precision 3D seismic exploration/sandstone-type uranium deposit/sand body identification/high-resolution processing with high fidelity and amplitude preservation/multi-parameter lithology inversion分类
天文与地球科学引用本文复制引用
宁媛丽,李金鑫,赵威,王若雯,朱圣伟,杨晓柳..砂岩型铀矿高精度三维地震勘探砂体识别关键技术研究[J].世界核地质科学,2024,41(6):1156-1167,12.基金项目
中国核工业地质局松辽盆地西南部地震地质建模研究项目(编号:202411-5)资助 Supported by Research on seismic-geologic modeling of southwest Songliao basin of China Nuclear Geology(No.202411-5) （编号:202411-5）
