Distribution and Thermal Maturity of Devonian Carbonate Reservoir Solid Bitumen in Desheng Area of Guizhong Depression, South China

Figure 8

Infrared spectroscopy of solid bitumen in Rongxian Formation of well DS1 and other area. (a) DS-D02, 2866.70 m, (b) DS-D09, 2866.78 m, and (c) DS-D12, 2868.08 of oolitic limestone in well DS1. (d) Silurian bitumen from well H1 (6081 m) of Tarim Basin, (%) = 0.36% [29], characterized with richness in aliphatic chains (2800–3000 cm⁻¹). (e) Carboniferous bitumen from well LN14 (5070 m) of Tarim Basin, (%) = 0.64% [29], characterized with richness in aliphatic chains (2800–3000 cm⁻¹). (f) Cambrian bitumen from Northwestern Hunan, depth = 335 m, (%) = 4.88% [3], characterized with lack of aliphatic chains and richness in aromatics C=C chains (1450 cm⁻¹).