甘肃省陇东地区黄土塬地区煤田地震勘探技术方法探索

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英文篇名：Probe into Coalfield Seismic Prospecting Technological Method in Loess Tableland, Eastern Gansu 中文刊名：中国煤炭地质 英文刊名：Coal Geology of China 作者：王永奎 ; 殷全增 英文作者：Wang Yongkui1 ; Yin Zengquan2(1.The Integrated Reconnaissance Team ; Gansu Bureau of Coal Geological Exploration ; Tianshui ; Gansu 741002 ; 2.Geophysical Prospecting and Surveying Team ; Hebei Bureau of Coal Geological Exploration ; Xingtai ; Hebei 054000) 中文关键词：黄土塬 ; 静校正 ; 地表一致性反褶积 ; 浮动基准面静校正 ; 甘肃陇东 英文关键词：loess tableland ; statics ; surface-consistent deconvolution ; floating datum statics ; eastern Gansu Province 出版日期：2010-08-25 机构：甘肃煤田地质局综合普查队;河北省煤田地质局物测地质队; 年：2010 期：08 出版单位：中国煤炭地质

摘要

甘肃陇东地区是典型的巨厚黄土覆盖区,黄土层厚度高达200多米,多次波发育,地震反射波能量极弱,信噪比低,处理中静校正问题较为突出。为保证目的层反射波的能量和高频信号,采用了多井大药量组合激发方式及5个60Hz检波器串接组合接收方式,排列采用大偏移距,以克服近道面波及声波的干扰。资料静校正选用浮动基准面静校正及初至折射静校正,选用了多道统计的地表一致性反褶积,以保证空间上各地震反射道之间的均一性。通过上述技术措施,取得了比较理想的地质效果,基本解决了巨厚黄土覆盖区有效波能量不足及资料处理中的难题。
The eastern Gansu area is typical extremely thick(more than 200m) loess covered tableland,where multiple wave is developed,reflection energy weak,signal-noise ratio low,thus the statics issue in processing is protruded.To ensure target reflection energy and high-frequency signal,multi-hole large explosive charge shot array and five 60Hz geophones serially assembled receiving pattern are adopted.The spread geometry uses large offset to overcome interferences from near channels surface wave and acoustic wave.The floating datum statics,preliminary refraction statics and surface-consistent deconvolution of multiple channel statistics are selected and used to ensure spatial seismic reflection channels homogeneity.Through above technical measures,rather perfect geological effects are obtained,thus the hard nuts of effective wave energy insufficient and data processing in extremely thick loess covered areas are basically solved.

引文

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