Application of Parallel Multiple Attenuation Technology in Curvelet Domain in Lufeng Depression
YI Hao
XIAO Zhangbo
ZHANG Zhiwei
ZHANG Ming
ZHAO Yue
Abstract：The depth of sea water in Lufeng Depression is 200-400 m.As the seismic data are affected by the free surface,seabed,and strong interface of limestone,multiple waves are extremely developed.As a result,the weak effective reflection is covered by strong multiple waves,seriously affecting the imaging of the Paleogene interior.Consequently,it is a challenge to define the complex structural-stratigraphic trap,determine the fault intersection relationship,and define the shape of the sedimentary reservoir,which affects the study of the depression structure,the evaluation of structural lithologic trap,and the study of the reservoir.To solve this problem,this paper applied DWD and GSMP parallel multiple attenuation method in the curvelet domain to suppress multiple waves related to free surface,seabed,and limestone.Compared with other methods in the time domain,this method has good authenticity:It can suppress near-middle track multiple waves to the maximum extent without damaging effective reflection information and better improve the quality of gathers.In addition,the method reduces the effect of multiple near track on migration profile and achieves a good imaging effect,which meets the requirements of data use.
Keywords：Lufeng SagMultiple wavesCurvelet domainFree surface
Publication Date：2024-06-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 110-117 )