一体化质控的宽频保幅处理技术在西湖凹陷S气田的应用
Application of broadband amplitude-preserving processing with integrated quality control to S gasfield,Xihu depression,East China Sea
王腊梅1
作者信息
- 1. 中海石油(中国)有限公司上海分公司 上海 200335
- 折叠
摘要
东海西湖凹陷S气田地震资料品质较低且地质条件复杂,储层纵向非均质性较强,利用地震数据刻画不同厚度的砂体特征难度较大,叠前反演成果与井点实钻差异较大.通过开展宽频保幅处理与储层预测一体化的研究,采取一体化的质控技术,对宽频保幅处理的干扰波压制、鬼波和多次波压制、道集优化处理等关键环节进行了精细的参数试验和科学的质控分析.应用结果表明:①地震处理成果频率信息丰富;②地震信噪比有明显提升;③远道地震信息自然真实,CRP道集的AVO特征清楚.结论认为:有效消除了地震干扰波的影响,较好地保护了地震数据的低频和高频信号,提高了对不同厚度储层的预测精度.
Abstract
With poor quality of seismic data,S gasfield,Xihu depression,East China Sea,features complex geological conditions and strong vertical heterogeneity in reservoirs,which may make the characterization of sandbodies with different thickness challenging by using seismic data and lead to findings in great discrepancy between prestack inversion and actual drilling.Thus,integrated broadband amplitude-preserving processing into reservoir prediction,one technology of integrated quality control was adopted to conduct a fine test on parameters and scientific quality-control analysis for some key linkages,such as interference-wave together with ghost and multiple suppression from broadband amplitude-preserving processing,and gather optimization.Results show that(i)there exists nu-merous information on frequency in seismic-processing results;(ii)the signal-to-noise ratio is significantly improved;and(iii)infor-mation on remote trace gather is so natural and real,and AVO attributes of CRP gather are evident.It is concluded that the technology of broadband amplitude-preserving processing can effectively eliminate the influence of interference wave,protect low-and high-fre-quency signals of seismic data with effect,and increase an accuracy to predict reservoirs with various thickness.
关键词
西湖凹陷/宽频保幅处理/鬼波压制/多次波/一体化质控/道集优化Key words
Xihu depression/Broadband amplitude-preserving processing/Ghost suppression/Multiple wave/Integrated quality con-trol/Gather optimization引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据