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- W4387229845 abstract "Abstract Objectives/Scope: The primary aim of this study is to illustrate the substantial advantages of utilizing Offshore Bottom Nodes (OBN) with four components (4C) for enhancing seismic image quality, thereby offering improved input for both static and dynamic models. Furthermore, the findings have proven instrumental in resolving long-standing discrepancies regarding fluid contacts in Field A. Methods, Procedures, Process: The approach employed in this study involved a combination of well-established acquisition parameters and the implementation of a novel imaging algorithm, primarily the Full Waveform Inversion (FWI). By optimizing the acquisition setup, we achieved enhanced imaging of deeper zones, effectively reducing structural uncertainty and providing greater clarity on the structural shapes within these areas. Additionally, this approach facilitated improved continuity of amplitude in the presence of shallow gas. Fluid contact analysis at the well level was conducted by integrating log data, mud logs, pressure points, and production history for each well. Structural comparisons were also performed to highlight the notable differences in image quality when compared to traditional APSTM seismic images. Results, Observations, Conclusions: The findings of this study demonstrate that fluid contact values, as determined through well logs, now align with the updated structural understanding of faulting and compartmentalization. This has led to enhanced structural interpretation, featuring more distinct fault imaging and partial resolution of shallow gas issues. The presence of shallow gas in previous seismic data resulted in the appearance of structural anomalies, causing images to depict sags as faults. With the new seismic images, multiple sand body pinch-outs were more readily identifiable, and boundaries were captured with greater clarity due to the higher resolution. Additionally, the generated Root Mean Square Attribute (RMS) significantly contributed to determining Field A's geological body, enabling accurate facies distribution across the field. Novel/Additive Information: This study's innovative approach has yielded valuable insights, primarily stemming from differences in seismic acquisition techniques. The previous dataset employed a streamer method, whereas the latest dataset utilized an OBN (Ocean Bottom Node) approach. The new dataset features a more advanced seismic imaging technique, leveraging full-waveform inversion. The key lesson learned is the importance of continually updating interpretations based on the most current datasets, whether they are obtained through reprocessing or re-acquisition of data." @default.
- W4387229845 created "2023-10-02" @default.
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- W4387229845 date "2023-10-02" @default.
- W4387229845 modified "2023-10-03" @default.
- W4387229845 title "Enhancing Structural Imaging and Well Data Integration with OBN 4C Data: Addressing Geological Uncertainties in Complex Deep Reservoirs" @default.
- W4387229845 cites W4248700707 @default.
- W4387229845 doi "https://doi.org/10.2118/216454-ms" @default.
- W4387229845 hasPublicationYear "2023" @default.
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