高原地区复杂山地地震资料处理

英文篇名：High Altitude Complex Mountainous Area Seismic Data Processing
中文刊名：中国煤炭地质
英文刊名：Coal Geology of China
作者：姚磊 ; 方庆水
英文作者：Yao Lei ; Fang Qingshui(Geophysical Prospecting and Surveying Team ; Anhui Bureau of Coal Geological Exploration ; Suzhou ; Anhui 234000)
中文关键词：三维地震 ; 资料处理 ; 高原地区 ; 黔西
英文关键词：3D seismic prospecting ; data processing ; high altitude area ; western Guizhou
出版日期：2008-11-25
机构：安徽省煤田地质局物探测量队;
年：2008
期：11
出版单位：中国煤炭地质

摘要

黔西某煤矿受区域性地质构造控制,矿井地貌属高原低山丘陵地貌,最大相对高差为319.2m。该区采用可控震源和炸药震源激发,原始资料信噪低,静校正问题严重。在资料处理过程中,主要采取了折射静校正、地表一致性振幅补偿技术、反褶积、三维剩余静校正与高精度速度分析、DMO叠加、随机噪音衰减、三维一步法偏移等处理措施,很好地克服了地形变化大、资料信噪比较低、野外静校正效果不明显、大倾角反射成像差、层速度突变等难题,最终处理的剖面归位准确,目的层连续性较好,达到了"三高"处理目的。
A coalmine in the western Guizhou is tectonically controlled and belongs to high altitude low mountain and hilly landforms,maximum relative elevation 319.2m.Vibrator and explosive sources are used in the area,S/N ratio of primary information is low,and serious problems existed in statics.In data processing,main measures of refraction statics,surface-consistent amplitude compensation,deconvolution,3D residual statics and precision velocity analysis,DMO stacking,random noise attenuation,3D one-step migration are adopted.Commendably overcome hard nuts of large topographic changes,low information S/N ratio,inconspicuous field statics effect,poor large dip angle reflection imaging and interval velocity mutation,thus made correct homing of final processed profiles,better target continuity,and "3 highs(high S/N ratio high fidelity and high resolution)" processing came true.

引文

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