砂岩型铀矿地震综合预测技术研究——以齐哈日格图凹陷铀矿为例  

Integrated seismic prediction techniques research on sandstone-type uranium deposit: a case study of uranium deposit in Qiharigetu depression

作　　者：吴曲波[1,2] 黄伟传 乔宝平 WU Qu-bo;HUANG Wei-chuan;QIAO Bao-ping(Beijing Research Institute of Uranium Geology,Belting 100029,China;CNNC Key Laboratory of Uranium Exploration and Evaluation Technology,Beijing 100029,China)

机构地区：[1]核工业北京地质研究院,北京100029 [2]中核集团铀资源勘查与评价技术重点实验室,北京100029

出　　处：《地球物理学进展》2018年第5期2002-2014,共13页Progress in Geophysics

基　　金：中核集团"龙灿"示范工程科研项目(第二阶段)(中核科发[2018]111号)资助

摘　　要：砂岩型铀成矿与特定的区域地质、地球物理、地球化学环境密切相关,其成矿过程是漫长且复杂的地质演化过程,受多方因素综合控制,砂岩型铀矿勘查预测工作也是一项复杂且系统的工作.砂岩型铀矿勘查中,以往多使用钻探方法进行综合评价、预测,然而钻探方法成本较高,且周期较长.目前多采用电磁法、重磁法、放射性测量等物探技术对砂岩铀成矿环境进行探测达到间接评价和预测砂岩型铀矿的目的,取得了一定效果,但方法精度仍需进一步提高.本文以乌兰察布坳陷的齐哈日格图凹陷砂岩型铀矿为例,从砂岩型铀成矿控制因素出发,利用三维地震构造精细解释技术、拟声波地震反演砂体识别技术、三维地震属性特征分析技术等综合研究砂岩型铀矿成矿地质环境,包括:地层断裂分布、岩性结构、砂体孔隙属性、沉积相带分布等,并预测了研究区砂岩铀成矿有利区段,与实际钻孔资料有较好的吻合.据此提供一种新的砂岩型铀矿成矿预测的思路和方法,具有较好的应用前景.Sandstone-type uranium mineralization is closely related to specific regional geological, geophysical and geochemical environments. The metallogenic process is a long and complex geological evolution process,which is controlled by multiple factors.The exploration and prediction of sandstone-type uranium deposits is also a complicated and systematic work. In the exploration of sandstone-type uranium deposits,drilling methods were often used for comprehensive evaluation and prediction in the past. However,the cost of drilling methods is high and the period is longer. At present, many geophysical exploration techniques, such as electromagnetic method, gravity and magnetic method and radioactivity measurement, are used to detect the uranium metallogenic environment of sandstone. The purpose of indirect evaluation and prediction of sandstone-type uranium deposit is achieved,but the precision of the method still needs to be further improved. This paper took the Qiharigetu depression sandstone type uranium deposit as an example in Wulanchabu depression,started from the sandstone type uranium mineralization controlling factors,used 3 d seismic structure interpretation technology,pseudo-acoustic seismic inversion sand body identification technology and 3 d seismic attribute analysis technology to study comprehensively the sandstone type uranium mineralization geological environment, includes：formation fracture distribution,lithology structure,pore properties,sedimentary facies belt distribution of sand body,and predicted the advantageous area sandstone uranium mineralization in the study area,which have good match with actual drilling data,thus it provided a new train of thought and method for prediction of sandstone type uranium mineralization, and it will have good application prospect.

关 键 词：砂岩型铀矿 三维地震勘探 成矿环境预测 齐哈日格图凹陷 

分 类 号：P631[天文地球—地质矿产勘探]