Table 6 Contrasting multifractal dimensions and productivity contributions in Well JY8-2.

From: A comprehensive logging evaluation method for identifying high-quality shale gas reservoirs based on multifractal spectra analysis

Producing test well section (m)

Fractal parameter

AC

CNL

DEN

GR

Gas production contribution rate

Yield classification

Gas production (m3/d)

3176.6438–3205.5

∆α

0.065

0.101

0.005

0.048

0.437

Low yield

3385.66

∆f(α)

−0.311

0.049

−0.011

0.327

f(α)max

1.078

1.078

1.078

1.078

B

0.017

0.003

−0.003

−0.013

D

1.515

1.514

1.523

1.365

3205.5–3283.3938

∆α

0.107

0.072

0.005

0.039

0.617

Middle yield

4774.54

∆f(α)

−0.452

−0.104

0.016

0.144

f(α)max

1.075

1.075

1.075

1.075

B

0.054

0.005

0.000

−0.004

D

1.517

1.647

1.569

1.405

3283.375–3338.125

∆α

0.056

0.062

0.007

0.044

0.299

Low yield

2315.16

∆f(α)

0.007

0.098

−0.044

0.205

f(α)max

1.074

1.074

1.074

1.074

B

0.000

−0.006

0.001

−0.009

D

1.579

1.628

1.536

1.514

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