黄土塬沟壑区地震野外资料采集方法研究
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摘要
为克服黄土塬沟壑区地震勘探难题,获得高信噪比、高分辨率的地震资料,安徽省煤田地质局物探测量队在技术装备提升的基础上进行了技术攻关,先后形成了针对黄土塬沟壑区域的地震资料采集方法,如弯曲观测的采集方法,利用可控震源与逢沟搭桥、隔梁放炮的变观直线采集方法,以及大直小弯的观测方法。在该类地区因地制宜选择使用不同方法,都获得了信噪比、分辨率较高的地震资料。通过实例比较各种方法的优点及局限性,认为对于黄土塬沟壑区,二维地震多(宽)直线平面观测采集方法是目前获得地质目标的高信噪比、高分辨率的理想方法。
In order to solve the hard nut of seismic prospecting in loess tableland ravine area,obtain high S/N ratio,high resolution seismic data,the Geophysical Prospecting and Surveying Team of Anhui Bureau of Coal Geological Exploration carried out to tackle and solve key technical problems based on equipment improving thus to form seismic data acquisition methods in loess tableland ravine area successively,such as slalom line data acquisition,vibrator using and gully bridging,shooting from other side of loess ridges to create converted straight line acquisition method,and straight on the whole,turning locally observation method.Different methods have used in this kind areas by adjust measures to local conditions and obtained higher S/N ratio and resolution seismic data.Through contrast strongpoint and limitations of various methods,considered that the 2D seismic multiple(wide) straight line observation plane data acquisition method is an ideal method to obtain high S/N ratio,high resolution data of geological targets in loess tableland ravine areas at present.
In order to solve the hard nut of seismic prospecting in loess tableland ravine area,obtain high S/N ratio,high resolution seismic data,the Geophysical Prospecting and Surveying Team of Anhui Bureau of Coal Geological Exploration carried out to tackle and solve key technical problems based on equipment improving thus to form seismic data acquisition methods in loess tableland ravine area successively,such as slalom line data acquisition,vibrator using and gully bridging,shooting from other side of loess ridges to create converted straight line acquisition method,and straight on the whole,turning locally observation method.Different methods have used in this kind areas by adjust measures to local conditions and obtained higher S/N ratio and resolution seismic data.Through contrast strongpoint and limitations of various methods,considered that the 2D seismic multiple(wide) straight line observation plane data acquisition method is an ideal method to obtain high S/N ratio,high resolution data of geological targets in loess tableland ravine areas at present.
引文
[1]李庆忠.论地震次生干扰[J].石油地球物理勘探,1983,(3-4):207-225;295-313.
[2]王卫华.纵波勘探中的炸药激发方式分析[J].石油地球物理勘探,1999,34(3):249-259.
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[4]王永刚,李振春,高洪海,等.增加深层下传能量的野外试验及理论分析[J].石油地球物理勘探,2001,36(2):231-237.
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[7]王增明.地震采集中检波器自然频率的试验分析[J].石油地球物理勘探,2003,38(3):308-316.
[2]王卫华.纵波勘探中的炸药激发方式分析[J].石油地球物理勘探,1999,34(3):249-259.
[3]郭向宇,凌云,魏修成.近地表散射波的叠后衰减[J].石油地球物理勘探,2002,37(3):201～208.
[4]王永刚,李振春,高洪海,等.增加深层下传能量的野外试验及理论分析[J].石油地球物理勘探,2001,36(2):231-237.
[5]李庆忠,陈祖钧.组合效应对反射波的压制和改造[J].石油地球物理勘探,1984,2(1).
[6]李庆忠.地震高分辨率勘探中的误区与对策[J].石油地球物理勘探,1998,32(6):751-783.
[7]王增明.地震采集中检波器自然频率的试验分析[J].石油地球物理勘探,2003,38(3):308-316.
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