NDLI: Managing Uncertainty in Geological $CO_{2}$ Storage Using Bayesian Evidential Learning

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Managing Uncertainty in Geological $CO_{2}$ Storage Using Bayesian Evidential Learning

Content Provider	MDPI
Author	Tadjer, Amine Bratvold, Reidar
Copyright Year	2021
Abstract	Carbon capture and storage (CCS) has been increasingly looking like a promising strategy to reduce ${CO}_{2}$ emissions and meet the Paris agreement’s climate target. To ensure that CCS is safe and successful, an efficient monitoring program that will prevent storage reservoir leakage and drinking water contamination in groundwater aquifers must be implemented. However, geologic ${CO}_{2}$ sequestration (GCS) sites are not completely certain about the geological properties, which makes it difficult to predict the behavior of the injected gases, ${CO}_{2}$ brine leakage rates through wellbores, and ${CO}_{2}$ plume migration. Significant effort is required to observe how ${CO}_{2}$ behaves in reservoirs. A key question is: Will the ${CO}_{2}$ injection and storage behave as expected, and can we anticipate leakages? History matching of reservoir models can mitigate uncertainty towards a predictive strategy. It could prove challenging to develop a set of history matching models that preserve geological realism. A new Bayesian evidential learning (BEL) protocol for uncertainty quantification was released through literature, as an alternative to the model-space inversion in the history-matching approach. Consequently, an ensemble of previous geological models was developed using a prior distribution’s Monte Carlo simulation, followed by direct forecasting (DF) for joint uncertainty quantification. The goal of this work is to use prior models to identify a statistical relationship between data prediction, ensemble models, and data variables, without any explicit model inversion. The paper also introduces a new DF implementation using an ensemble smoother and shows that the new implementation can make the computation more robust than the standard method. The Utsira saline aquifer west of Norway is used to exemplify BEL’s ability to predict the ${CO}_{2}$ mass and leakages and improve decision support regarding ${CO}_{2}$ storage projects.
Starting Page	1557
e-ISSN	19961073
DOI	10.3390/en14061557
Journal	Energies
Issue Number	6
Volume Number	14
Language	English
Publisher	MDPI
Publisher Date	2021-03-11
Access Restriction	Open
Subject Keyword	Energies Petroleum Engineering Uncertainty Quantification Carbon Storage Bayesian Evidential Learning Data Assimilation
Content Type	Text
Resource Type	Article

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