Process-based Modelling of Sediment Distribution in Fluvial Crevasse Splays Validated by Outcrop Data

Axel Sanden, Rick Donselaar, Joep Storms, Koen van Toorenenburg, Helena van der Vegt, GJ Weltje

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientific

Abstract

Exploitation of unconventional resources could prolong the gas production in the North Sea. Low-net-to-gross fluvial intervals may have tough-gas reservoir potential in thin-bedded crevasse splays.To assess economic risks associated to the development of these reservoirs, a numerical model can help to predict the sediment distribution. To this end, simulations were conducted with Delft3D process-based modelling software. Input parameters and the validation data sets for these models are derived from outcrop studies in the present-day Río Colorado fluvial system in the Altiplano Basin, Bolivia. The grain-size trends of the simulated surface sediments for a single flood event show a trend which is consistent with the validation data. For example, grain-size decreases with increasing distance from the channel, which is in line with the physical concept of decreasing sediment size for decreasing flow energy. This shows that numerical models can be used to support sediment trends and depositional mechanisms of a crevasse splay. The combination of numerical models and discrete field data provides a solid case for sediment distribution predications. However, simulations still have a limited accuracy.
Original languageEnglish
Title of host publicationProceedings of the 2nd Conference on Forward Modelling of Sedimentary Systems
Subtitle of host publicationTrondheim, Norway
PublisherEAGE
Number of pages4
DOIs
Publication statusPublished - 2016
Event2nd Conference on Forward Modelling of Sedimentary Systems : From Desert to Deep Marine Depositional Systems - Thon Britannia, Trondheim, Norway
Duration: 25 Apr 201628 Apr 2016
Conference number: 2

Conference

Conference2nd Conference on Forward Modelling of Sedimentary Systems
CountryNorway
CityTrondheim
Period25/04/1628/04/16

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