Petroleum Reservoir Evaluation and Development

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Research progress of machine learning in CO2 enhanced oil and gas recovery and geological storage

YE HONGYING1, CAO CHENG1,2,3, ZHAO YULONG1, ZHANG LIEHUI1, ZHU HAONAN1, WEN SHAOMU4, LI QINGPING2, ZHANG DEPING5, ZHAO SONG6, CAO ZHENGLIN7   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500,China;
    2. Huairou Laboratory, Beijing 101400,China;
    3. Chongqing University Industrial Technology Research Institute, Chongqing 401331, China;
    4. PetroChina Southwest Oil Gas Field Company, Chengdu, Sichuan 610055, China;
    5. CCS-EOR Company, PetroChina Jilin Oil Field Company, Songyuan, Jilin 138000, China;
    6. Changqing Oilfield, Xi'an, Shaanxi 710018,China;
    7. Research Institute of Petroleum Exploration and Development; Beijing 101400,China
  • Received:2025-06-09

Abstract: Carbon Capture, Utilization, and Storage (CCUS) is a key technology for achieving carbon neutrality. It enables the dual benefits of increasing energy production and reducing CO2 emissions through CO2 enhanced oil and gas recovery (EOR/EGR) and geological storage. However, the large-scale application of CCUS technology faces technical challenges such as engineering design and risk assessment. Traditional solutions rely on empirical formulas, experimental verification, and physical models. When dealing with complex systems, these methods suffer from low computational efficiency, insufficient model accuracy, and difficulties in addressing multi-dimensional coupling issues.Machine Learning (ML), with its powerful data-driven analytical capabilities and adaptive optimization features, can train high-precision prediction models. It can optimize operating parameters, predict reservoir fluid behavior, assess leakage risks, and more, thereby enabling real-time monitoring and intelligent decision-making for complex systems and enhancing the safety and economic efficiency of CCUS technology.This study systematically reviews the applications of ML in CO2-enhanced oil and gas recovery and geological storage. In terms of CO2-enhanced oil and gas recovery, the applications cover seepage mechanism modeling, well pattern design optimization, production prediction and evaluation, multi-objective optimization, minimum miscibility pressure prediction, gas adsorption curve prediction, and CO2-CH4 diffusion assessment. In the aspect of CO2 geological storage, the applications include reservoir selection, research on CO2 dissolution and diffusion mechanisms, geological storage effect prediction, and risk assessment.Existing studies show that ML exhibits significant advantages in improving prediction accuracy, optimizing operating parameters, and enhancing computational efficiency. It has made important progress in key fields such as reservoir selection, gas adsorption prediction, and storage effect prediction. Nevertheless, improvements are still needed in terms of adaptability to complex geological scenarios, model universality, dynamic data processing capabilities, and physical interpretability.

Key words: machine learning, intelligent algorithm, CCUS (carbon capture, utilization and storage), enhanced oil and gas recovery, geological storage

CLC Number: 

  • TE357