Broadening the bandwidth of seismic data by shallow well excitation

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2016Broadening the bandwidth of seismic data by shallow well excitationAuthors: Hongxiao NingDonglei TangBaohua YuYanhong ZhangHaili WangYongqing HeHongxiao NingBGP, CNPCSearch for more papers by this author, Donglei TangBGP, CNPCSearch for more papers by this author, Baohua YuBGP, CNPCSearch for more papers by this author, Yanhong ZhangBGP, CNPCSearch for more papers by this author, Haili WangBGP, CNPCSearch for more papers by this author, and Yongqing HeBGP, CNPCSearch for more papers by this authorhttps://doi.org/10.1190/segam2016-13778550.1 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract The very thick low velocity layer (LVL) area is a dual-complex area where both the near surface structure and the subsurface geologic structure are complex. The S/N of the seismic data from these areas is low, so it is difficult to image well. To image well, a high-density seismic survey is required to effectively suppress interferences. The location of the traditional shot-hole shooting method is the preferred layer on the basis of the near surface survey. That is not only costly for projects, but also produces results for imaging. By analyzing the near surface structure and the ghost reflection response of the thick LVL in this paper, a novel method is proposed: shooting close to the ground surface to reduce the ghost's impact on data quality, expand the bandwidth, and improve the S/N ratio. The theoretical analysis, site-point test and 2D lines test show that the method is feasible. Besides improving seismic data quality, this method greatly reduces the drilling difficulty and lowers the survey costs in complex areas. This research provides an economical and feasible shooting method in similar regions for implementing high density and efficient seismic data acquisition. Presentation Date: Tuesday, October 18, 2016 Start Time: 8:00:00 AM Location: 163/165 Presentation Type: ORAL Keywords: economics, survey design, acquisition, broadbandPermalink: https://doi.org/10.1190/segam2016-13778550.1FiguresReferencesRelatedDetails SEG Technical Program Expanded Abstracts 2016ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2016 Pages: 5654 publication data© 2016 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 01 Sep 2016 CITATION INFORMATION Hongxiao Ning, Donglei Tang, Baohua Yu, Yanhong Zhang, Haili Wang, and Yongqing He, (2016), "Broadening the bandwidth of seismic data by shallow well excitation," SEG Technical Program Expanded Abstracts : 1-5. https://doi.org/10.1190/segam2016-13778550.1 Plain-Language Summary Keywordseconomicssurvey designacquisitionbroadbandPDF DownloadLoading ...