Formation Mechanism and Prediction Method for the Permian Fused Breccia Tuff Reservoir, Wuxia Region, Junggar Basin

Figure 2

(a) Well X72, 4814 m, rhyolitic fused breccia tuff with stoma development, ×20, lithology photo. (b) Well X201, 4932.56 m, the rock is mainly composed of volcanic breccia, vitric pyroclast, and tuffaceous matters, the volcanic breccia is composed of felsite and tuff, and the stomas are partially filled, ×20, lithology photo. The rock around the vesicles displays fluorescence. (c) Well X202, 4824.11 m, felsite rock debris, magmatic pyroclasts and vitric pyroclasts can be seen, ×40, casting thin section. (d) Well X202, 4824 m, vitric pyroclast tuffaceous structure, andesite volcanic breccia can be seen, ×40, casting thin section. (e) Well X72, 4808.62 m, quartz particles can be seen at the edges of vesicles, ×40, casting thin section. (f) Well X201, 4933.21 m, vesicles are filled with quartz or calcite, ×25, casting thin section.

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