Fig. 1. Micrograph of reservoir bitumen in the Baiceng area of Southwest Guizhou
(a):Calcite and bitumen in outcrop geodes; (b): Micrograph of symbiosis and cutting relationship between bitumen and calcite; (c): Symbiosis of calcite and bitumen, containing bitumen vein; (d): It is the fluorescence photo of figure C, and bitumen does not emit light under fluorescence; (e): Carbonaceous bitumen; (f): Carbonaceous bitumen and homogenization temperature of its associated aqueous inclusion

Fig. 2. Homogenization temperature histogram of aqueous inclusions in the Baiceng area of Southwest Guizhou

Fig. 3. Raman spectra and corresponding microscopic photos of reservoir bitumen in the Baiceng area of Southwest Guizhou

Fig. 4. Maturity distribution map of reservoir bitumen in the Baiceng area of Southwest Guizhou

Fig. 5. Determination of hydrocarbon accumulation time in the Baiceng area of Southwest Guizhou

Table 1. Discrimination table for evolution degree of reservoir bitumen in Baiceng area of Southwest Guizhou