Delineating the gas reservoir with the C‐wave diodic effect correction in Qaidam basin, Northwest China

Abstract

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2011Delineating the gas reservoir with the C‐wave diodic effect correction in Qaidam basin, Northwest ChinaAuthors: Sihai ZhangXiang‐Yang LiHengchang DaiXiaoming LiZhiheng YinSihai ZhangChina University of PetroleumSearch for more papers by this author, Xiang‐Yang LiSearch for more papers by this author, Hengchang DaiBritish Geological SurveySearch for more papers by this author, Xiaoming LiChina University of PetroleumSearch for more papers by this author, and Zhiheng YinChina University of PetroleumSearch for more papers by this authorhttps://doi.org/10.1190/1.3627615 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract The C‐wave imaging may be degraded by the diodic effect introduced by the gas cloud though C‐waves have been commonly used to image through gas cloud. This diodic effect may be compensated with a velocity perturbation method which decouples the diodic moveout into two parts: the base velocity and the velocity perturbation. In this paper, the velocity perturbation is written with base velocity and the PS velocity of positive and negative offset. And the relation between velocity perturbation and gas reservoir is discussed. A land 2D3C seismic dataset is analyzed from the Sanhu area in the Qaidam basin, northwest China and significant diodic effects are observed in the data. The perturbation approach is applied to this data and the resultant C‐wave imaging and the details of the reservoir structure are significantly improved. The characterization of the reservoir boundary using velocity perturbation is well consistent with the real reservoir.Permalink: https://doi.org/10.1190/1.3627615FiguresReferencesRelatedDetails SEG Technical Program Expanded Abstracts 2011ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2011 Pages: 4424 Publisher:Society of Exploration Geophysicists HistoryPublished Online: 08 Aug 2011 CITATION INFORMATION Sihai Zhang, Xiang‐Yang Li, Hengchang Dai, Xiaoming Li, and Zhiheng Yin, (2011), "Delineating the gas reservoir with the C‐wave diodic effect correction in Qaidam basin, Northwest China," SEG Technical Program Expanded Abstracts : 2064-2068. https://doi.org/10.1190/1.3627615 Plain-Language Summary PDF DownloadLoading ...