煤田采区高分辨三维地震勘探激发参数的优选
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摘要
三维地震勘探取得可靠数据的前提是获得最佳的的激发参数,即激发井深和激发药量。双井微测井是一种行之有效的确定激发参数的方法。以某区25m双井微测井为例,介绍了通过不同激发井深的接收排列图及频谱分析图确定潜水面位置及最佳激发深度的方法;在确定的最佳激发层位上进行不同药量试验,结合目的层有效波时窗频谱图,综合考虑有效信号、地震子波频谱及信噪比等因素选择最佳激发药量。通过双井微测井工作,最终确定潜水面位置为6m,最佳激发深度为11m,激发药量为2kg。
The 3D seismic exploration is one of most accurate exploration methods in coalfield,which has been widely used in coal and gas exploration.One of the most important processes in 3D seismic exploration is the choice of parameters which include shooting well-depth and shooting dose.The choice of the explosion parameters whether reasonable or not will has direct impact on accuracy.With the improvement of seismic exploration technique,quantitative definition is required in the choice of parameters in field work.Double-well micro-logging is an efficient method which can easily quantitatively fix the location of the explosion site.Besides,it can easily be applied.Based on this technique,combined with spectrum analysis and a large number of theoretical and experimental analyses,we have acquired an efficient way to select the best shooting well-depth and shooting dose.Moreover,this technique can give rise to high-frequency seismic wave,and then to achieve the goal of high-quality seismic data acquisition and economic cost savings.
The 3D seismic exploration is one of most accurate exploration methods in coalfield,which has been widely used in coal and gas exploration.One of the most important processes in 3D seismic exploration is the choice of parameters which include shooting well-depth and shooting dose.The choice of the explosion parameters whether reasonable or not will has direct impact on accuracy.With the improvement of seismic exploration technique,quantitative definition is required in the choice of parameters in field work.Double-well micro-logging is an efficient method which can easily quantitatively fix the location of the explosion site.Besides,it can easily be applied.Based on this technique,combined with spectrum analysis and a large number of theoretical and experimental analyses,we have acquired an efficient way to select the best shooting well-depth and shooting dose.Moreover,this technique can give rise to high-frequency seismic wave,and then to achieve the goal of high-quality seismic data acquisition and economic cost savings.
引文
[1]李天树,陈宝德,苏德仁.双井微测井技术在表层结构调查中的应用[J].石油物探,2004,43(5):471-474.
[2]桂杉,王佐强.三维地震勘探高精度采集方法研究[J].西部探矿工程,2009,12(8):95-98.
[3]云美厚,丁伟.地震分辨率新认识[J].石油地球物理勘探,2005,40(5):603-608.
[2]桂杉,王佐强.三维地震勘探高精度采集方法研究[J].西部探矿工程,2009,12(8):95-98.
[3]云美厚,丁伟.地震分辨率新认识[J].石油地球物理勘探,2005,40(5):603-608.
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