How to preserve the architectural elements of channelized systems in flow simulation using conventional corner-point grids

Enrico Scarpa and Pauline Collon and Guillaume Caumon. ( 2020 )
in: 2020 RING Meeting, ASGA

Abstract

Some studies have demonstrated that the interplay between erosional and depositional processes occurring in channelized environments generate a variety of static connectivity patterns between sedimentary packages. To evaluate the impact of this variability on underground fluid circulations, flow simulations are required. These simulations should be performed in numerical representations which preserve the main sedimentary heterogeneities. The scope of the present work is to establish a workflow approach to perform flow simulation in channelized systems. The first step consists in defining a set of lines, figuring the backbone of a channel, which can be created by various forward or reverse channel migration simulation algorithms. Each line stores the width, the height and the relative age of the channel. Non Uniform Rational Basis Splines, known as NURBS, are then used to build the channel basal envelope. This basal surface is then extended to the complete domain of interest in order to emulate the isochron depositional surfaces. In a second step," we estimate the vertical migration of each depth point along the isochron surface to estimate the potential erosive action of a younger channel. The resulting set of successive depositional surfaces is finally used to generate a global 3D corner-point stratigraphic grid of the channelized system. The workflow would thus enable us to explore the impact of various static connectivity patterns on the dynamic flow response.

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    BibTeX Reference

    @INPROCEEDINGS{SCARPA_RM2020,
        author = { Scarpa, Enrico and Collon, Pauline and Caumon, Guillaume },
         title = { How to preserve the architectural elements of channelized systems in flow simulation using conventional corner-point grids },
     booktitle = { 2020 RING Meeting },
          year = { 2020 },
     publisher = { ASGA },
      abstract = { Some studies have demonstrated that the interplay between erosional and depositional processes occurring in channelized environments generate a variety of static connectivity patterns between sedimentary packages. To evaluate the impact of this variability on underground fluid circulations, flow simulations are required. These simulations should be performed in numerical representations which preserve the main sedimentary heterogeneities. The scope of the present work is to establish a workflow approach to perform flow simulation in channelized systems. The first step consists in defining a set of lines, figuring the backbone of a channel, which can be created by various forward or reverse channel migration simulation algorithms. Each line stores the width, the height and the relative age of the channel. Non Uniform Rational Basis Splines, known as NURBS, are then used to build the channel basal envelope. This basal surface is then extended to the complete domain of interest in order to emulate the isochron depositional surfaces. In a second step," we estimate the vertical migration of each depth point along the isochron surface to estimate the potential erosive action of a younger channel. The resulting set of successive depositional surfaces is finally used to generate a global 3D corner-point stratigraphic grid of the channelized system. The workflow would thus enable us to explore the impact of various static connectivity patterns on the dynamic flow response. }
    }