Study on Fracture Morphological Characteristics of Refracturing for Longmaxi Shale Formation

Figure 1

Preparation of shale samples for refracturing test. (a) The location of the shale outcrop; (b) removing the weathered surfaces of the broken shale blocks; (c) large samples are cut into 300 mm × 300 mm × 300 mm cubic samples; (d) simulated casing; (e) prepared standard fracturing samples.

(a)

(b)

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(e)