| Autor: |
Isabelle Lecomte, Thea Sveva Faleide, Ivar Midtkandal, Sverre Planke, Alvar Braathen, Ingrid Anell, Mark Joseph Mulrooney |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
82nd EAGE Annual Conference & Exhibition. |
| Popis: |
Summary Resolution and illumination issues in seismic data curtail identification of fault geometries and fault-initiated rock damages when mapping subsurface faults. Our goal is therefore to increase confidence in seismic interpretation of steep, normal faults by combining high-resolution seismic data and seismic modelling. The baseline case is from the Hoop area in the SW Barents Sea, covered by conventional and high-resolution P-Cable 3D seismic data. Seismic modelling is used to further test fault imaging. The seismic data were interpreted by several structural geologists and converging results from these interpretations were utilized to build a geo-model (geometry), which also include elastic parameters from well data (properties). Parameters required for the geological model include the overall fault geometry, host-rock lithofacies and the distribution of architectural elements (fault facies) within the fault zones. Misinterpretation of faults is reduced in the high-resolution dataset due to better imaging. The seismic modelling utilises a 2(3)D Point-Spread-Function based convolution approach applied to the input elastic model. A synthetic seismic modelling approach allows scenario-testing and comparison with observed faults in outcrop analogues. By combining datasets and approaches, typical pitfalls in seismic fault interpretation are highlighted, and viable fault geometries are better identified. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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