S-wave velocity prediction using a modified P-L model

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2017S-wave velocity prediction using a modified P-L modelAuthors: Peijie YangShuihui LiuChangjiang WangHongmei LuoPeijie YangExploration and Development Research Institute of Shengli Oilfield, SinopecSearch for more papers by this author, Shuihui LiuExploration and Development Research Institute of Shengli Oilfield, SinopecSearch for more papers by this author, Changjiang WangExploration and Development Research Institute of Shengli Oilfield, SinopecSearch for more papers by this author, and Hongmei LuoExploration and Development Research Institute of Shengli Oilfield, SinopecSearch for more papers by this authorhttps://doi.org/10.1190/segam2017-17589208.1 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract S-wave velocity is very important for prestack inversion and rock physics modeling. S-wave logging is expensive and is commonly unavailable for many wells. To improve the accuracy of S-wave velocity prediction, we propose to predict the S-wave velocity using a modified P-L model. The modified P-L model simplifies the relationship between dry rock modulus and rock matrix modulus without reducing the prediction accuracy. Relationships among saturated rock elastic modulus, dry rocks modulus, rock matrix modulus, and mixed fluid modulus are built using Gassmann equation. P-wave velocity is calculated through these relationships. The objective function of S-wave velocity prediction is established by comparing the calculated and measured P-wave velocity. We rearrange the objective function into linear equations sets by means of inversion theory in order to reduce the computation complexity. Predicted S-wave velocities are finally acquired through a few iterations. Presentation Date: Wednesday, September 27, 2017 Start Time: 3:30 PM Location: 351D Presentation Type: ORAL Keywords: estimation, velocity, optimization, rock physicsPermalink: https://doi.org/10.1190/segam2017-17589208.1FiguresReferencesRelatedDetails SEG Technical Program Expanded Abstracts 2017ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2017 Pages: 6093 publication data© 2017 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 17 Aug 2017 CITATION INFORMATION Peijie Yang, Shuihui Liu, Changjiang Wang, and Hongmei Luo, (2017), "S-wave velocity prediction using a modified P-L model," SEG Technical Program Expanded Abstracts : 3750-3754. https://doi.org/10.1190/segam2017-17589208.1 Plain-Language Summary Keywordsestimationvelocityoptimizationrock physicsPDF DownloadLoading ...