General Source Rock Evaluation Parameters

      学习札记 2006-6-11 11:33:00

Quantity of Organic Matter

Organic Matter

Bitumen

Hydrocarbons

 

Wt.% TOC

Rock-Eval S2

Wt.% of Rock

ppm Rock

ppm Rock

Poor          

<0.50     

<1.0

<0.05

<500

<300

Fair          

0.5-1.0   

1.0-5.0

0.05-0.10

500-1000

300-600

Good        

1.0-2.0  

5.0-10.0

0.10-0.20

1000-2000

600-1200

Very good    

 2.0-4.0

10.0-20.0

0.20-0.40

2000-4000

1200-2400

Excellent 

>4.0

>20.0

>0.40

>4000

>2400

Quality of Organic Matter

Atomic H/C

Hydrogen Index (mgHC/gTOC)

Rock-Eval S2/S3

Gas                     

<0.80

<100

<3

Gas and Oil               

0.80-1.0

100-200

3-5

Oil and Gas             

1.0-1.2

200-350

5-10

Oil                                   

>1.2

>350

>10

Maturity of Organic Matter HC Generation

Maturation

Generation

Stage

Ro(%)

TAI

 

Tmax (oC)

Bitumen/TOC

mg EOM/g TOC

Rock-Eval PI

Immature Beginning Peak Post

<0.60

0.60

0.90

>1.20

<2.5                2.5-2.6            2.9-3.0         

>3.2             

<430

430-435445-450>460

<0.05

0.05-0.10 0.15-0.25

<0.05

<50

50-150

150-250

<50

<0.10

0.10-0.15

0.15-0.25

<0.20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Organic matter quantity and quality are maturation dependent. TOC = total organic carbon; TAI = thermal alteration index based on spore coloration index; Rock-Eval PI (production index) = S1/(S1*S2), HC = hydrocarbon; E0M = extractable organic matter.

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