关于多波多分量地震资料极性问题的讨论

Discussion on the polarity of multi-component multi-wave seismic data

(中国石油化工股份有限公司石油勘探开发研究院,北京 100083)

Exploration & Production Research Institute,SINOPEC,Beijing 100083,China

对于多波多分量地震资料,需要进行纵、横波联合层位对比,因此地震资料极性的确定非常重要。从地震反射系数和坐标系统二者之间的关系出发,探讨了纵波反射系数和转换横波反射系数之间的关系。基于一个3层各向同性介质模型,在地震资料采集和处理中常用坐标系下,按照美国勘探地球物理学家学会(SEG)地震记录极性标准,分析了多波多分量资料中各种反射波和初至波的极性情况以及它们之间的关系,提出了极性判断和选择的建议。

Since P-wave and S-wave joint horizon correlation should be carried out on multi-component multi-wave seismic data,the seismic polarity identification is very important.Starting from the relationship of seismic reflectivity and coordinate system,we probed the relationship between P-wave reflectivity and P-SV wave reflectivity.Based on a three-layer isotropic medium model,in the conventional coordinate system for seismic data acquisition and processing,according to the polarity standards of seismic record from SEG,we analyzed the polarity of all kinds of reflected wave and first break,as well as their relationship,and proposed suggestions for polarity discrimination and selection.