CCUS-EORプロセスにおける粘土鉱物誘発の標的型堆積と相乗的なCO2収束の可能性のメカニズム
Miaoxin Zhang1, Jingchun Wu1, Liyuan Cai1
1Key Laboratory for EOR Technology (Ministry of Education), Northeast Petroleum University, Daqing, China.
PloS one
|September 5, 2025
まとめ
粘土鉱物は,二酸化炭素 (CO2) 誘発による石油貯水池におけるアスファルトンの堆積を大幅に増加させます. このプロセスは,より小さな孔で二酸化炭素を吸収し,石油回収と長期の炭素貯蔵の安定性をバランスとします.
科学分野:
- 石油工学
- 地化学
- 環境科学
背景:
- 粘土の濃度が高い水に敏感な貯水池は,粘土の膨らみと不十分な浸透により開発に課題があります.
- 二酸化炭素 (CO2) の注入は,石油回収 (EOR) と炭素収縮の強化の可能性を提供します.
- CO2によるアスファルトンの堆積と収縮に対する粘土鉱物の影響は十分に理解されていません.
研究 の 目的:
- CO2誘発アスファルトンの堆積を調節する粘土鉱物の役割を調査する.
- 石油貯蔵庫における二酸化炭素収縮効率に対する粘土の影響を評価する.
- 粘土,アスファルトンの堆積,CO2の注入が貯水池の特性とEORに与える影響を評価する.
主な方法:
- 粘土と石油の相互作用と原油の性質の実験分析
- 孔の遮断の微細分析のための核磁気共鳴 (NMR).
- 貯水池の条件をシミュレートし,CO2の収縮を測定するための長いコア浸水試験.
主要な成果:
- 粘土鉱物は,CO2誘発アスファルトンの堆積を最大37%増加させます.
- 粘土の含有量が増加すると,原油-CO2間の張力と粘度が低下し,注入性が改善されます.
- 粘土とアスファルトンはより大きな毛穴を遮断し,貯水池の異質性を高め,CO2をより小さな毛穴に誘導します.
結論:
- 高い粘土含有量は CO2 の効率的な封じ込めに不可欠です.
- 粘土の含有量によって二酸化炭素の吸収率が上昇し,粘土が多いシステムでは48.21%に達する.
- アスファルトンの堆積は,透過性に影響を及ぼしながら,CO2の分布を最適化し,封じ込めと安定した長期貯蔵を可能にします.
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