Acid fracturing stimulation

Chang, Frank

doi:10.1016/b978-0-12-822721-3.00002-2

Cited by 2 publications

(1 citation statement)

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“…Based on statistical data from IHS Markit, carbonate oil and gas resources have a proportion of about 70% of the total oil and gas resources globally, proven recoverable reserves of about 50%, and production of about 60%. These reservoirs are usually huge in areal extent and thickness and heterogeneous in pore structure [3], mainly distributed in the Jurassic, Cretaceous, and Neogene strata. China is also abundant in carbonate oil and gas resources, especially in the western part [4,5].…”

Section: Introductionmentioning

confidence: 99%

CFD−DEM Simulation of a Jamming Mechanism and Influencing Factors of a Fracture-Shrinking Model

Zhang,

Lu,

Zhang

et al. 2024

Processes

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Fractured-vuggy reservoirs are crucial for increasing unconventional oil storage and production, but the controlling mechanism of this dominant flow channel remains vague, and the jamming mechanism of modulator particles is unclear. This study explores the filling and jamming processes of particles in the fractures by conducting a computational fluid dynamics−discrete element method (CFD−DEM) coupled simulation, considering the variation of fracture width, fluid velocity, particle size, and concentration. Results suggest that four sealing modes are proposed: normal filling, local jamming, complete sealing, and sealing in the main fracture. The ratio of particle size to the main fracture width exerts the primary role, with the ratio having a range of 0.625 < D/W ≤ 0.77 revealing complete jamming. Furthermore, an optimal particle size for achieving stable sealing is observed when the particle size varies from 2 to 2.5 mm. A higher concentration of particles yields better results in the fracture-shrinking model. Conversely, a greater velocity worsens the sealing effect on fractures. This research can offer technical support for the large-scale dissemination of flow regulation technology.

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Section: Introductionmentioning

confidence: 99%