折射波静校正方法在苏码头构造的应用  

APPLICATION OF REFRACTION WAVE STATIC CORRECTION TO SUMATOU STRUCTURE

作　　者：孔令霞[1] 邹定永[1] 屠志慧[1] 李楠[1] 张琳羚[2] 

机构地区：[1]中国石油西南油气田公司勘探开发研究院 [2]中国石油西南油气田公司川中油气矿

出　　处：《天然气勘探与开发》2010年第3期16-19,共4页Natural Gas Exploration and Development

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。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.

关 键 词：折射波静校正 线性动校 偏移距 信噪比 同相轴 

分 类 号：P631.4[天文地球—地质矿产勘探]