Integrated well‐log, VSP, and surface seismic analysis of near‐surface glacial sediments: Red Lodge, Montana

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2011Integrated well‐log, VSP, and surface seismic analysis of near‐surface glacial sediments: Red Lodge, MontanaAuthors: Jingqiu HuangJoe WongJingqiu HuangUniversity of HoustonSearch for more papers by this author and Joe WongUniversity of Calgary.Search for more papers by this authorhttps://doi.org/10.1190/1.3628136 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract We report on a suite of geophysical surveys conducted on glacial sediments near Red Lodge, Montana. The University of Houston (with assistance from University of Calgary, GEDCO, and UT‐Austin personnel) conducted VSP and well log surveys in the 115m‐deep, PVC‐cased water well, GB‐1, located on the glacial benches. The multi‐offset VSP was undertaken using surface sources (an accelerated weight drop and sledge hammer) with a hydrophone string and downhole, wall‐clamping, 3‐component geophone. The well logs included measurements of conductivity, radioactivity (gamma ray), temperature, and sonic velocity. Sonic and VSP velocities ranged from 1500m/s in the very near surface to 3000m/s at 85m depth. A distinct black clay layer (with high conductivity, high gamma ray, and low velocity) was penetrated at 85m. High‐resolution 2D and 3D seismic surveys, using a sledge hammer source, showed a number of reflectors to about 150ms two‐way traveltime. On the L‐plot composite displaying well log data, synthetic seismograms, and the VSP corridor stack, a reflection at 80ms correlated with the 85m interface Various other reflections in the VSP and surface seismic data were interpreted to represent glacial deposit layers and water zones (from the perforation logs).Permalink: https://doi.org/10.1190/1.3628136FiguresReferencesRelatedDetails 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 Jingqiu Huang and Joe Wong, (2011), "Integrated well‐log, VSP, and surface seismic analysis of near‐surface glacial sediments: Red Lodge, Montana," SEG Technical Program Expanded Abstracts : 526-530. https://doi.org/10.1190/1.3628136 Plain-Language Summary PDF DownloadLoading ...