Petroleum Potential of the Congo Basin - Geology and Resource Potential of the Congo Basin - page 371

Table 18.3 Average Organic matter analytical values, from the data of Tables 18.1 (JNOC samples) and 18.2 (RMCA and Kadima ( 2007 ) samples)

Sample depth
(m)/
provenance

n Corg n RE n Vr Corg (%) CaCo3 Tmax ( C) HI (mg/g Corg) OI (mg/g Corg) Vr (%) Type

Region Group Formation Maturation

Kipala Kwango Inzia Outcrop 2 8.66 438.5 749 30 I Early mature

Dekese Loia Couches C 703-708 2 0.08 1.81 Barren

Samba Loia Couches 4 568-825 22 13 3.52 13.01 432.6 806 58 I Immature

Kananga Loia Red beds JNOC 31 1 0.15 Barren

Samba St ' ville Couches 5 1008-1031 8 0.43 13.11 Barren

Kisangani St ' ville Grey shales Outcrop 6 6 10.8 41.25 430.8 909 66 I Immature

Kisangani St ' ville Grey shales JNOC 17 17 1 7.57 432.8 922 31 0.77 I Early mature

Kisangani St ' ville Limestone JNOC 13 6 1.23 426.0 535 49 II Immature

Kisangani St ' ville Mudstones JNOC 38 8 0.24 426.1 112 83 III Immature

Kisangani St ' ville Sandstone JNOC 6 0.24 Barren

Lubutu? Lukuga Varval clay JNOC 7 6 5 1.01 433.3 39 46 0.58 III Transitional

Kindu Lukuga Varval clay JNOC 2 2 1 0.75 439.0 22 79 0.75 III Transitional

Walikale Lukuga Varval clay Outcrop 10 7 4 0.55 10.99 440.9 52 155 0.94 III Oil zone

Kalemie Lukuga Coal seam Outcrop 1 1 47.7 3.17 426.0 204 38 III Early mature

Dekese Lukuga Couches D 712-732 4 0.11 18.03 Barren

Dekese Lukuga Couches F 924-1,052 16 5 13 0.54 0.94 421.4 32 134 0.93 III Oil zone

Dekese Lukuga Couches F 1,060-1,100 11 7 8 1.04 0.63 416.0 50 50 0.98 III Oil zone

Dekese Lukuga Couches F 1,130-1,261 9 8 7 0.69 1.99 423.0 40 86 0.98 III Oil zone

Dekese Lukuga Couches F 1,310-1,530 8 2 5 0.33 1.59 418.0 39 211 1.11 III Gas zone

Dekese Lukuga Couches F 1,530-1,550 9 3 0.36 0.96 1.14 III Gas zone

Malili-Ban. Aruwimi Alolo Outcrop 10 0.13 14.62 Barren
Yambuya Aruwimi Alolo Outcrop 24 12 0.58 53.70 435.4 27 158 Residual
Lindi bridge Aruwimi Alolo Outcrop 4 0.18 34.58 Barren
Bombwa Lokoma Mamungi Outcrop 8 0.08 14.97 Barren
Ubangi Lokoma Mamungi Outcrop 9 0.11 14.34 Barren
Ituri Ituri Lenda Outcrop 6 0.11 67.19 Barren
West-Congo Schisto-Calcaire Bangu Ouctrop 1 0.08 Barren
For the JNOC samples, only the Rock-Eval data are displayed in Table 18.1 . The Corg. Values for the samples for which no Rock-Eval data are available are from JNOC (1988). nCorg, n RE, n
Vr: respectively number of Corg, Rock-Eval and vitrinite reflectance analyzed. Parameters as in Tables 18.1 and 18.2 . Organic matter type is estimated on the basis of the Van-Krevelen-
equivalent diagram (Fig. 18.3 ) and the maturation, on the basis of the vitrinite reflectance data (Vr) when available, or from the Tmax values otherwise, in a Espiatlie diagram (Fig. 18.4 ). Note that
the maturity estimation from the Lukuga Group samples in the Dekese well is overestimated due to the abundant presence of recycled vitrinite (Fig. 18.5 )