A novel method for direct fluid factor extraction

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2014A novel method for direct fluid factor extractionAuthors: Peijie Yang*Shuhui LiuXing MuChangjiang WangHongmei LuoGuodong LiPeijie Yang*SINOPECSearch for more papers by this author, Shuhui LiuSINOPECSearch for more papers by this author, Xing MuSINOPECSearch for more papers by this author, Changjiang WangSINOPECSearch for more papers by this author, Hongmei LuoSINOPECSearch for more papers by this author, and Guodong LiSINOPECSearch for more papers by this authorhttps://doi.org/10.1190/segam2014-0333.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Prestack seismic inversion is by far the most effective method for fluid discrimination. A novel method was developed that uses variable points-constraint strategy to direct extract Gassmann fluid item (GFI) from prestack data. The initial objective function was build combining likelihood function, priori information and GFI approximate equation. The final objective function was acquired by adding a variable number of constraint points to the initial objective function. Three different points-constraint patterns were discussed, and different constraint effects were illustrated using synthetic data. Instead of initial model, this method used constraint model to improve the accuracy and stability of the extraction results. It did not need to obtain P-wave velocity, S-wave velocity and density first, and therefore can avoid accumulation of error that often happens with indirect approach. Model validation and actual application results showed that the proposed method could produce good results even if the SNR of prestack data is pretty low. Keywords: AVO/AVA, inversion, prestack, fluidPermalink: https://doi.org/10.1190/segam2014-0333.1FiguresReferencesRelatedDetails SEG Technical Program Expanded Abstracts 2014ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2014 Pages: 5183 publication data© 2014 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 05 Aug 2014 CITATION INFORMATION Peijie Yang*, Shuhui Liu, Xing Mu, Changjiang Wang, Hongmei Luo, and Guodong Li, (2014), "A novel method for direct fluid factor extraction," SEG Technical Program Expanded Abstracts : 3174-3178. https://doi.org/10.1190/segam2014-0333.1 Plain-Language Summary KeywordsAVO/AVAinversionprestackfluidPDF DownloadLoading ...