• Bokmål
  • English

Nettstedskart

Modeling facies from process models

Modeling facies from process models

In this project we investigate how synthetic deposits generated by process-based models can be utilized in classical facies modeling workflows. Synthetic deposits are numerical analogues of geological deposits, generated by solving physical equations for sediment transport and fluid motion. We work in a shallow marine depositional setting, where a feeder channel delivers sediment to a basin with limited marine reworking under constant sea level. This leads to the development of prograding deltas with various geometries depending on input variables such as sediment properties, basin slope and hydrodynamics.  We established a workflow to transfer the modelled data into the reservoir modeling framework, where we can extract information relevant for facies models.
 
The main focus has been on the Multipoint facies simulation algorithm, also known as SNESIM or MPS. This method requires training images representing the geological pattern to be simulated, and the key idea is that to use the output from the process models as input.
 
The synthetic delta models contain a lot of information, such as fluid velocities, sorting, grain size distribution and depositional history. However, they do not come with a discrete facies classification, and we have explored some solutions to this.
 
Once a classification is established, we use the facies pattern as training images in the SNESIM algorithm. We have extended the SNESIM algorithm to accept multiple training images to investigate the effect of using one versus multiple process-based models as input. Automated procedures have been developed to support this workflow. The results are evaluated based on a developed QC tool, which allows for visual and quantified pattern recognition.
 

Images

Process models delta river
Multipoint MPS simulations from process model training images

Publications

Aarnes, Ingrid; Fjellvoll, Bjørn and Hauge, RagnarUtilizing process-based models in facies modelling workflows. Report: SAND/08/2017.

Ingrid Aarnes, Bjørn Fjellvoll, Helena Van Der Vegt and Kjetil NordahlUsing sedimentary process models to assist reservoir facies modeling. NPF Reservoir Characterization December 2017. Conference presentation.

 

Project period

November 2016 - December 2017
Department

Financing

Statoil ASA.

Partners

Statoil ASA.

Deltares

TUDelft

Postadresse:
Norsk Regnesentral
Postboks 114 Blindern
0314 Oslo
Besøksadresse:
Norsk Regnesentral
Gaustadalleen 23a
Kristen Nygaards hus
0373 Oslo
Tlf:
(+47) 22 85 25 00
Adresse Hvordan komme til NR
Sosiale media Del på sosiale media
Personvernerklæring Personvernerklæring
Postadresse: Norsk Regnesentral, Postboks 114 Blindern, 0314 Oslo
Besøksadresse: Norsk Regnesentral, Gaustadalleen 23a, Kristen Nygaards hus, 0373 Oslo
Tlf: (+47) 22 85 25 00
AdresseHvordan komme til NR