Difference of Microfeatures among Diagenetic Facies in Tight Sandstone Reservoirs of the Triassic Yanchang Formation in the Midwestern Region, Ordos Basin

<div>Different types of pressure curves and pore throat distribution characteristics. (a) Residual chlorite-membrane intergranular-pore diagenetic facies, A3, 1945.2 m. (b) Feldspar dissolution diagenetic facies, Y182, 2101.2 m. (c) Clay mineral cemented microporous diagenetic facies, A211, 1922.6 m. (d) Carbonate cemented tight diagenetic facies, Y144, 2178.4 m.</div>

Mathematical Problems in Engineering

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Figure 4

Figure 4: Difference of Microfeatures among Diagenetic Facies in Tight Sandstone Reservoirs of the Triassic Yanchang Formation in the Midwestern Region, Ordos Basin 

Figure 4 | Difference of Microfeatures among Diagenetic Facies in Tight Sandstone Reservoirs of the Triassic Yanchang Formation in the Midwestern Region, Ordos Basin 