Geochemical characteristics of solid bitumen in Upper Jurassic carbonate reservoir are investigated. Aromatic maturity parameters indicate peak to late oil window level of maturity for the bitumen samples. Regular sterane distributions, conical variable (CV), plots of delta C-13(Sat) versus delta C-13(Aro) and Pr/nC(17) against Ph/n(C18), predominance of C-23 tricyclic terpane, ratios of steranes/hopanes and C-23/C-21 tricyclic terpane indicate charging from clastic-rich anoxic marine source rocks. Ratios of C-29/C-30 hopane, Ts/Ts+ Tm, C-24 tetracyclic terpane/C20-26 tricyclic terpanes and plot of C-22/C-21 versus C-24/C-23 tricyclic terpanes show influences of carbonate/marl facies. All these would throw crucial guiding light on the interpretation of the future exploration.