Thilo Bechstädt | Universität Heidelberg (original) (raw)

Papers by Thilo Bechstädt

Neues Jahrbuch für Geologie und Paläontologie - Monatshefte, 1984

Geologische Rundschau (1910. Print), Jun 1, 1989

In the paper by GANDIN et al. (1987) a paleogeographic model is presented, combining data from th... more In the paper by GANDIN et al. (1987) a paleogeographic model is presented, combining data from the Variscan nappes of eastern and central parts of Sardinia (working area of N. MINZONI) with data from the autochthonous Cambro-Ordovician sequences of southwestern Sardinia (working area of A. GANDIN & E COURJAULT-t~ADI~). An inner and an outer continental shelf is assumed for the

Revista de la Sociedad Geológica de España, 1994

espanolDos medios distintos de sedimentacion han sido reconocidos para los Miembros Inferior y Me... more espanolDos medios distintos de sedimentacion han sido reconocidos para los Miembros Inferior y Medio de la Formacion Vegadeo aflorantes entre el pueblo de Visuna y el puerto de Piedrafita do Caurel. Dentro del Miembro Inferior se han reconocido dos ooid shoal belts, depositados sucesivamente y separados por sedimentos siliciclasticos. En el segundo se ha encontrado un monticulo formado por caleimicrobios y arqueociatos. Estas barreras, depositadas en la zona marginal de una rampa o de una plataforma, indicarian la existencia de una cuenca hacia Galicia. La transicion entre rampa/ plataforma y la cuenca estaria representada por la falla de Vivero, probablemente ya activa en el Cambrico. Durante la deposicion del Miembro Medio la barrera oolitica progradaria en direccion Oeste, formandose en el area investigada un medio de sedimentacion de tipo tidal flat con frequentes apportes de grainstones desde la no muy lejana barrera. La ausencia de sedimentacion en esta zona del Miembro Superior de la Formacion Vegadeo indicaria un repentino hundimiento de la plataforma, relacionado con una fase de tectonica distensiva y un levantamiento eustatico del mar al principio del Cambrico Medio. Ejemplos de esta actividad tectono-eustatica son conocidos en todo el margen Norte del Gondwana. EnglishTwo different sedimentary environments have been recognized throughout the Vegadeo Formation outcropping between the Visuna village and the Piedrafita do Caurel pass. The Lower Mbr. of this Fm. is characterized by two different ooid shoal belts, separated by terrigenous inputs. The first belt can be followed from the village of Villarrubin to Visuna and the second belt, overlying the fonner, from Villarrubin until Piedrafita do Caurel pass. Sorne oncolitic-archeocyathan levels and a calcimicrobial- archeocyathan mound ha ve been found in the back of the ooid shoal, a more protected environment. These two ooid shoal belts, deposited in an externa! part of a distally steepened ramp, pass westward to a basin where the only sediments possibly consist of the Olio de Sapo Fm. The transition between the ramp environment and the basin is marked by the Vivero fault, possibly active already during the Cambrian. In the Visuna area a level of fossiliferous flaser Iimestones marks a local short termed relative subsidence of the shoal belt and terminales the lower member. Soon thereafter (Middle Mbr. of Vegadeo Fm.) the oolitic barrier progrades westwards and in the investigated area a sedimentation typical of tidal flats begins, characterized by microbial mats with birds eyes and pseudomorphs of sulphates. From time to time the typical tidal flat sedimentation is interrupted by the sudden input of reworked grainstones derived from the prograding batl'ier. Evidence of a clear drowning phase at the Middle Cambrian boundary, present in almost all of northern Gondwana, is given by fossiliferous, often echinoderm-rich nodular to flaser Iimestones. These sediments are also present elsewhere in the West Asturian-Leonese zone (= Upper Mbr. of the Vegado Fm.). In the area of investigation, shallow water sediments of the Vegadeo are immediately overlain by the probably deeper water siltstones and shales of the Los Cabos series. This is interpreted as being due to a local area of even stronger subsidence, caused by distinct tensional tectonics. The input of the incoming Los Cabos clastics was therefore attracted by this local depression.

In the Esla nappe, three major discontinuities have been recognized within the Lancara Formation.... more In the Esla nappe, three major discontinuities have been recognized within the Lancara Formation. Discontinuity D1 is located at the top o f the white bedded limestones. It is recognized as an erosive contact and marks a sharp change from a peritidal-dominant, homoclinal ramp to a ramp with oolitic and bioclastic shoals distinguished here as the grey lenticular limestones. Discontinuity D2 is placed at the top o f the grey lenticular limestones and is the boundary between the lower and upper Lancara members. A discontinuous ferruginous level or hard ground marks the boundary in the Esla nappe. Discontinuity D3 is placed at the bottom o f the griotte tectofacies. It marks a major tectonic pulse and the input o f fine-grained siliciclastics. In some areas, it is not sharp but gradual. D3 is a diachronous boundary, dated in some areas of the Cantabrian platform. The D3 surface is easily recognisable in SW Europe as a tectonically induced contact reflecting the diachronous and progressive breakdown o f some platforms in SW Europe.

Proceedings, 2013

Prediction and modelling of subsurface geothermal reservoir properties without knowledge of the d... more Prediction and modelling of subsurface geothermal reservoir properties without knowledge of the diagenesis are unconfident. Diagenesis controls both matrix porosity / permeability and mechanical rock properties by cementation and leaching processes. Simultaneously occurring with (brittle) deformation, diagenesis can also influence fracture formation. Here an integrated approach to the characterisation of geothermal reservoirs with focus on diagenesis is presented.

Petroleum Geoscience, Oct 26, 2018

The Upper Rhine Graben (URG), a classical hydrocarbon (HC) province, is part of the European Ceno... more The Upper Rhine Graben (URG), a classical hydrocarbon (HC) province, is part of the European Cenozoic Rift System. The rift graben development has led to a complex basin fill of terrestrial and marine Cenozoic deposits, providing several HC source and reservoir units. The aim of this study is the multidisciplinary analysis of the palaeoenvironmental conditions and source-rock development within the transgressive marine intervals, and the palaeothermal history of the graben system to improve the understanding of the HC system development. Palaeoenvironmental conditions are strongly influenced by rift-related tectonic activity. Transgressive marine intervals in times of major subsidence show high terrestrial input from the graben shoulders, leading to mainly terrigenous gas-prone kerogen, while transgressive marine intervals during weak tectonic activity are dominated by marine–brackish palaeoenvironments and oil-prone kerogen. This differs clearly from the previously suggested HC potential of these intervals. Thermal maturation analysis shows nearly constant maturation with depth, which is atypical for burial-controlled maturation. It indicates significant secondary thermal overprinting related to long-lasting very hot hydrothermal fluid systems, concentrated along fault zones. Therefore the development of the depositional setting, kerogen composition, thermal maturation and the HC potential is directly linked to the dynamics of the rift system development. Supplementary material: detailed results of all three wells are available at https://doi.org/10.6084/m9.figshare.c.4183106

The lead-zinc deposit of Bleiberg-Kreuth is hosted by carbonate rocks of Middle to Upper Triassic... more The lead-zinc deposit of Bleiberg-Kreuth is hosted by carbonate rocks of Middle to Upper Triassic (Ladinian/Carnian) age. There is a clear connection between palaeogeography (e.g. palaeotopographic highs within a lagoon) and ore emplacement. The sequence of carbonate cementation of the host rock gives good insight into the diagenetic processes and allows the relative dating of ore formation. Fluid inclusions from fluorite and carbonate cements indicate initial temperatures during ore emplacement from 80 up to 200°C, followed by a temperature increase up to 250°C during late burial diagenesis. Hydrothermal transport of metals and ore formation within a medium to deep burial environment are assumed.

American Association of Petroleum Geologists eBooks, 1983

International Journal of Rock Mechanics and Mining Sciences, Sep 1, 2018

This paper presents (1) an automated method to extract planes and their spatial orientation direc... more This paper presents (1) an automated method to extract planes and their spatial orientation directly from 3D point clouds, followed by (2) extensive validation tests accompanied by thorough statistical analysis, and (3) a fracture intensity calculation on automatically segmented planes. For the plane extraction, a region growing segmentation algorithm controlled by several input parameters is applied to a point cloud of a granite outcrop. Within its complex surface shape, more than 1000 compass measurements were conducted for validation. In addition, digitally handpicked planes in the software Virtual Reality Geological Studio (VRGS) were used for single plane comparison. In a second test site, we performed fracture intensity calculation in Petrel based on results of the segmentation algorithm on mechanical layers of a clastic sedimentary succession. The comparison of automated segmentation results and compass measurements of three different plane sets shows a deviation of 0.70-2.00°, while the mean single plane divergence amounts to 4.97°. Hence, this study presents a fast, precise, and highly adaptable automated plane detection method, which is reproducible, transparent, objective, and provides increased accuracy in outcrops with rough and complex surfaces. Moreover, output formats of spatial orientation and location of planes are designed for simple handling in other workflows and software.

Sedimentary Geology, Apr 1, 2004

The carbonates of the Lower Devonian La Vid Group in the Cantabrian Zone (NW-Spain) reveal distin... more The carbonates of the Lower Devonian La Vid Group in the Cantabrian Zone (NW-Spain) reveal distinct variations in lowfield magnetic susceptibility (MS) from base to top. There is good correlation between MS-variations and bulk Fe-content. A predominance of paramagnetic minerals (Fe-carbonate cements, pyrite, Fe-chlorite), mainly responsible for these MSvariations, is evidenced by optical methods, temperature-dependent MS-measurements and high-field magnetisation behaviour. These minerals are members of the diagenetic mineral assemblage formed during migration of a reducing Fe-bearing fluid. We interpret the variation in MS to reflect two stages of Fe-bearing mineral precipitation with an earlier Fe-carbonate and a later Fechlorite crystallisation; the latter restricted to interbedded carbonates and shales. Furthermore, porosity has an additional influence on the MS-signature, with high values in coarse-grained sandstones and carbonates, and lower values in fine-grained dolostones and limestones. This study highlights the influence of diagenetic mineral formation on MS-variations in carbonatebearing successions.

Neues Jahrbuch für Geologie und Paläontologie, Mar 30, 1984

The Late Eocene Sobrarbe Delta System developed at the southern margin of the Ainsa basin as part... more The Late Eocene Sobrarbe Delta System developed at the southern margin of the Ainsa basin as part of the Pyrenees foreland basin, northeastern Spain. It shows exceptional lateral and vertical exposure at seismic scale. Continuous outcrops between alluvial plain an basin margin in both time and space allow for high-resolution measuring/sampling of vertical sections and physical/optical tracing of sediment surfaces. This study includes preliminary data from three outcrop transects of 12-25 km each in the direction of long-term progradation and parallel to paleo-coastlines. The ongoing project will further develop and analyze a high-resolution 3D data set of reservoir architecture in the Sobrarbe Delta System with special focus on lateral continuity and vertical connectivity of reservoirs. Improved reservoir models are essential for forward numerical models of sedimentary systems and fluid-flow during subsequent burial. Key objective is the improved understanding of heterogeneities in reservoir facies and petrophysical parameters in foreland basin delta systems by high-resolution outcrop analysis. Outcrop-based data sets are processed with GIS (ArcGIS ®, ESRI 2009). 3D models will be performed and analyzed with Petrel ® (Schlumberger) and compared to producing subsurface delta systems in foreland basins.

Key objectives include sequence stratigraphy of the Devonian basin fill, numerical modeling and b... more Key objectives include sequence stratigraphy of the Devonian basin fill, numerical modeling and basin development during the Paleozoic to Mesozoic. Total thicknesses of the Paleozoic basin fill range between 4500-5500 m. Twelve stratigraphic intervals have been analysed from 2D seismic surveys and well data. Two major pan-African structural domains in the subsurface of the Reggane Basin significantly influenced the Paleozoic basin development: the West African Craton (WAC) and the Hoggar Block (HB). Moderate to high subsidence rates persisted during the Ordovician to Silurian. Subsidence rates slow down until Eifelian and accelerated again until the Devonian-Carboniferous boundary. Initial moderate to high subsidence rates in the early Carboniferous are followed by low subsidence in the late Carboniferous. Basin inversion started at approx. 200 Ma. Maximum paleotemperatures were reached at 250-240 Ma with approx. 200-220°C. Sediment pathways and dispersion widths outline a low-gradient transition from proximal upper shelf areas in the SE to outer shelf areas in the NW. Sediment flux varies strongly in time. The burial and exhumation model indicates, that the paleotemperature development was primarily controlled by regional burial, rather than by a Late Triassic heat flow event (related to Central Atlantic Magmatic Province).

Zeitschrift Der Deutschen Gesellschaft Fur Geowissenschaften, Nov 1, 2017

72nd EAGE Conference and Exhibition incorporating SPE EUROPEC 2010, 2010

The Campos, Santos and Pelotas basins (offshore southern Brazil) have been investigated in terms ... more The Campos, Santos and Pelotas basins (offshore southern Brazil) have been investigated in terms of 2D seismo-stratigraphy and numerical basin analysis. The processes controlling accommodation space evolution from the shelf top to the continental rise (i.e. eustacy, subsidence and sediment input) are discussed, and the evolution of the different basins is compared. Main results include: (i) classification of depositional seismic sequences from the syn-rift Barremian to the drift Holocene basin fill; (ii) numerical modeling of the subsidence/uplift history; (iii) forward stratigraphic simulation and quantification of erosion, transport and deposition rates regarding the basin-specific hydrocarbon potential

EAGE Research Workshop - From Seismic Interpretation to Stratigraphic and Basin Modelling, Present and Future, 2006

The sequence stratigraphic modelling study from the offshore Cenozoic Tarfaya basin located betwe... more The sequence stratigraphic modelling study from the offshore Cenozoic Tarfaya basin located between the Canary Islands and Morocco is mainly performed with seismic and well data in order to assess different possible exploration areas. Results of this study confirm the importance of rapid changes from uplift to subsidence on the Atlantic passive continental margin for the evolution of accommodation space in time. A tectonic active phase in the onshore part of the Aaiun-Tarfaya basin during the Eocene/Oligocene is witnessed by several hiatuses on the shelf and pronounced mass transport complexes in the basin. Seismic interpretation and numerical forward modelling indicate decreased preservation of sediments during these times, possibly because of a combination of multiple slumping and reduced sedimentary input into the system. Input data for sequence stratigraphic forward modelling are calibrated with sedimentary flux rates derived from a GIS-based analysis of the hinterland. The modelled sedimentation rates reflect the regional climatic and tectonic evolution during the Cenozoic in the study area. Especially after a turnover from greenhouse to icehouse conditions in Oligocene times (Seranne, 1999), an increased sedimentary input into the exploration area is observed in the seismic interpretation and verified within the course of sequence stratigraphic modelling.

Neues Jahrbuch für Geologie und Paläontologie - Monatshefte, 1984

Geologische Rundschau (1910. Print), Jun 1, 1989

In the paper by GANDIN et al. (1987) a paleogeographic model is presented, combining data from th... more In the paper by GANDIN et al. (1987) a paleogeographic model is presented, combining data from the Variscan nappes of eastern and central parts of Sardinia (working area of N. MINZONI) with data from the autochthonous Cambro-Ordovician sequences of southwestern Sardinia (working area of A. GANDIN & E COURJAULT-t~ADI~). An inner and an outer continental shelf is assumed for the

Revista de la Sociedad Geológica de España, 1994

espanolDos medios distintos de sedimentacion han sido reconocidos para los Miembros Inferior y Me... more espanolDos medios distintos de sedimentacion han sido reconocidos para los Miembros Inferior y Medio de la Formacion Vegadeo aflorantes entre el pueblo de Visuna y el puerto de Piedrafita do Caurel. Dentro del Miembro Inferior se han reconocido dos ooid shoal belts, depositados sucesivamente y separados por sedimentos siliciclasticos. En el segundo se ha encontrado un monticulo formado por caleimicrobios y arqueociatos. Estas barreras, depositadas en la zona marginal de una rampa o de una plataforma, indicarian la existencia de una cuenca hacia Galicia. La transicion entre rampa/ plataforma y la cuenca estaria representada por la falla de Vivero, probablemente ya activa en el Cambrico. Durante la deposicion del Miembro Medio la barrera oolitica progradaria en direccion Oeste, formandose en el area investigada un medio de sedimentacion de tipo tidal flat con frequentes apportes de grainstones desde la no muy lejana barrera. La ausencia de sedimentacion en esta zona del Miembro Superior de la Formacion Vegadeo indicaria un repentino hundimiento de la plataforma, relacionado con una fase de tectonica distensiva y un levantamiento eustatico del mar al principio del Cambrico Medio. Ejemplos de esta actividad tectono-eustatica son conocidos en todo el margen Norte del Gondwana. EnglishTwo different sedimentary environments have been recognized throughout the Vegadeo Formation outcropping between the Visuna village and the Piedrafita do Caurel pass. The Lower Mbr. of this Fm. is characterized by two different ooid shoal belts, separated by terrigenous inputs. The first belt can be followed from the village of Villarrubin to Visuna and the second belt, overlying the fonner, from Villarrubin until Piedrafita do Caurel pass. Sorne oncolitic-archeocyathan levels and a calcimicrobial- archeocyathan mound ha ve been found in the back of the ooid shoal, a more protected environment. These two ooid shoal belts, deposited in an externa! part of a distally steepened ramp, pass westward to a basin where the only sediments possibly consist of the Olio de Sapo Fm. The transition between the ramp environment and the basin is marked by the Vivero fault, possibly active already during the Cambrian. In the Visuna area a level of fossiliferous flaser Iimestones marks a local short termed relative subsidence of the shoal belt and terminales the lower member. Soon thereafter (Middle Mbr. of Vegadeo Fm.) the oolitic barrier progrades westwards and in the investigated area a sedimentation typical of tidal flats begins, characterized by microbial mats with birds eyes and pseudomorphs of sulphates. From time to time the typical tidal flat sedimentation is interrupted by the sudden input of reworked grainstones derived from the prograding batl'ier. Evidence of a clear drowning phase at the Middle Cambrian boundary, present in almost all of northern Gondwana, is given by fossiliferous, often echinoderm-rich nodular to flaser Iimestones. These sediments are also present elsewhere in the West Asturian-Leonese zone (= Upper Mbr. of the Vegado Fm.). In the area of investigation, shallow water sediments of the Vegadeo are immediately overlain by the probably deeper water siltstones and shales of the Los Cabos series. This is interpreted as being due to a local area of even stronger subsidence, caused by distinct tensional tectonics. The input of the incoming Los Cabos clastics was therefore attracted by this local depression.

In the Esla nappe, three major discontinuities have been recognized within the Lancara Formation.... more In the Esla nappe, three major discontinuities have been recognized within the Lancara Formation. Discontinuity D1 is located at the top o f the white bedded limestones. It is recognized as an erosive contact and marks a sharp change from a peritidal-dominant, homoclinal ramp to a ramp with oolitic and bioclastic shoals distinguished here as the grey lenticular limestones. Discontinuity D2 is placed at the top o f the grey lenticular limestones and is the boundary between the lower and upper Lancara members. A discontinuous ferruginous level or hard ground marks the boundary in the Esla nappe. Discontinuity D3 is placed at the bottom o f the griotte tectofacies. It marks a major tectonic pulse and the input o f fine-grained siliciclastics. In some areas, it is not sharp but gradual. D3 is a diachronous boundary, dated in some areas of the Cantabrian platform. The D3 surface is easily recognisable in SW Europe as a tectonically induced contact reflecting the diachronous and progressive breakdown o f some platforms in SW Europe.

Proceedings, 2013

Prediction and modelling of subsurface geothermal reservoir properties without knowledge of the d... more Prediction and modelling of subsurface geothermal reservoir properties without knowledge of the diagenesis are unconfident. Diagenesis controls both matrix porosity / permeability and mechanical rock properties by cementation and leaching processes. Simultaneously occurring with (brittle) deformation, diagenesis can also influence fracture formation. Here an integrated approach to the characterisation of geothermal reservoirs with focus on diagenesis is presented.

Petroleum Geoscience, Oct 26, 2018

The Upper Rhine Graben (URG), a classical hydrocarbon (HC) province, is part of the European Ceno... more The Upper Rhine Graben (URG), a classical hydrocarbon (HC) province, is part of the European Cenozoic Rift System. The rift graben development has led to a complex basin fill of terrestrial and marine Cenozoic deposits, providing several HC source and reservoir units. The aim of this study is the multidisciplinary analysis of the palaeoenvironmental conditions and source-rock development within the transgressive marine intervals, and the palaeothermal history of the graben system to improve the understanding of the HC system development. Palaeoenvironmental conditions are strongly influenced by rift-related tectonic activity. Transgressive marine intervals in times of major subsidence show high terrestrial input from the graben shoulders, leading to mainly terrigenous gas-prone kerogen, while transgressive marine intervals during weak tectonic activity are dominated by marine–brackish palaeoenvironments and oil-prone kerogen. This differs clearly from the previously suggested HC potential of these intervals. Thermal maturation analysis shows nearly constant maturation with depth, which is atypical for burial-controlled maturation. It indicates significant secondary thermal overprinting related to long-lasting very hot hydrothermal fluid systems, concentrated along fault zones. Therefore the development of the depositional setting, kerogen composition, thermal maturation and the HC potential is directly linked to the dynamics of the rift system development. Supplementary material: detailed results of all three wells are available at https://doi.org/10.6084/m9.figshare.c.4183106

The lead-zinc deposit of Bleiberg-Kreuth is hosted by carbonate rocks of Middle to Upper Triassic... more The lead-zinc deposit of Bleiberg-Kreuth is hosted by carbonate rocks of Middle to Upper Triassic (Ladinian/Carnian) age. There is a clear connection between palaeogeography (e.g. palaeotopographic highs within a lagoon) and ore emplacement. The sequence of carbonate cementation of the host rock gives good insight into the diagenetic processes and allows the relative dating of ore formation. Fluid inclusions from fluorite and carbonate cements indicate initial temperatures during ore emplacement from 80 up to 200°C, followed by a temperature increase up to 250°C during late burial diagenesis. Hydrothermal transport of metals and ore formation within a medium to deep burial environment are assumed.

American Association of Petroleum Geologists eBooks, 1983

International Journal of Rock Mechanics and Mining Sciences, Sep 1, 2018

This paper presents (1) an automated method to extract planes and their spatial orientation direc... more This paper presents (1) an automated method to extract planes and their spatial orientation directly from 3D point clouds, followed by (2) extensive validation tests accompanied by thorough statistical analysis, and (3) a fracture intensity calculation on automatically segmented planes. For the plane extraction, a region growing segmentation algorithm controlled by several input parameters is applied to a point cloud of a granite outcrop. Within its complex surface shape, more than 1000 compass measurements were conducted for validation. In addition, digitally handpicked planes in the software Virtual Reality Geological Studio (VRGS) were used for single plane comparison. In a second test site, we performed fracture intensity calculation in Petrel based on results of the segmentation algorithm on mechanical layers of a clastic sedimentary succession. The comparison of automated segmentation results and compass measurements of three different plane sets shows a deviation of 0.70-2.00°, while the mean single plane divergence amounts to 4.97°. Hence, this study presents a fast, precise, and highly adaptable automated plane detection method, which is reproducible, transparent, objective, and provides increased accuracy in outcrops with rough and complex surfaces. Moreover, output formats of spatial orientation and location of planes are designed for simple handling in other workflows and software.

Sedimentary Geology, Apr 1, 2004

The carbonates of the Lower Devonian La Vid Group in the Cantabrian Zone (NW-Spain) reveal distin... more The carbonates of the Lower Devonian La Vid Group in the Cantabrian Zone (NW-Spain) reveal distinct variations in lowfield magnetic susceptibility (MS) from base to top. There is good correlation between MS-variations and bulk Fe-content. A predominance of paramagnetic minerals (Fe-carbonate cements, pyrite, Fe-chlorite), mainly responsible for these MSvariations, is evidenced by optical methods, temperature-dependent MS-measurements and high-field magnetisation behaviour. These minerals are members of the diagenetic mineral assemblage formed during migration of a reducing Fe-bearing fluid. We interpret the variation in MS to reflect two stages of Fe-bearing mineral precipitation with an earlier Fe-carbonate and a later Fechlorite crystallisation; the latter restricted to interbedded carbonates and shales. Furthermore, porosity has an additional influence on the MS-signature, with high values in coarse-grained sandstones and carbonates, and lower values in fine-grained dolostones and limestones. This study highlights the influence of diagenetic mineral formation on MS-variations in carbonatebearing successions.

Neues Jahrbuch für Geologie und Paläontologie, Mar 30, 1984

The Late Eocene Sobrarbe Delta System developed at the southern margin of the Ainsa basin as part... more The Late Eocene Sobrarbe Delta System developed at the southern margin of the Ainsa basin as part of the Pyrenees foreland basin, northeastern Spain. It shows exceptional lateral and vertical exposure at seismic scale. Continuous outcrops between alluvial plain an basin margin in both time and space allow for high-resolution measuring/sampling of vertical sections and physical/optical tracing of sediment surfaces. This study includes preliminary data from three outcrop transects of 12-25 km each in the direction of long-term progradation and parallel to paleo-coastlines. The ongoing project will further develop and analyze a high-resolution 3D data set of reservoir architecture in the Sobrarbe Delta System with special focus on lateral continuity and vertical connectivity of reservoirs. Improved reservoir models are essential for forward numerical models of sedimentary systems and fluid-flow during subsequent burial. Key objective is the improved understanding of heterogeneities in reservoir facies and petrophysical parameters in foreland basin delta systems by high-resolution outcrop analysis. Outcrop-based data sets are processed with GIS (ArcGIS ®, ESRI 2009). 3D models will be performed and analyzed with Petrel ® (Schlumberger) and compared to producing subsurface delta systems in foreland basins.

Key objectives include sequence stratigraphy of the Devonian basin fill, numerical modeling and b... more Key objectives include sequence stratigraphy of the Devonian basin fill, numerical modeling and basin development during the Paleozoic to Mesozoic. Total thicknesses of the Paleozoic basin fill range between 4500-5500 m. Twelve stratigraphic intervals have been analysed from 2D seismic surveys and well data. Two major pan-African structural domains in the subsurface of the Reggane Basin significantly influenced the Paleozoic basin development: the West African Craton (WAC) and the Hoggar Block (HB). Moderate to high subsidence rates persisted during the Ordovician to Silurian. Subsidence rates slow down until Eifelian and accelerated again until the Devonian-Carboniferous boundary. Initial moderate to high subsidence rates in the early Carboniferous are followed by low subsidence in the late Carboniferous. Basin inversion started at approx. 200 Ma. Maximum paleotemperatures were reached at 250-240 Ma with approx. 200-220°C. Sediment pathways and dispersion widths outline a low-gradient transition from proximal upper shelf areas in the SE to outer shelf areas in the NW. Sediment flux varies strongly in time. The burial and exhumation model indicates, that the paleotemperature development was primarily controlled by regional burial, rather than by a Late Triassic heat flow event (related to Central Atlantic Magmatic Province).

Zeitschrift Der Deutschen Gesellschaft Fur Geowissenschaften, Nov 1, 2017

72nd EAGE Conference and Exhibition incorporating SPE EUROPEC 2010, 2010

The Campos, Santos and Pelotas basins (offshore southern Brazil) have been investigated in terms ... more The Campos, Santos and Pelotas basins (offshore southern Brazil) have been investigated in terms of 2D seismo-stratigraphy and numerical basin analysis. The processes controlling accommodation space evolution from the shelf top to the continental rise (i.e. eustacy, subsidence and sediment input) are discussed, and the evolution of the different basins is compared. Main results include: (i) classification of depositional seismic sequences from the syn-rift Barremian to the drift Holocene basin fill; (ii) numerical modeling of the subsidence/uplift history; (iii) forward stratigraphic simulation and quantification of erosion, transport and deposition rates regarding the basin-specific hydrocarbon potential

EAGE Research Workshop - From Seismic Interpretation to Stratigraphic and Basin Modelling, Present and Future, 2006

The sequence stratigraphic modelling study from the offshore Cenozoic Tarfaya basin located betwe... more The sequence stratigraphic modelling study from the offshore Cenozoic Tarfaya basin located between the Canary Islands and Morocco is mainly performed with seismic and well data in order to assess different possible exploration areas. Results of this study confirm the importance of rapid changes from uplift to subsidence on the Atlantic passive continental margin for the evolution of accommodation space in time. A tectonic active phase in the onshore part of the Aaiun-Tarfaya basin during the Eocene/Oligocene is witnessed by several hiatuses on the shelf and pronounced mass transport complexes in the basin. Seismic interpretation and numerical forward modelling indicate decreased preservation of sediments during these times, possibly because of a combination of multiple slumping and reduced sedimentary input into the system. Input data for sequence stratigraphic forward modelling are calibrated with sedimentary flux rates derived from a GIS-based analysis of the hinterland. The modelled sedimentation rates reflect the regional climatic and tectonic evolution during the Cenozoic in the study area. Especially after a turnover from greenhouse to icehouse conditions in Oligocene times (Seranne, 1999), an increased sedimentary input into the exploration area is observed in the seismic interpretation and verified within the course of sequence stratigraphic modelling.