The following organic geochemical analyses were performed on 7 sidewall core and 4 crude oil samples from Wancoocha 2, 1 crude oil sample from Wancoocha 3 and 1 crude oil sample from Pando 1: 1) C1-C31 whole oil gas-liquid chromatography; 2) C4-C7 gasoline range gas-liquid chromatography; 3) liquid chromatography; 4) C12 saturate gas-liquid chromatography; 5) GC-MS of saturate fraction; 6) C13/C12 carbon isotope ratio determination. Detailed analytical results in the form of labelled chromatograms and tabulated quantitative data are presented to qualify the interpretative discussion. The above organic geochemical analyses have indicated the following: - the Murta Member and Patchawarra Formation in Wancoocha 2 have fair to good gas / condensate and light oil source rock characteristics; - the 6 crudes from the Murta, Birkhead Formation, Hutton Sandstone and Patchawarra reservoirs are light oils which have not undergone any bacterial attack, although the Mesozoic crudes may have undergone some water washing. The oils have originated from source rocks that contain mainly terrestrial organic matter; - the GC-MS and carbon isotope data group all 6 samples into a single family, whereas the C4-C7 data break out a Murta, Birkhead-Hutton and Patchawarra family. The latter grouping may be due to the water washing of Mesozoic crudes. The liquid chromatography data indicates the Mesozoic reservoired oils are more saturate-rich than the Permian oils. All the oils lack significant quantities of tetra and tri-cyclic compounds, which are abundant in most other terrestrially-sourced Mesozoic crudes from elsewhere in Australia. This might suggest that the oils are from the Permian, but additional GC-MS data from rocks and oils of both ages is required to confirm the finding. Due to limited source rock correlation data, crude oil - parent source rock relationships were unable to be established.