海南岛西部海域海砂资源调查单道地震数据处理方法  

Single-channel Seismic Processing Method for sea Sand Survey in the Western Ocean of Hainan

作　　者：张匡华 王嘉琳 韩孝辉 傅人康 林明智 陈波 仝长亮 钟宙灿[1,4] ZHANG Kuanghua;WANG Jialin;HAN Xiaohui;FU Renkang;LIN Mingzhi;CHEN Bo;TONG Changliang;ZHONG Zhoucan(Hainan Key Laboratory of Marine Geological Resources and Environment,Haikou,Hainan 570206,China;Marine Geological Survey Institute of Hainan Province,Haikou,Hainan 570206,China;Hainan Geology Detection and Research Centre,Haikou,Hainan 570206,China;Comprehensive Geologic Survey of Hainan Province,Haikou,Hainan 570206,China)

机构地区：[1]海南省海洋地质资源与环境重点实验室,海南海口570206 [2]海南省海洋地质调查研究院,海南海口570206 [3]海南省地质测试研究中心,海南海口570206 [4]海南省地质综合勘察院,海南海口570206

出　　处：《世界核地质科学》2023年第3期835-842,共8页World Nuclear Geoscience

基　　金：海南省海洋地质资源与环境重点实验室自主课题(编号:HNHYDZZYHJZZ003);海南省科技计划三亚崖州湾科技城联合项目(编号:420LH029);琼州海峡潮流沙脊动力地貌过程研究及稳定性评估(编号:422RC800);海南省财政厅项目“海南岛周边海域海砂资源调查评价”联合资助。

摘　　要：为提高在海砂资源调查中单道地震勘探效果,文章对海南岛西部海域单道地震数据进行细致分析和参数试验,制定针对性的处理流程,处理后剖面的深部能量得到加强,分辨率和信噪比明显提高,真实层位同相轴更加连续,多次波得到有效压制后对真实地层的影响较小,有助于更精确的厘定研究区地层结构、圈定出砂体范围,为钻孔施工设计提供充分的依据。本次研究提出,在类似环境单道地震数据的处理中,采用相对保幅处理有助于保护有效信号,主要处理参数须经过反复对比分析后确认,去除海底反射多次波前须对随机噪音进行衰减,采用精细拾取的海底静态漂移作为多次波模型可获得较好的多次波压制效果。Single-channel seismic exploration is an important means on sea sand survey.On the basis of the careful analysis of acquired single-channel seismic profiles in the western ocean of Hainan and the test of seismic processed parameters,the processing flow for sea sand survey was established and used to process the profile data which produced good result.In order to protect the effective signals as much as possible,relative amplitude-preserving processing should be adopted in the single-channel seismic processing on sea sand survey;accurate seabed-picking is the precondition to ensure the quality of seismic processing,and human computer interaction is the key to ensure the accuracy of seabed-picking.Repeated comparative analysis shall be finished before determining the main processing parameters.Random noise shall be attenuated before removing multiples;Multiple models can be used to obtain accurate picked seabed with static drift,and got clearly removed multiples.

关 键 词：海南岛 海砂调查 单道地震 地震处理 

分 类 号：P315.6[天文地球—地震学]