(a)
(b)
(c)
(d)
(e)
(f)
Figure 5: Photomicrographs of zeolite diagenesis and dissolved zeolite related to basalt eruption of the Paleogene sandstone reservoirs in well BZ-1. (a) Zeolite precipitated perpendicular to basalt rock fragments, E3d1, 2259 m (7411 ft). (b) Zeolite filled in intergranular pores, E3d1, 2265 m (7431 ft). (c) Zeolite developed pervasively and chlorite clay envelope occurred, E3d, 2351 m (7713 ft). (d) Micrograph of thin section showing the zeolite partly and completely dissolved and chlorite clay envelope occurred, E3d1, 2280 m (7480 ft). (e) Micrograph of thin section showing dissolved amygdaloid pores of zeolite, E3d1, 2280 m (7480 ft). (f) Micrograph of thin section showing the zeolite partly and completely dissolved, E3d1, 2280 m (7480 ft). BR = basalt rock fragments, CCE = chlorite clay envelope, Kf = K-feldspar, Q = quartz, Zeo = zeolite, and ZDP = zeolite dissolved pore.