2001
DOI: 10.1115/1.1386389
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Abstract: We have investigated porosity and permeability damage around perforations using a combination of transient analysis and X-ray CT. The method applied allowed us to perform the entire experiments on samples under simulated in-situ stress conditions and to map variations in permeability along the length of the core as well as with radial distance from the perforation. Berea (10.2-cm (4-in.) dia) cores saturated with low-viscosity silicone oil were perforated using conventional-shaped charges (6-g HMX) and API RP4… Show more

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Cited by 15 publications
(17 citation statements)
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“…Although exhibiting significant variability, the hydrocode permeability predictions also show reduced permeability near the tunnel wall, with permeability reduction largest near the opening. The axial variation in permeability predicted by simulation is in contrast with the interpretation of Karacan and Halleck [19]. They attribute the axial variation in permeability to variations in the pre-shot permeability of the rock because the outermost permeability measurements approach a constant near the opening and at the other end of the tunnel (indicating the permeability is independent of radius beyond 1.5 cm at these loca- tions).…”
Section: Mapping the Hydrocode Results To The Fines Simulatorcontrasting
confidence: 61%
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“…Although exhibiting significant variability, the hydrocode permeability predictions also show reduced permeability near the tunnel wall, with permeability reduction largest near the opening. The axial variation in permeability predicted by simulation is in contrast with the interpretation of Karacan and Halleck [19]. They attribute the axial variation in permeability to variations in the pre-shot permeability of the rock because the outermost permeability measurements approach a constant near the opening and at the other end of the tunnel (indicating the permeability is independent of radius beyond 1.5 cm at these loca- tions).…”
Section: Mapping the Hydrocode Results To The Fines Simulatorcontrasting
confidence: 61%
“…Their results (for 350 psi underbalance) show a gradual reduction in permeability approaching the perforation (see Figure 4a). In contrast with Rochon [15], Karacan and Halleck [16] do not observe a region of high permeability near the tunnel wall.…”
Section: Review Of Understanding Of Perforation and Flow Performancecontrasting
confidence: 73%
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