Matches in SemOpenAlex for { <https://semopenalex.org/work/W3413732> ?p ?o ?g. }
Showing items 1 to 65 of
65
with 100 items per page.
- W3413732 abstract "Reflection seismics can be used to determine the geology of the subsurface. An image of the subsurface is obtained by migration of the seismic data. The migration needs a velocity model, which is normally determined from (normal moveout) NMO-velocity analysis. However, in areas of complex geology NMO-velocity analysis fails, and migration-velocity analysis (an iterative migration process) is necessary. The result of prestack-migration velocity analysis is usually a smooth migration velocity model (i.e., the exact structure and interval velocities of the subsurface are not known). For an accurate interpretation of the geology, it is necessary to find the structural velocity model. The structure boundaries can be determined from the migrated image of the subsurface, using geologic constraints, such as non-crossing interfaces, known dip limits, well-log information, etc. To determine the velocities inside the structures, geological information, such as behavior of velocities inside the structures (known from well logs or common geological sense), is used to constrain the velocity inversion. Two approaches to the velocity inversion are investigated: (1) an extension of migration-velocity analysis and (2) a method that used amplitude-vs-offset information in the prestack migrated data. The smooth velocity model is converted to a structural model using the boundaries in themore » migrated image, and the velocity model is updated with an iterative method that minimizes the curvature in the CDP-gather after migration. The method flattens events in the gather before stack, thus improving the stackpower in the stacked image. Events are defined along lines of equal instantaneous phase. So, the method incorporates traveltime and phase information in the inversion. Amplitude information is considered in the second approach.« less" @default.
- W3413732 created "2016-06-24" @default.
- W3413732 creator A5082528654 @default.
- W3413732 date "1988-03-01" @default.
- W3413732 modified "2023-09-26" @default.
- W3413732 title "Velocity inversion using geological constraints" @default.
- W3413732 hasPublicationYear "1988" @default.
- W3413732 type Work @default.
- W3413732 sameAs 3413732 @default.
- W3413732 citedByCount "0" @default.
- W3413732 crossrefType "journal-article" @default.
- W3413732 hasAuthorship W3413732A5082528654 @default.
- W3413732 hasConcept C118496448 @default.
- W3413732 hasConcept C127313418 @default.
- W3413732 hasConcept C13280743 @default.
- W3413732 hasConcept C165205528 @default.
- W3413732 hasConcept C175291020 @default.
- W3413732 hasConcept C1893757 @default.
- W3413732 hasConcept C195065555 @default.
- W3413732 hasConcept C199360897 @default.
- W3413732 hasConcept C2524010 @default.
- W3413732 hasConcept C2776871995 @default.
- W3413732 hasConcept C33923547 @default.
- W3413732 hasConcept C41008148 @default.
- W3413732 hasConcept C77928131 @default.
- W3413732 hasConceptScore W3413732C118496448 @default.
- W3413732 hasConceptScore W3413732C127313418 @default.
- W3413732 hasConceptScore W3413732C13280743 @default.
- W3413732 hasConceptScore W3413732C165205528 @default.
- W3413732 hasConceptScore W3413732C175291020 @default.
- W3413732 hasConceptScore W3413732C1893757 @default.
- W3413732 hasConceptScore W3413732C195065555 @default.
- W3413732 hasConceptScore W3413732C199360897 @default.
- W3413732 hasConceptScore W3413732C2524010 @default.
- W3413732 hasConceptScore W3413732C2776871995 @default.
- W3413732 hasConceptScore W3413732C33923547 @default.
- W3413732 hasConceptScore W3413732C41008148 @default.
- W3413732 hasConceptScore W3413732C77928131 @default.
- W3413732 hasLocation W34137321 @default.
- W3413732 hasOpenAccess W3413732 @default.
- W3413732 hasPrimaryLocation W34137321 @default.
- W3413732 hasRelatedWork W1488175013 @default.
- W3413732 hasRelatedWork W1968884630 @default.
- W3413732 hasRelatedWork W1972577250 @default.
- W3413732 hasRelatedWork W2006626531 @default.
- W3413732 hasRelatedWork W2058985615 @default.
- W3413732 hasRelatedWork W2062304412 @default.
- W3413732 hasRelatedWork W2076377057 @default.
- W3413732 hasRelatedWork W2229739156 @default.
- W3413732 hasRelatedWork W2239374205 @default.
- W3413732 hasRelatedWork W2371557223 @default.
- W3413732 hasRelatedWork W2373815422 @default.
- W3413732 hasRelatedWork W2393485287 @default.
- W3413732 hasRelatedWork W2562941800 @default.
- W3413732 hasRelatedWork W2586545423 @default.
- W3413732 hasRelatedWork W2998199334 @default.
- W3413732 hasRelatedWork W30082167 @default.
- W3413732 hasRelatedWork W82755878 @default.
- W3413732 hasRelatedWork W1536086400 @default.
- W3413732 hasRelatedWork W2514394563 @default.
- W3413732 hasRelatedWork W2776993625 @default.
- W3413732 isParatext "false" @default.
- W3413732 isRetracted "false" @default.
- W3413732 magId "3413732" @default.
- W3413732 workType "article" @default.