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Retention of Hydraulic Fracturing Water in Shale: The Influence of Anionic Surfactant

Figure 5. The Energy-Dispersive X-Ray (EDX) spectra of (a) BG-2 and (b) KH-2 shales with a corresponding miniature FE-SEM images.

Retention of Hydraulic Fracturing Water in Shale: The Influence of Anionic Surfactant However, the role of some surface active agents like surfactants that are added in the hydraulic fracturing mixture in this issue needs to be understood. In this study, the influence of Internal Olefin Sulfate (IOS), which is an anionic

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