Analyzing the Origin of Low Resistivity in Gas-Bearing Tight Sandstone Reservoir

Figure 5

Thin sections to study the clay minerals’ distribution form: (a) parallel layer enrichment, X-B-3, 3567 m; (b) banded enrichment, X-A-2, 3962.1 m; (c) thin-film form, X-A-2, 3640 m; (d) fibroid form X-A-1, 3446 m.

(a)

(b)

(c)

(d)