Fig. 5

Schematic of (a) photo of field drilling of the ZR2 well, (b) the obtained drilling cores from ZR2 well, (c) the processed cylindrical rock specimens and (d) the processed powdered rock specimens.

Schematic of (a) photo of field drilling of the ZR2 well, (b) the obtained drilling cores from ZR2 well, (c) the processed cylindrical rock specimens and (d) the processed powdered rock specimens.