折射波静校正方法在苏码头构造的应用
|
摘要
苏码头构造由于受地形起伏和风化层厚度变化的影响,地震原始数据存在静校正问题,它的存在极大地影响着叠加剖面的成像效果和构造形态。为了消除近地表介质对反射波的这种影响,利用CGG地震资料处理系统中的折射波静校正方法,对原始地震数据进行线性动校正,确定折射层的速度、偏移距的范围,然后在共炮点域、共检波点域求取折射波静校正量,再对地震道数据进行校正,有效解决了静校正问题,使苏码头构造三维地震资料的有效反射同相轴变得更连续、更清晰,从而提高了叠加剖面的质量,改善了成像效果,为后续的处理工作打下了基础。图6参5
Sumutou structure is affected by both topographic irregularity and variation of wind deposits.So,a problem of static correction may exists in primary seismic data resulted in largely impacting on the imaging effect and structural shape of stack section.To eliminate the effect of near-surface media on refraction wave,the refraction wave static correction in CGG seismic-data interpretation system is utilized to carry out a linear dynamic correction to primary seismic data,to determine the refractive layer’s velocity and offset scope,to acquire the static correction mass at both common shot domain and common receiver domain and then to correct seismic trace data.For 3D seismic data of Sumatou structure,this correction is effective and can lead to the effective refraction event more continuous and clear.Moreover,the quality of stack section is increased,the imaging effect is improved and a next interpretation becomes easily.
Sumutou structure is affected by both topographic irregularity and variation of wind deposits.So,a problem of static correction may exists in primary seismic data resulted in largely impacting on the imaging effect and structural shape of stack section.To eliminate the effect of near-surface media on refraction wave,the refraction wave static correction in CGG seismic-data interpretation system is utilized to carry out a linear dynamic correction to primary seismic data,to determine the refractive layer’s velocity and offset scope,to acquire the static correction mass at both common shot domain and common receiver domain and then to correct seismic trace data.For 3D seismic data of Sumatou structure,this correction is effective and can lead to the effective refraction event more continuous and clear.Moreover,the quality of stack section is increased,the imaging effect is improved and a next interpretation becomes easily.
引文
1段洪有,曾庆才,李琛.复杂地表条件下折射静校正技术的应用[J].物探与物化,2005,29(2).
2车建英,张伟.初至折射波静校正技术在复杂探区地震数据处理中的应用[J].中国煤田地质,2006,18(1).
3李红.复杂地区静校正技术应用研究[J].安徽地质,2007,17(1).
4熊翳.复杂地区地震数据处理思路[M].北京:石油工业出版社,2002.
5徐楷亮.折射波静校正方法在复杂地表地区的应用—以四川东部地区为例[J].石油天然气学报,2006,28(4).
2车建英,张伟.初至折射波静校正技术在复杂探区地震数据处理中的应用[J].中国煤田地质,2006,18(1).
3李红.复杂地区静校正技术应用研究[J].安徽地质,2007,17(1).
4熊翳.复杂地区地震数据处理思路[M].北京:石油工业出版社,2002.
5徐楷亮.折射波静校正方法在复杂地表地区的应用—以四川东部地区为例[J].石油天然气学报,2006,28(4).
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心