Composite temporary plugging mechanism in horizontal well perforations
Rattachement africain : cn, us. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
In multi-stage fracturing of horizontal wells, fracture-opening temporary plugging is crucial in ensuring the uniform propagation of hydraulic fractures. Large-displacement, high-intensity sanding fracturing often causes severe perforation erosion, which in turn affects the performance of plugging. A composite temporary plugging method that combines ball-sealers and temporary plugging agents (TPAs) is commonly used to enhance the plugging efficiency. However, due to the size disparity between them, conventional numerical simulation methods face challenges in modeling such cross-scale particle systems. To address this issue, a hybrid computational fluid dynamics-discrete element method model was developed using the fictitious domain method and statistical kernel functions. This model was employed to study the formation and evolution of composite temporary plugging at perforations under varying conditions. The results indicate that intense axial acceleration in the upstream inhibits particle bridging, whereas reduced velocity and vortex formation downstream create favorable conditions for plug formation. During the plugging process, a perforation plugging forms only when the concentration of TPAs exceeds a critical threshold. This threshold decreases with increasing particle diameter, but larger particles at lower concentrations tend to form less dense plugs. Notably, due to flow asymmetry, particle accumulation and bridging occur more readily downstream of the perforation. Two characteristic bridging modes were identified: single-particle bridging, which occurs when the particle diameter is too large to pass through the gap between the perforation and the ball-sealer; and multi-particle bridging, driven by the accumulation of smaller particles at higher concentrations in low-velocity regions.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Composite temporary plugging mechanism in horizontal well perforations
- Date Crossref
- 01/08/2025
- Éditeur
- AIP Publishing
- 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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Southwest Petroleum University National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation pays non établi dans la noticeUniversité ou école supérieure
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Gas Technology Institute pays non établi dans la noticeOrganisation à but non lucratif
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Chongqing University of Science and Technology pays non établi dans la noticeUniversité ou école supérieure
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Tianfu Yongxing Laboratory pays non établi dans la noticeStructure de recherche
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Shale Gas Research Institute pays non établi dans la noticeStructure de recherche
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School of Petroleum Engineering pays non établi dans la noticeUniversité ou école supérieure
National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation — Southwest Petroleum University, Gas Technology Institute et Chongqing University of Science and Technology, avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.