Impact of uncertainties in rock mechanical properties on subsidence evaluation

Tianmeng Hu and Frédérique Fournier and Jean-Jacques Royer and C. Joseph. ( 2006 )
in: International Association for Mathematical Geosciences 10th Annual Conference, IAMG

Abstract

A methodology based on embedded stochastic simulations is proposed to propagate the large uncertainties usually attached to the rock mechanical properties down to the evaluation of the subsidence risk. First, the uncertainties on the lithology are accounted for through sequential indicator simulations. Second, the rock mechanical properties are simulated conditionally to the previously generated lithologies, after careful calibration of rock mechanical property distributions from log and core data. Finally, the mechanical computation is performed for each stochastic realization: it is based on a simplified 1D poroelastic model under oedometric conditions, since it provides conservative results. The methodology is demonstrated on a specific field for which it is shown that the subsidence evaluation is mainly impacted by the uncertainties on the lithology within the reservoir.

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BibTeX Reference

@inproceedings{hu:hal-04062202,
 abstract = {A methodology based on embedded stochastic simulations is proposed to propagate the large uncertainties usually attached to the rock mechanical properties down to the evaluation of the subsidence risk. First, the uncertainties on the lithology are accounted for through sequential indicator simulations. Second, the rock mechanical properties are simulated conditionally to the previously generated lithologies, after careful calibration of rock mechanical property distributions from log and core data. Finally, the mechanical computation is performed for each stochastic realization: it is based on a simplified 1D poroelastic model under oedometric conditions, since it provides conservative results. The methodology is demonstrated on a specific field for which it is shown that the subsidence evaluation is mainly impacted by the uncertainties on the lithology within the reservoir.},
 address = {Li{\`e}ge (Belgique), Belgium},
 author = {Hu, Tianmeng and Fournier, Fr{\'e}d{\'e}rique and Royer, Jean-Jacques and Joseph, C.},
 booktitle = {{International Association for Mathematical Geosciences 10th Annual Conference}},
 hal_id = {hal-04062202},
 hal_version = {v1},
 keywords = {subsidence evaluation ; rock mechanical properties ; uncertainties ; stochastic simulations},
 organization = {{IAMG}},
 title = {{Impact of uncertainties in rock mechanical properties on subsidence evaluation}},
 url = {https://hal.univ-lorraine.fr/hal-04062202},
 year = {2006}
}