三维转换波处理技术在海拉尔贝39井复杂构造区的应用

3D converted-wave processing in Well Bei 39 complex structure area,Hailar Basin

在海拉尔贝39井构造复杂区,应用常规的三分量处理技术难以解决该地区的转换波成像问题。本文针对该地区的转换波噪声、静校正及成像等问题,应用了波动方程自适应折射噪声衰减技术、全局寻优和剩余迭代相结合的转换波静校正技术、复杂构造转换波方位各向异性校正及复杂构造叠前时间偏移等关键技术,对该地区的三维转换波资料进行了处理,最终取得较好的成像效果,为后续的纵横波联合解释和反演奠定了基础。

It is very difficult to image converted-waves with conventional 3component processing methods in Well Bei 39 area,Hailar Basin due to complex subsurface.To overcome the problem,we first use self-adaption refraction noise attenuation based on wave equations and converted-wave statics combining global optimization with residual iteration.Then we adopt azimuthal anisotropy corrections of converted-wave and prestack time migration for complex structure.As result,noise is removed andstatics are corrected.Good image of target zones is obtained.Much better converted-wave image offers a good foundation for future multi-wave interpretation and inversion.