混合采集地震偏移成像分辨率分析  

Imaging resolution analysis of seismic blended acquisition

作　　者：王锴 魏伟[1,2,3] 符力耘[4] WANG Kai;WEI Wei;FU LiYun(Key Laboratory of Petroleum Resource Research,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;Innovation Academy for Earth Science,Chinese Academy of Sciences,Beijing 100029,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Deep Oil and Gas(China University of Petroleum(East China)),Qingdao 266580,China)

机构地区：[1]中国科学院地质与地球物理研究所,中国科学院油气资源研究重点实验室,北京100029 [2]中国科学院地球科学研究院,北京100029 [3]中国科学院大学,北京100049 [4]中国石油大学(华东)深层油气重点实验室,青岛266580

出　　处：《地球物理学进展》2021年第6期2599-2609,共11页Progress in Geophysics

基　　金：国家重点研发计划(2017YFB0202903)资助。

摘　　要：混合采集技术是同时激发技术的拓展,是对常规地震采集技术的一次重大升级.与常规采集技术相比,混合采集技术通常能提供更高的炮密度,改善地震成像的品质,但也可能会带来传统采集所没有的混合噪声,降低地震成像的质量.如何根据具体工区的地质地球物理条件来选择合适的混合采集观测参数以实现最佳的勘探效益,已成为当前地震勘探中迫切需要解决的瓶颈问题之一.然而,目前对于混合采集观测系统参数设计的研究仍然较少.基于此,本文提出了一种混合采集成像分辨率评价方法,首次将震源密度比、采集时间比和混合度等混合采集参数纳入到复杂介质下分辨率评价算法,以在采集施工前实现对混合采集方案效能的定量预测,进而反馈混合采集参数设计,从数据采集的源头提高复杂地区混合采集的偏移成像效果.Blended acquisition is an expansion of simultaneous shooting technology, which is regarded to be a significant revolution of conventional acquisition. It can effectively deliver high quality images by providing a higher shot density than conventional acquisition. However, blended acquisition may also bring blended noise that does not exist in conventional acquisition, which reduces the quality of seismic imaging. Therefore, an urgent problem in current seismic exploration is to select appropriate blended acquisition parameters according to the geological and geophysical conditions of a specific work area to achieve the best exploration benefits. However, there are still rare studies on the design of the blended acquisition parameters. In this manuscript, we propose a method to evaluate the imaging resolution of blended acquisition, which for the first time takes blended acquisition parameters such as source density ratio, survey time ratio and blending factor into consideration. Using this method, we can predict the efficiency of the acquisition scheme and design the blended acquisition parameters to improve the imaging effect of blended acquisition before construction.

关 键 词：混合采集 成像分辨率 混合采集参数 

分 类 号：P631[天文地球—地质矿产勘探]