Investigating stratigraphic trapping potential in the forties formation, palaeocene, UK Central Graben.
- Authors
- Rodas Guerrero, Jos? Alberto
- Format
- MasterThesis
- Status
- publishedVersion
- Description
The Forties Formation is a prolific reservoir unit in the North Sea and has already been heavily explored. This project has been initiated to identify what type and size of reservoir architectures/elements are present in the Forties sequence and determine under which conditions associated stratigraphic trapping could result. Deposits of the Forties Sandstone filled-in the pre-existing topography at the end of the Lista Formation. The Forties sequence is formed by a long NW-SE axial fan with an approximate azimuth of 150? and a lateral fan sourced from the west, with an approximated azimuth of 100?. Gross thickness of the Forties interval is highly variable (0-500m). A detailed analysis was carried out in two different areas located approximately to the north and south-west of the Forties field. In this study, these areas are named North and South respectively. A combination of seismic attributes was used in order to identify the different architectural elements in the study area. Six elements were identified in the North: incised complex (sinuous), incised complex (linear), mass transport complex, sinuous leveed complex, distributary channel complex and crevasse splay. Architectural elements in the North are characterized by sediments deposited in a channelized proximal area of the Forties fan. Architectural elements in the South are located closer to the slope and are dominated by two main architectural elements: low-sinuosity channel complex and high-gradient linear systems. The final result is a conceptual model indicating areas where associated stratigraphic trapping could result. The model includes five types of stratigraphic traps proposed for both the North and South area: channel truncation, lateral pinch-out, channel bends and pinch-out gainst topographic highs, channel fill and shale drapes. Since the results of this study are mostly based on seismic interpretation and analysis, it is recommended to test and update the model using core data. Finally, it is also recommended to test the stratigraphic trapping concepts proposed using different seismic volumes and perform more advanced seismic techniques like seismic inversion in order to improve reservoir characterization below seismic scale.
El presente estudio fue iniciado con el objetivo de identicar qu? tipo y tama?o de elementos y arquitectura sedimentaria est?n presentes en la secuencia Forties adem?s de determinar en qu? condiciones estos podr?an constituir potenciales trampas estratigr?ficas.
- Publication Year
- 2014
- Language
- eng
- Topic
- GEOF?SICA
GEOLOG?A
INTERPRETACI?N S?SMICA
AN?LISIS DE ATRIBUTOS S?SMICOS
- Repository
- Repositorio SENESCYT
- Rights
- openAccess
- License