1. OPK-3 Mud Gas Analysis
Fig. 1 Comparison of d15N nitrogen vs. d13C methane measured on a RFT Gas sample from OPK-3A vs. samples within NAM's concession area.

2. OPK-3 Mud Gas Analysis
Fig. 2 Comparison of the carbon isotopic composition of a RFT Gas sample vs. Isotube Mud Gas samples from well OPK 3A and selected samples from surrounding fields as well as results from pyrolysis experiments of Westphalian coals (VAL-1).

3. OPK-3 Mud Gas Analysis
Fig. 3 Comparison of dD methane vs. d13C methane measured on a RFT Gas sample from OPK-3A ( after Schoell 1983).

4. OPK-3 Mud Gas Analysis
Fig. 4 Comparison of d13C methane and ethane isotope ratios measured on a RFT Gas sample from well OPK-3A vs. mud gas samples from well OPK-3A and pyrolysis results from selected source rocks.

5. OPK-3 Mud Gas Analysis
Fig. 5 Comparison of d13C ethane and propane isotope ratios measured on a RFT Gas sample from well OPK-3A vs. mud gas samples from well OPK-3A and pyrolysis results from selected source rocks.

6. OPK-3 RFT Gas Analysis (Maturity Map Base Wph D)
Drainage Area
@ Present Day
1D Location
Base Wph D
Fig. 6 Maturity distribution of the Base Westphalian D expressed as vitrinite reflectance (Vr %). Note that the drainage area for OPK includes no faults.

7. OPK-3 RFT Gas Analysis (1D depth Plot)
0.94
Top Wph D
0.97
Top Wph C
1.14
Top Wph B
1.55
Top Wph A
3.04
Top Namur
Fig. 7 Depth profile of Vitrinite Reflectance illustrating the maturity ranges of the major source rock units at Location 1 within the drainage area of OPK.

8. OPK-3 RFT Gas Analysis (1D Time Plots)
Base Wph D
HC Gas Expl. Rate
(kg/m2/Ma)
VR (%Ro)
Temperature (°C)
Base Wph B
Note:
0.13 kg/m2/Ma hydrocarbon gas
has been expelled during the
last time step
HC Gas Expl. Rate
(kg/m2/Ma)
VR (%Ro)
Temperature (°C)
Vitrinite Reflectance vs. Time
HC Gas Expulsion Rate vs. Time
Temperature vs. Time
Fig. 8 History curves of Hydrocarbon Gas Expulsion Rate (kg/m2/Ma), Vitrinite Reflectance (VR %Ro) and Temperature (°C) at Base Westphalian D & B level for Location 1.