Pore Structure Differentiation between Deltaic and Epicontinental Tight Sandstones of the Upper Paleozoic in the Eastern Linxing Area, Ordos Basin, China

Figure 11

Characteristics of carbonate cements in coal-measure sandstone. All the sections were selected from the Taiyuan Formation of well LXD-2, which is located in the central part of the study area, and the depths are marked. (a) Fe-calcite fills the dissolution pores; (b) Fe-dolomite cementation; (c) clustered siderite; (d) siderite with a zonal distribution.