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

Figure 10

Distribution of bitumen in the carbonate reservoirs of well DS1 in Guizhong Depression. (a) DS-X08, 2866.24–2866.35 m, 5x (−), differences in ooids size on both sides of the diagenetic fracture in oolitic limestones of Rongxian Formation. (b) DS-X51, 4648.27 m, 5x (−), differences in size of calcite crystals on both sides of the dissolution fractures in algal mudstone of Yingtang Formation. (c) DS-X53, 4648.76– 4648.81 m, 5x (−), grid-like dissolution fractures in dolomite of Yingtang Formation.

(a)

(b)

(c)