Determination of Formation Time of Calcareous Cements in Marine Sandstone and Their Influence on Hydrocarbon Accumulation: A Case Study of the Carboniferous Donghe Sandstone in the Hadexun Oilfield, Tarim Basin

Figure 2

Photographs with depths of cores sampled from the Hadexun Oilfield.

(a) Calcareous interlayer, 5070.07 m, Well HD4

(b) Calcareous interlayer, 5070.62 m, Well HD4

(c) Calcareous interlayer, 52.5098 m, Well HD4

(d) Calcareous interlayer, 5529.01 m, Well HD17

(e) Calcareous interlayer, 5529.47 m, Well HD17

(f) Calcareous interlayer, 5230.13 m, Well HD17