Fluid Identification Based on NMR Apparent Free Water Porosity Inversion: A Case Study of Paleozoic Tight Sandstone Gas Reservoirs in Western Ordos

Figure 2

Analysis results of microscope images of polished thin sections in the study area. (a) Well Li40, 4038 m P2x8, intergranular pores and intracrystal pores; (b) Li46, 4225 m P2x8, intracrystal pores; (c) Li53, 3981 m P2x8, intergranular pores, dissolved pores, and intracrystal pores; (d) Well Li55, 3814 m P2x8, intergranular pores, dissolved pores, and intracrystal pores; (e) Well Li57, 3784 m P2x8, dissolved pores and intracrystal pores; and (f) Well Li57, 3798 m P2x8, intergranular pores and intracrystal pores.