The Distribution and Origin of Carbonate Cements in Deep-Buried Sandstones in the Central Junggar Basin, Northwest China

Figure 9

Photomicrographs of petrographic features of the Xishanyao Formation sandstones. Full view of pores and intergranular secondary pores develops from a blue-epoxy-impregnated thin sections of conventional core samples. The remnant of calcite and feldspar can be found after dissolution. (a), (b) Y2 well at 5961.5 m with magnification of 40; (c), (d) Y6 well at 5978 m with magnification of 40; (e), (f) Y1 well at 5876.3 m with magnification of 40; (g), (h) Y7 well at 6102.95 m with magnification of 40.

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