Simulation of eroded oxbow lakes and conditioning to well data in reverse migration simulation of channelized systems.

Marion Parquer and Pauline Collon and Guillaume Caumon and Charles Vouaux. ( 2017 )
in: 2017 RING Meeting, pages 453--461, ASGA

Abstract

Sedimentary channelized systems result from a combination of continuous and discrete channel evolutive events whose understanding raise challenges when considering borehole data and seismic images. The abruptness of discrete events, such as oxbow lakes, strongly influence the lateral shift of the system. Such processes can be reproduced in a forward simulation approach. In a reverse migration simulation, integrating the abandoned meanders observed on subsurface images makes possible to reproduce the extension of the channelized system to the whole channel belt. The reverse approach, which starts from the last observed channel path and migrates it back in time while integrating step by step the paleo-geometries, relies on the preservation percentage of these structures. Only a few of them are spared by the reworking of the meander belt after their formation. In this paper, we propose to simulate eroded oxbow lakes inside the meander belt. Considering the geometrical and spatial characteristics of the observed oxbow lakes, paleo-channels are simulated for each time step of the reverse migration simulation. Conditioning to borehole data is performed by simulating an abandoned meander in the borehole area. According to the sedimentary context and to the observed facies, the geobody is simulated in order to condition the well as indicator of abandoned channel path or of lateral accretion point bars. Introduction

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BibTeX Reference

@INPROCEEDINGS{Parquer2017,
    author = { Parquer, Marion and Collon, Pauline and Caumon, Guillaume and Vouaux, Charles },
     title = { Simulation of eroded oxbow lakes and conditioning to well data in reverse migration simulation of channelized systems. },
 booktitle = { 2017 RING Meeting },
      year = { 2017 },
     pages = { 453--461 },
 publisher = { ASGA },
  abstract = { Sedimentary channelized systems result from a combination of continuous and discrete channel evolutive events whose understanding raise challenges when considering borehole data and seismic images. The abruptness of discrete events, such as oxbow lakes, strongly influence the lateral shift of the system. Such processes can be reproduced in a forward simulation approach. In a reverse migration simulation, integrating the abandoned meanders observed on subsurface images makes possible to reproduce the extension of the channelized system to the whole channel belt. The reverse approach, which starts from the last observed channel path and migrates it back in time while integrating step by step the paleo-geometries, relies on the preservation percentage of these structures. Only a few of them are spared by the reworking of the meander belt after their formation. In this paper, we propose to simulate eroded oxbow lakes inside the meander belt. Considering the geometrical and spatial characteristics of the observed oxbow lakes, paleo-channels are simulated for each time step of the reverse migration simulation. Conditioning to borehole data is performed by simulating an abandoned meander in the borehole area. According to the sedimentary context and to the observed facies, the geobody is simulated in order to condition the well as indicator of abandoned channel path or of lateral accretion point bars. Introduction }
}