A holistic view on avulsion dynamics in a dryland river fan based on comprehensive geomorphological analysis

Dryland river fans form by repeated switching (avulsion) of an ephemeral stream as it progrades and accumulates sediment onto a low-gradient alluvial plain. Successive channel belts are organised in a radial pattern through a process of compensational stacking, where each consecutive river path avoids the positive relief left by its predecessors...

Spatio-temporal reconstruction of avulsion history at the terminus of a modern dryland river system

Fluvial depositional architecture in an unconfined environment is governed by sediment dispersal across the alluvial plain through river-path switching by avulsion. Documented inter-avulsion periodicity from modern rivers ranges from tens to over a thousand years. In this study, a quantitative spatio-temporal reconstruction of avulsion...

The key role of crevasse splays in prograding river systems: Analysis of evolving floodplain accommodation and its implications for architecture and reservoir potential

A generic life cycle applies to crevasse splays in non-degradational fluvial systems, typically ending in healing and abandonment. Crevasse-splay channels adjust to a graded equilibrium profile through proximal erosion and distal deposition, with their distal termini acting as a (prograding) local base level. When proximal incision advances to...

Self-organizing avulsions in an endorheic dryland river system

On the origin of crevasse-splay amalgamation in the Huesca fluvial fan (Ebro Basin, Spain): Implications for connectivity in low net-to-gross fluvial deposits

Floodplain deposits are abundant in low-gradient dryland river systems, but their contribution to connected reservoir volumes has not yet been fully acknowledged due to their poor detectability with typical wireline log suites and relatively-lower reservoir quality. This study presents an analysis of stacked crevasse splays in the distal part of...

On the origin of crevasse-splay amalgamation in the Huesca fluvial fan (Ebro Basin, Spain): Implications for connectivity in low net-to-gross fluvial deposits

Floodplain deposits are abundant in low-gradient dryland river systems, but their contribution to connected reservoir volumes has not yet been fully acknowledged due to their poor detectability with typical wireline log suites and relatively-lower reservoir quality. This study presents an analysis of stacked crevasse splays in the distal part of...

Reservoir potential of thin-bedded sandstone in continental mudrock successions - The search for hidden treasures

The subsurface of the West European gas province contains up to several hundred meters thick continuous Upper Rotliegend and Lower Triassic mud rock sequences which have to date been labelled as nonreservoir ‘waste zone’. The mud rock formed as fluvial floodplain deposits in a semi-arid climate. The sequences contain thin-bedded porous and...

Reservoir architecture and tough gas reservoir potential of fluvial crevasse-splay deposits

Unconventional tough gas reservoirs in low-net-to-gross fluvial stratigraphic intervals may constitute a secondary source of fossil energy to prolong the gas supply in the future. To date, however, production from these thin-bedded, fine-grained reservoirs has been hampered by the economic risks associated with the uncertainties in their...

Evaluation of the CO2-storage potential in depleted gas fields of the West Netherlands Basin: Case study P18 gas field

Characterizing thin-bedded, low-N/G tough gas reservoirs through reservoir-analogue and core studies

Identification and evaluation of CCS sweet spots in the West Netherlands Basin

Carbon Capture and Sequestration (CCS) is expected to become a serious CO2-emission reduction technology in the Netherlands, for example in the mature West Netherlands Basin (WNB). This study aims to identify and evaluate potential CO2-storage reservoirs based on geological boundary conditions. These criteria are applied to a basin-scale...

Identification and evaluation of CCS sweet spots in the West Netherlands Basin