Quality control and optimization of partial-stack datasets in pre-stack seismic inversion
-
摘要: 高质量的部分叠加道集数据是地震叠前反演的基础,然而不同偏移距叠加道集数据之间经常出现时间、振幅等不闭合现象,直接进行叠前反演则会影响反演弹性参数的可信度。因此,有必要对叠前反演道集进行质控及优化,以提高近、中、远偏移距道集的闭合效果。以残差准相关系数阈值为标准对部分叠加道集数据进行有限的调整,同时利用校正量统计图谱分析和递归插值的方法,对校正的时间偏移量和振幅缩放系数进行控制和优化,最终得到闭合效果较好的部分道集叠加数据体。实例表明使用校正及优化后的部分叠加道集数据进行反演能够显著提高叠前反演质量。Abstract: High quality partial-stack seismic data are the foundation of pre-stack inversion; however, the mis-tie and the phase displacement of partial-stack seismic datasets often lead to unconfident elastic parameters. It's very necessary for seismic datasets to control quality in order to improve the reliability of different offset gathers. In the paper, partial-stack seismic could be adjusted based on the standard of threshold value of residual quasi-correlation, and then seismic processing of phase correction and limited time shift would be executed based on the method of static graphs and recursive interpolate. The actual data inversion shows that under the responsible quality control, the partial-stack datasets correction processing could improve the inversion quality obviously.
-
[1] 王保丽,印兴耀,张繁昌.弹性阻抗反演及应用研究[J].地球物理学进展,2005,20(1):89-92. [2] 强敏,周义军,钟艳,等.基于部分叠加数据的叠前同时反演技术的应用[J].石油地球物理勘探,2010,45(6):895-898. [3] 黄饶,刘志斌.叠前同时反演在砂岩油藏预测中的应用[J].地球物理学进展,2013,28(1):380-386. [4] 李爱山,印兴耀,张繁昌,等.叠前AVA多参数同步反演技术在含气储层预测中的应用[J].石油物探,2007,46(1):64-68. [5] 张广智,王文龙,印兴耀,等.基于射线理论的角度道集提取方法综述[J].地球物理学进展,2011,26(5):1696-1707. [6] Avseth P,Mukerji T,Mavko G.Quantitative seismic interpretation[M].Cambridge,UK:Cambridge University Press,2005. [7] 陆自清,郭媛.叠前反演中部分叠加道集的优化校正[J].石油地球物理勘探,2015,50(1):67-70. [8] Loures L G,Moraes F.Local Porosity Inversion of Multiple Geophysical Data Sets. Part II:Incorporating Elastic Seismic Modeling.7th International Congress of the Brazilian Geophysical Society. Bahia, Brazil, 2001. [9] 李庆忠.岩石的纵、横波速度规律[J].石油地球物理勘探,1992,27(1):1-12. -
点击查看大图
计量
- 文章访问数: 765
- HTML全文浏览量: 41
- PDF下载量: 528
- 被引次数: 0
下载:
苏公网安备32021102000780号