Controls upon hydrocarbon reservoir evolution within the Rotliegende group: A fully integrated regional study
- Univ. of Liverpool (United Kingdom)
- Univ. of Keele (United Kingdom)
The collection of a large database, in conjunction with new understandings of sedimentology and structural controls upon diagenesis, has enabled the detailed mapping of the factors that control the distribution of hydrocarbon reservoirs within the Rotliegende Group of the United Kingdom southern North Sea. The results of this regional study incorporate detail previously confined to field scale studies. High resolution sedimentological and stratigraphic studies (4 km of core) have resulted in a twelve-fold subdivision of the Rotliegende Group based upon the recognition of climatically driven depositional cycles. These illustrate a progressive basin expansion controlled by the distribution of buried lower Paleozoic granites and post-Vanscan topography. This model incorporated with mapping of facies distribution has been used to document the distribution of potential reservoir rocks. Detailed diagenetic work has documented the distribution of all the principal mineral phases within the basin. Integration with structural studies has revealed the role of the fractures for introducing fluids to, and compartmentalizing reservoirs has led to significant understanding of the source and transport mechanism for the pore-occluding diagenetic phases. Regionally, an understanding of burial and inversion events has demonstrated that the distribution of clays, particularly permeability destroying illite, is controlled by both burial depth and source of reactants. Combination of sedimentological and diagenetic aspects has enabled the production predictive maps for the area. This, combined with the structural work, has highlighted the importance of timing of hydrocarbon migration in relation to reservoir structuration, particularly in areas away from the main Sole Pit source kitchen.
- OSTI ID:
- 6851614
- Report Number(s):
- CONF-9310237-; CODEN: AABUD2
- Journal Information:
- AAPG Bulletin (American Association of Petroleum Geologists); (United States), Vol. 77:9; Conference: American Association of Petroleum Geologists (AAPG) mid-continent section meeting, Amarillo, TX (United States), 10-12 Oct 1993; ISSN 0149-1423
- Country of Publication:
- United States
- Language:
- English
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03 NATURAL GAS
HYDROCARBONS
MIGRATION
RESERVOIR ROCK
DIAGENESIS
SEDIMENTARY BASINS
MAPPING
UNITED KINGDOM
GEOLOGIC STRUCTURES
DISTRIBUTION
GEOLOGIC FRACTURES
GEOLOGIC MODELS
GEOMORPHOLOGY
NORTH SEA
PERMEABILITY
PERMIAN PERIOD
STRATIGRAPHY
TOPOGRAPHY
ATLANTIC OCEAN
DEVELOPED COUNTRIES
EUROPE
GEOLOGIC AGES
GEOLOGY
ORGANIC COMPOUNDS
PALEOZOIC ERA
SEAS
SURFACE WATERS
WESTERN EUROPE
020200* - Petroleum- Reserves
Geology
& Exploration
030200 - Natural Gas- Reserves
Geology
& Exploration