黄土塬区煤炭勘查工作中二维地震勘探工作方法
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摘要
在宁夏中南部黄土塬地区的煤炭勘查工作中,先期的二维地震勘探成果对地质勘探工程布设至关重要.由于黄土高原以强烈剥蚀形成的黄土塬、梁、峁、深切沟谷等,地形条件差,导致二维地震测线的布设不能按正规网度进行,通过研究黄土物理特性和激发因素与表层黄土结构之间的关系,优选激发井位和井深,同时采用小道距、小线距、高密度空间采样技术,获得高信噪比、高分辩率地震资料,经试验沿湾沟布设地震测线,数据处理后能基本反映出地下各地质体形态、埋深等信息,为后期地质勘探工作顺利开展提供了保证.
To carry out coal survey work in loess tableland area of central and southern Ningxia,the early 2D seismic exploration results are very important to arrange geological exploration engineering.Because of the poor topographic conditions,such as strong erosion,loess tableland,ridge,loess hilly and deep gully in the Loess Plateau,there can not arrange a regular network of 2D seismic survey lines.By study physical characteristics of loess and relationship between exciting factors and surface loess structure,the best well location and well depth are selected,and meanwhile,using small group interval,small line space and high density sampling technique to obtained high SNR(signal-to-noise ratio) and high resolution seismic data.The test proved that,if seismic lines are arranged along the gully,data after treatment can basically reflect morphology,depth and other information of underground geological body.These information provided guarantee for geological exploration work in the latter.
To carry out coal survey work in loess tableland area of central and southern Ningxia,the early 2D seismic exploration results are very important to arrange geological exploration engineering.Because of the poor topographic conditions,such as strong erosion,loess tableland,ridge,loess hilly and deep gully in the Loess Plateau,there can not arrange a regular network of 2D seismic survey lines.By study physical characteristics of loess and relationship between exciting factors and surface loess structure,the best well location and well depth are selected,and meanwhile,using small group interval,small line space and high density sampling technique to obtained high SNR(signal-to-noise ratio) and high resolution seismic data.The test proved that,if seismic lines are arranged along the gully,data after treatment can basically reflect morphology,depth and other information of underground geological body.These information provided guarantee for geological exploration work in the latter.
引文
[1]刘玉强,张延庆.固体矿产地质勘查、资源储量报告编制文件及规范解读[M].北京:地质出版社,2007:1-20.
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[4]孙景旺,杜中东,任文军,等.鄂尔多斯盆地黄土塬区多线地震采集技术[J].石油地球物理勘探,2003,38(4):505-507.
[5]梁顺军,肖敏,唐怡,等.二维地震过障碍观测系统模式及其参数设计[J].石油地球物理勘探,2006,41(1):1-7.
[6]雍世和,张超谟.测井数据处理与综合解译[M].东营:中国石油大学出版社,2002:6-139.
[2]张胜业,潘玉玲.应用地球物理学原理[M].武汉:中国地质大学出版社,2004:116-158.
[3]李舟波,孟令顺,梅忠武,等.资源综合地球物理勘查[M].北京:地质出版社,2004:158-166.
[4]孙景旺,杜中东,任文军,等.鄂尔多斯盆地黄土塬区多线地震采集技术[J].石油地球物理勘探,2003,38(4):505-507.
[5]梁顺军,肖敏,唐怡,等.二维地震过障碍观测系统模式及其参数设计[J].石油地球物理勘探,2006,41(1):1-7.
[6]雍世和,张超谟.测井数据处理与综合解译[M].东营:中国石油大学出版社,2002:6-139.
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