Diagenesis and Fluid Flow Variability of Structural Heterogeneity Units in Tight Sandstone Carrier Beds of Dibei, Eastern Kuqa Depression

Figure 8

Photomicrographs of the argillaceous ((a), Bt: biotite, IR: igneous rock) and calcite-cemented ((b), Cal: calcite, Qtz: quartz) sandstones under UV showing no bitumen and inclusions. Note that the orange fluorescence in the intergranular space is the mineral fluorescence from calcite cement.

(a)

(b)