Table 6 Volumetric expansion results of coal powder.

From: Analysis of geological characteristics and potential factors of formation damage in coalbed methane reservoir in Northern Qinshui basin

Liquid No.

1#

2#

3#

4#

Average swell volume of fracturing fluid

Swelling rate

/ %

Liquid

Kerosene fuel oil

Fracturing fluid 1

Fracturing fluid 2

Fracturing fluid 3

Volume / mL

1.43

1.53

1.55

1.59

0.24

9.83

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