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Multilevel Composition: An Innovative Rgb-Based Technique for Elucidating Subtle Connections between Intricate Geological Features on Three-Dimensional Seismic Reflection Data
- Source :
- SSRN Electronic Journal.
- Publication Year :
- 2022
- Publisher :
- Elsevier BV, 2022.
-
Abstract
- Advanced seismic data and multi-attribute visualization techniques such as the red-green-blue (RGB) have considerably augmented the capability of interpreters to characterize geological features on three-dimensional (3D) seismic reflection datasets. However, high resolution investigation of complex features remains challenging, requiring additional approaches to improve all round interpreters’ performance. Intervals of interest are commonly associated with intricate geological features, including channel systems and fluid migration pathways, which may be concealed in the dataset as multilevel high-amplitude seismic reflectivity bands. Delineating such features onto a single, intuitive map is often an arduous task. This may prove even more demanding where such features are spatially connected and occur near discontinuous and difficult-to-interpret horizons. To aid this task, we have developed an innovative technique involving RGB-blending and composition of multilevel amplitude maps, multilevel composition. Multilevel composition involves identification of high-amplitude features of geological interest within the dataset and defining their window of occurrence . This is followed by the interpretation of at least one reflecting horizon within/around the target window and the division of the window into three sub-windows based on the spatiotemporal distribution of the geological features. Amplitude-accentuating seismic attributes are computed for the sub-windows, the resulting maps are assigned to red (shallowest level), green (intermediate level) and blue (deepest level) colors and are co-rendered in the RGB color space. This results in a single map in which inter-window/layer depth information is coded in colors for reliable representation of the actual geology . We demonstrate the efficacy of this technique by applying it to characterize classic deep-water depositional elements in the eastern Nile fan, eastern Mediterranean, and to investigate seafloor seeps and underlying fluid plumbing systems beneath the Omakere Ridge, offshore New Zealand, using high-resolution 3D seismic data. The new technique is simple and easy to execute and enhances existing seismic interpretation workflows.
Details
- ISSN :
- 15565068
- Database :
- OpenAIRE
- Journal :
- SSRN Electronic Journal
- Accession number :
- edsair.doi.dedup.....6653a72424816e7c54e0538707d9bc65
- Full Text :
- https://doi.org/10.2139/ssrn.4090491