Table 1 Correlation coefficients between TPI, V/I values and logging parameters.

From: Sequence division and coal facies research methods of the deep No. 8 coal seam in the Daning-Jixian Block, eastern margin of Ordos basin

 

TPI

V/I

AC

CN

DEN

GR

RT

SP

TPI

1.000

       

V/I

0.340

1.000

      

AC

−0.069

0.118

1.000

     

CN

0.167

0.140

0.460

1.000

    

DEN

0.040

– 0.133

– 0.384

0.029

1.000

   

GR

– 0.146

– 0.168

– 0.332

– 0.084

0.723

1.000

  

RT

0.144

0.111

– 0.041

– 0.128

– 0.076

0.000

1.000

 

SP

0.106

– 0.212

0.058

0.127

0.405

0.114

– 0.125

1.000

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