湘鄂西地区地震采集干扰波压制方法研究
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摘要
湘鄂西地区地震地质条件复杂多变,地形切割剧烈、地表岩性变化较大,激发和接收条件差;断裂发育,构造变形强烈,构造接触带反射波组特征不明显,基本为杂乱反射。经过分析研究表明,制约湘鄂西地区资料品质的关键因素在于地震干扰。在研究分析湘鄂西地区的生产资料和试验资料的基础上,结合野外实践和理论基础,重点针对湘鄂西地区次生干扰的特点进行检波器压制干扰的方法分析,研究不同组内距、检波器数量、组合基距、组内高差、检波器组合形式下次生干扰的压制效果,以改善湘鄂西地区地震资料信噪比。
Hunan-Hubei west region is characterized by complex and changeable seismic geological conditions,violently dissected topography,great ground lithological changes,poor shooting and receiving conditions,well-developed fracture,intense tectonic deformation and unapparent reflective waves feature.The research shows that the key factor hindering data quality in the region is seismic noise.On the basis of analysis of the data of test and production in the region,this paper studies the method to suppress secondary disturbing wave with the help of geophone and its suppressing result under different forms of element interval,geophone numbers,base group length,elevation difference in an array and geophone pattern,with the purpose of improving SNR of seismic data in the region.
Hunan-Hubei west region is characterized by complex and changeable seismic geological conditions,violently dissected topography,great ground lithological changes,poor shooting and receiving conditions,well-developed fracture,intense tectonic deformation and unapparent reflective waves feature.The research shows that the key factor hindering data quality in the region is seismic noise.On the basis of analysis of the data of test and production in the region,this paper studies the method to suppress secondary disturbing wave with the help of geophone and its suppressing result under different forms of element interval,geophone numbers,base group length,elevation difference in an array and geophone pattern,with the purpose of improving SNR of seismic data in the region.
引文
[1]李庆忠.论地震次生干扰[J].石油地球物理勘探,1983,18(4):295-314.
[2]陆基孟.地震勘探原理[M].北京:石油工业出版社,1990:130-161.
[3]魏继东,丁伟.检波器野外组合因素对地震资料品质影响分析[J].石油物探,2010,49(3):312-318.
[4]朱鹏宇,杨晗,杨海涛,刘泽源,罗钦.宽线观测大组合接收技术在阜康断裂带的应用[J].勘探地球物理进展,2010,33(5):359-362.
[2]陆基孟.地震勘探原理[M].北京:石油工业出版社,1990:130-161.
[3]魏继东,丁伟.检波器野外组合因素对地震资料品质影响分析[J].石油物探,2010,49(3):312-318.
[4]朱鹏宇,杨晗,杨海涛,刘泽源,罗钦.宽线观测大组合接收技术在阜康断裂带的应用[J].勘探地球物理进展,2010,33(5):359-362.
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