Fig. 7 | Scientific Reports

Fig. 7

From: Accurate lithofacies identification in deep shale gas reservoirs via an optimized neural network recognition model, Qiongzhusi Formation, southern Sichuan

Fig. 7

(a) Core photo of A1 well (3304.31 m), black siliceous shale with horizontal bedding. (b) Thin section photo of well A1 (3297.43 m), quartz particles with a maximum particle size of 0.12 mm, as shown by the green line. (c) Core photo of Z2 well (4694.14 m), carbonaceous shale with mirror scratches and high carbon content. (d) Thin section photo of well Z2 (4694.27 m); carbonaceous shale with a layered structure and distribution of clustered and banded organic matter. (e) Scanning electron microscopy image of well Z2 (4693.82 m), carbonaceous shale with organic matter-filled intergranular pores of moldy pyrite.

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