Process-based Model Applied to Channelized Turbidite Systems: A Case Study of the Benin-major valley

Martin Lemay and Isabelle Cojan and Jacques Rivoirard and Jean-Louis Grimaud and Fabien Ors. ( 2018 )
in: 2018 Ring Meeting, ASGA

Abstract

Channelized turbidite systems are associated with extensive hydrocarbon reservoirs. Yet building realistic turbidite reservoir models is still a challenge. The process-based model Flumy has been firstly developed to simulate the long-term evolution of aggrading fluvial meandering systems in order to build 3D reservoir facies blocks. We take advantage of some similarities between the two environments to transpose Flumy to channelized turbidite systems by simulating the main processes at play in the submarine realm: channel lateral migration, avulsions, aggradation or flow stripping. Input parameters of Flumy mainly include the geometric characteristics of the observed deposits. Flumy builds a flow compatible with the channel geometry (Janocko et al., 2013). This flow is then used for the simulation of the processes that result in the deposition of the observed sedimentary bodies. Here the transposed Flumy is applied to the case study of the Benin-major valley (Deptuck et al., 2003, 2007). Flumy reproduces the geometry of the incisional valley by a smaller-scale channel, including both terraced meanders and early deposited outer levees. The model simulates a complex filling including laterally then vertically amalgamated channelized deposits in the lower and upper parts respectively. However, sand bodies are laterally extended but isolated in the lower part and vertically connected on the top. Flumy also reproduces inner levees that rise onto outer levees at the end of the filling phase. This study shows that Flumy reproduces realistic stratigraphic architecture and can be used to simulate channelized turbidite reservoirs.

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BibTeX Reference

@inproceedings{RUNKJRM74,
 abstract = { Channelized turbidite systems are associated with extensive hydrocarbon reservoirs. Yet building realistic turbidite reservoir models is still a challenge. The process-based model Flumy has been firstly developed to simulate the long-term evolution of aggrading fluvial meandering systems in order to build 3D reservoir facies blocks. We take advantage of some similarities between the two environments to transpose Flumy to channelized turbidite systems by simulating the main processes at play in the submarine realm: channel lateral migration, avulsions, aggradation or flow stripping. Input parameters of Flumy mainly include the geometric characteristics of the observed deposits. Flumy builds a flow compatible with the channel geometry (Janocko et al., 2013). This flow is then used for the simulation of the processes that result in the deposition of the observed sedimentary bodies.
Here the transposed Flumy is applied to the case study of the Benin-major valley (Deptuck et al., 2003, 2007). Flumy reproduces the geometry of the incisional valley by a smaller-scale channel, including both terraced meanders and early deposited outer levees. The model simulates a complex filling including laterally then vertically amalgamated channelized deposits in the lower and upper parts respectively. However, sand bodies are laterally extended but isolated in the lower part and vertically connected on the top. Flumy also reproduces inner levees that rise onto outer levees at the end of the filling phase.
This study shows that Flumy reproduces realistic stratigraphic architecture and can be used to simulate channelized turbidite reservoirs. },
 author = { Lemay, Martin AND Cojan, Isabelle AND Rivoirard, Jacques AND Grimaud, Jean-Louis AND Ors, Fabien },
 booktitle = { 2018 Ring Meeting },
 publisher = { ASGA },
 title = { Process-based Model Applied to Channelized Turbidite Systems: A Case Study of the Benin-major valley },
 year = { 2018 }
}