Conditioning 3D channel reverse migration to borehole data

Arnaud Cayrol and Pauline Collon and Marion Parquer and Guillaume Caumon. ( 2019 )
in: 2019 Ring Meeting, ASGA

Abstract

This paper describes a follow-up on the reverse migration method for channels, which aims at reconstructing the 3D architecture of the sedimentary record of channelized systems. We propose a method for simulating abandoned meanders in order to condition the channelized system reconstruction to borehole data. By forcing an abandoned loop to pass exactly through a borehole data, we can condition shale plug facies. Point bar facies are conditioned by creating an abandoned loop around the data point at a younger stage of the natural migration. The reverse migration is then in uenced to cross the data point at a younger stage. We also condition flood plain or crevasse splay facies data points by exercising a repulsion force on the channel migration. The proposed method is tested on multiple configurations to evaluate its robustness. Some base parameter values for the simulation are also inferred from the tests. In particular, a predetermined amount of abandoned loops are stochastically generated to maintain the channel sinuosity through time. This is done in a way to prioritize pre-existing data while accounting for the the effects of limited data quality and the potential erosion of cut-off loops.

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BibTeX Reference

@INPROCEEDINGS{CayrolRM2019,
    author = { Cayrol, Arnaud and Collon, Pauline and Parquer, Marion and Caumon, Guillaume },
     title = { Conditioning 3D channel reverse migration to borehole data },
 booktitle = { 2019 Ring Meeting },
      year = { 2019 },
 publisher = { ASGA },
  abstract = { This paper describes a follow-up on the reverse migration method for channels, which aims at reconstructing the 3D architecture of the sedimentary record of channelized systems. We propose a method for simulating abandoned meanders in order to condition the channelized system reconstruction to borehole data. By forcing an abandoned loop to pass exactly through a borehole data, we can condition shale plug facies. Point bar facies are conditioned by creating an abandoned loop around the data point at a younger stage of the natural migration. The reverse migration is then in uenced to cross the data point at a younger stage. We also condition flood plain or crevasse splay facies data points by exercising a repulsion force on the channel migration. The proposed method is tested on multiple configurations to evaluate its robustness. Some base parameter values for the simulation are also inferred from the tests. In particular, a predetermined amount of abandoned loops are stochastically generated to maintain the channel sinuosity through time. This is done in a way to prioritize pre-existing data while accounting for the the effects of limited data quality and the potential erosion of cut-off loops. }
}