Geofluids / 2019 / Article / Tab 1

Research Article

Experimental Study of Fracturing Fluid Retention in Rough Fractures

Table 1

Classification criteria of fractures.

TypeApertureCharacteristicConnectivity

Primary fracture>0.80 mmSingle, large aperture, main flow channelExcellent conductivity
Secondary fracture0.25–0.80 mmLarge number, small apertureGood connectivity with primary fracture
Microcrack<0.25 mmDiscrete distribution, small scalePoor connectivity

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