摘要
针对井间地震资料处理中现有上行反射P波提取方法的不足,提出了基于AVA道集的三分量井间地震资料上行反射P波分离方法。首先对水平分量X和Y的直达波场进行水平定位,旋转得到两井平面内的径向分量R,然后对垂直分量Z和径向分量R进行直达波去除、管波衰减和上行波场分离,利用直达波层析反演结果建立速度模型,对垂直分量Z和径向分量R的上行波场分别进行上行反射P波射线追踪,得到两个相应的AVA道集,根据上行反射P波的入射角大小进行上行反射P波分离和提取,最后完成上行反射P波的叠加成像。模型计算和实际资料的处理结果表明,该方法可以有效提取三分量资料的上行反射P波能量,保证了上行反射P波叠加成像的精度和保真度。
In order to effectively separate and extract up-going reflected P-wave in crosswell seismic data,a new method was presented. Firstly,the radial component R in the plane of the two wells was obtained by horizontally orientating and rotating the first arrival of X and Y component.Secondly,direct wave removal,tubing wave attenuation and upgoing wave separation were implemented on vertical Z component and radial R component.Thirdly,the direct wave tomography inversion result was used to build velocity model.Upgoing reflected P-wave tracing was carried out on the up-going wave field of vertical Z component and radial R component,and two corresponding AVA gathers were obtained.Finally,the separation and extraction of up-going reflected P-wave was proceeded in terms of its incident angle,the up-going reflected P-wave was stacked and imaged.Model computation and actual data processing results indicated that the method can effectively extract the up-going reflected P-wave in three-component data,which ensured the accuracy and fidelity of stack imaging of up-going reflected P-wave.
出处
《石油物探》
EI
CSCD
北大核心
2010年第5期516-521,20,共6页
Geophysical Prospecting For Petroleum
基金
国家高技术研究发展计划(863)项目(2007AA060503)资助
