*Result*: Differentiable multiphase flow model for physics-informed machine learning in reservoir pressure management.

Title:
Differentiable multiphase flow model for physics-informed machine learning in reservoir pressure management.
Authors:
Ur Rashid H; Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA. hrashid@lanl.gov., Pachalieva A; Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA., O'Malley D; Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA.
Source:
Scientific reports [Sci Rep] 2026 Feb 24. Date of Electronic Publication: 2026 Feb 24.
Publication Model:
Ahead of Print
Publication Type:
Journal Article
Language:
English
Journal Info:
Publisher: Nature Publishing Group Country of Publication: England NLM ID: 101563288 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 2045-2322 (Electronic) Linking ISSN: 20452322 NLM ISO Abbreviation: Sci Rep Subsets: MEDLINE
Imprint Name(s):
Original Publication: London : Nature Publishing Group, copyright 2011-
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Grant Information:
DE-SC0024721 U.S. Department of Energy,United States
Entry Date(s):
Date Created: 20260223 Latest Revision: 20260223
Update Code:
20260224
DOI:
10.1038/s41598-026-37063-3
PMID:
41730933
Database:
MEDLINE

*Further Information*

*Accurate subsurface reservoir pressure control is extremely challenging due to geological heterogeneity and multiphase fluid-flow dynamics. Predicting behavior in this setting relies on high-fidelity physics-based simulations that are computationally expensive. Yet, the uncertain, heterogeneous properties that control these flows make it necessary to perform many of these expensive simulations, which is often prohibitive. To address these challenges, we introduce a physics-informed machine learning workflow that couples a fully differentiable multiphase flow simulator, which is implemented in the DPFEHM framework with a convolutional neural network (CNN). The CNN learns to predict fluid extraction rates from heterogeneous permeability fields to enforce pressure limits at critical reservoir locations. By incorporating transient multiphase flow physics into the training process, our method enables more practical and accurate predictions for realistic injection-extraction scenarios compared to previous works. To speed up training, we pretrain the model on single-phase, steady-state simulations and then finetune it on full multiphase scenarios, which dramatically reduces the computational cost. We demonstrate that high-accuracy training can be achieved with fewer than three thousand full-physics multiphase flow simulations - compared to previous estimates requiring up to ten million. This drastic reduction in the number of simulations is achieved by leveraging transfer learning from much less expensive single phase simulations.
(© 2026. This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply.)*

*Declarations. Competing interests: The authors declare no competing interests.*