时间域OVT处理质量控制方法  

Quality control method of OVT processing in the time domain

作　　者：瞿长青[1] 李传强[1] 马建波[1] 王东奎[1] 王忠军[1] QU Changqing;LI Chuanqiang;MA Jianbo;WANG Dongkui;WANG Zhongjun(Geophysical Research Institute of Zhongyuan Oil Field,Sinopec,Puyang 457001,China)

机构地区：[1]中国石化中原油田分公司物探研究院,河南濮阳457001

出　　处：《石油物探》2023年第3期483-497,共15页Geophysical Prospecting For Petroleum

基　　金：中国石化科技部技术攻关项目(P22146)资助。

摘　　要：高密度宽方位地震勘探是现阶段油气勘探的主要方向之一,作为面向高密度宽方位地震数据处理的OVT域处理技术也得到了快速发展,特别是时间域的OVT处理,其基本流程、方法已较为成熟,但如何做好OVT处理每一个流程节点的质量控制工作,目前业界还没有形成较为完整、统一的质量控制标准。以时间域OVT处理流程为主线,首先介绍了目前通用的时间域OVT处理流程,包括OVT域道集分选、OVT道集细分、OVT域插值、OVT域叠前时间偏移以及OVT道集的速度方位各向异性校正;然后,基于OVT域的通用处理流程,详细论述了时间域OVT处理的质量控制手段,主要包括OVT道集的空间分布、方位角偏移距属性、OVT道集单次记录、OVT道集单次偏移、OVT道集显示、OVT道集偏移距振幅属性等。四川盆地TNB探区实际应用结果表明,系统的OVT域处理质量控制可以提升时间域OVT的处理效果。时间域OVT处理质量控制方法研究加快了现阶段的OVT域处理技术的推广应用。Currently,high-density and wide azimuths are one of the main development trends in seismic exploration.It also brings about rapid progress in OVT processing technology.It is well known that OVT processing in the time domain is relatively mature.However,uniform standards have not yet been developed for quality control of each flow of OVT processing.With this goal in mind,we review the status of OVT processing.First,we introduce the current general time domain OVT processing flows,namely,domain gather sorting,gather swap,domain interpolation,domain pre-stack time migration and velocity azimuth anisotropy correction.Second,a detailed quality control method based on every flow of OVT processing,namely,checking the spatial distribution of the OVT gather,azimuth offset attribute,single-fold section of the OVT,and both the single pre-stack time migration and offset amplitude attribute of the OVT gather.The practical application results for the TNB exploration area in the Sichuan Basin showed that the results of OVT processing can be improved by implementing these quality control methods.Continued research on the quality control method of OVT processing in the time domain can promote the popularization and application of OVT processing technology in the future.

关 键 词：OVT 高密度 质量控制 方位角 偏移距 互换 

分 类 号：P631[天文地球—地质矿产勘探]