Effect of CO 2 /Brine/Shale Interaction on Shale Water Wettability and Spontaneous Imbibition
Rattachement africain : cn, cz. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Wettability and spontaneous imbibition characteristics play pivotal roles in fluid distribution and migration within reservoirs, profoundly impacting shale oil and gas extraction as well as methane and CO 2 occurrence in pore systems and the selection and recovery of fracturing fluids. In this study, Yanchang shale in the Ordos Basin underwent investigation, focusing on ScCO 2 –brine–rock interactions under varied pressures. X-ray diffraction, low-temperature N 2 adsorption, spontaneous imbibition, and contact angle tests were employed to analyze changes in the shale wettability and pore structure pre- and post-ScCO 2 exposure. The results indicate significant alterations post-CO 2 –brine–rock interactions: dissolution of carbonate and select clay minerals, alongside reductions in the shale pore volume (PV), and specific surface area. Expansion of clay mineral water absorption predominantly contributes to PV decreases. The interaction’s effects yield differing mass accretions: M dodecane > M brine > M distilled water. These changes mitigate water-blocking reactions, enhancing fluid migration and thereby boosting shale gas recovery rates. However, escalating CO 2 pressures correlate with heightened shale imbibition masses, potentially diminishing the fracturing fluid recovery efficiency. Furthermore, diminished shale water wettability reduces capillary forces, hindering the CO 2 geological storage feasibility. This research underscores foundational insights into advancing integrated CO 2 -enhanced shale gas extraction and geological storage projects in the Ordos Basin.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé, mais le titre doit être comparé manuellement.
- Titre Crossref
- Effect of CO <sub>2</sub> /Brine/Shale Interaction on Shale Water Wettability and Spontaneous Imbibition
- Date Crossref
- 28/10/2024
- Éditeur
- American Chemical Society (ACS)
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Chongqing University State Key Laboratory of Coal Mine Disaster Dynamics and Control pays non établi dans la noticeUniversité ou école supérieure
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RS Dynamics (Czechia) pays non établi dans la noticeEntreprise
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State Key Laboratory of Coal Mine Disaster Dynamics and Control pays non établi dans la noticeStructure de recherche
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PetroChina Southwest Oil and Gas Field Company (China) pays non établi dans la noticeEntreprise
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School of Resoures and Safety Engineering pays non établi dans la noticeUniversité ou école supérieure
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State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seam pays non établi dans la noticeStructure de recherche
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Petro China Southwest Oil and Gas Field Company pays non établi dans la noticeEntreprise
State Key Laboratory of Coal Mine Disaster Dynamics and Control — Chongqing University, RS Dynamics (Czechia) et State Key Laboratory of Coal Mine Disaster Dynamics and Control, avec 4 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.