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Publication
Sedimentological Reconstruction of the Campine Basin during the Dinantian
Book - Report
Abstract:The deep layers of the Dinantian have been relatively underexplored to date, while they represent the majority of the potential for all kinds of reservoir applications such as gas storage, geothermal energy and heat storage. The heterogeneity in these layers creates a lot of uncertainty and therefore a major exploration risk. Recently, new data and insights have been gathered from deep geothermal projects, through seismic research and deep drilling. However, until now, these new and old data had not yet been integrated.
This assignment aimed at a sedimentological analysis of the Dinantian in the Campine Basin and a palaeogeographical basin reconstruction, which could serve as guidance for the 3D geometric modeling of the respective layers. To achieve cross-fertilization between the structural modeling work and the sedimentological reconstruction, ad hoc consultation moments were provided during which insights were shared and discussed. In addition to integrating available data and scientific insights, new research was also conducted using the 'CycloLog' correlation software. Particular attention was paid to: (i) the possible presence of evaporites, (ii) the transition from Late Visean to Namurian, (iii) the significance of breccies and buildup structures, (iv) integration of new data, (v ) thickness variations and (vi) recent biostratigraphic insights. The main conclusions and recommendations for each research objective are as follows:
No clear evidence has been found for the presence of evaporites;
Build-ups seem to be most common in Tournaisian and Moliniacian. They are absent from the Livian and reappear in the lower Warnantian. The breccias were classified according to genesis.
Large thickness differences caused by differential subsidence - even with local sedimentary hiatuses - occur in both the Tournaisian and the upper Warnantian. Major syn-sedimentary fault activity appeared confined to the MFZ 15 interval.
The Visean to Namurian transition was influenced by tectonic activity together with a large relative sea level drop. As a result, the basin evolved into a complex pattern of high and low areas with different sedimentary facies. The northern edge showed an abrupt transition from shallow continental shelf to deep water, while the southern edge showed a more gradual transition. The Late Visean Goeree Formation is probably present in much of the area southwest of the largest carbonate shelf. The Early Namurian Souvré Formation was probably once present in most of the Campine Basin. The study was carried out by PanTerra Geoconsultants and was supervised by a broad steering group of sedimentological experts. This report contains the results of the literature study, the interpretations of studied geodata, the setting up of a stratigraphic framework, the analyses with CycloLog and the correlations with biostratigraphy, the preparation of basin-wide correlation sets with attention to thickness trends, the investigation of any presence of evaporites and paleosols, the final sedimentological analysis and integration, and finally the paleogeographic basin reconstruction with maps per time interval. Attached to the final report are a series of key figures (correlations and maps during the reconstruction), as well as a petrographic description of thin sections from the new drillings of the deep geothermal project in Beerse.
This assignment aimed at a sedimentological analysis of the Dinantian in the Campine Basin and a palaeogeographical basin reconstruction, which could serve as guidance for the 3D geometric modeling of the respective layers. To achieve cross-fertilization between the structural modeling work and the sedimentological reconstruction, ad hoc consultation moments were provided during which insights were shared and discussed. In addition to integrating available data and scientific insights, new research was also conducted using the 'CycloLog' correlation software. Particular attention was paid to: (i) the possible presence of evaporites, (ii) the transition from Late Visean to Namurian, (iii) the significance of breccies and buildup structures, (iv) integration of new data, (v ) thickness variations and (vi) recent biostratigraphic insights. The main conclusions and recommendations for each research objective are as follows:
No clear evidence has been found for the presence of evaporites;
Build-ups seem to be most common in Tournaisian and Moliniacian. They are absent from the Livian and reappear in the lower Warnantian. The breccias were classified according to genesis.
Large thickness differences caused by differential subsidence - even with local sedimentary hiatuses - occur in both the Tournaisian and the upper Warnantian. Major syn-sedimentary fault activity appeared confined to the MFZ 15 interval.
The Visean to Namurian transition was influenced by tectonic activity together with a large relative sea level drop. As a result, the basin evolved into a complex pattern of high and low areas with different sedimentary facies. The northern edge showed an abrupt transition from shallow continental shelf to deep water, while the southern edge showed a more gradual transition. The Late Visean Goeree Formation is probably present in much of the area southwest of the largest carbonate shelf. The Early Namurian Souvré Formation was probably once present in most of the Campine Basin. The study was carried out by PanTerra Geoconsultants and was supervised by a broad steering group of sedimentological experts. This report contains the results of the literature study, the interpretations of studied geodata, the setting up of a stratigraphic framework, the analyses with CycloLog and the correlations with biostratigraphy, the preparation of basin-wide correlation sets with attention to thickness trends, the investigation of any presence of evaporites and paleosols, the final sedimentological analysis and integration, and finally the paleogeographic basin reconstruction with maps per time interval. Attached to the final report are a series of key figures (correlations and maps during the reconstruction), as well as a petrographic description of thin sections from the new drillings of the deep geothermal project in Beerse.
Number of pages: 123
Publication year:2023
Keywords:Bekken van de Kempen, Dinantiaan
Accessibility:Open
Review status:Not peer-reviewed