Major Achievements

Scientific drilling of the Koyna pilot borehole KFD1 to a depth of 3 km and the acquisition of downhole geophysical data were completed. Passing through ~1.25 km - thick succession of Deccan basalt flows and ~1.75 km into the underlying granite-gneiss basement rocks, the borehole is the deepest drilled through crystalline rock formations in the country. Cuttings were collected at 5 m intervals in basalt and 3 m intervals in basement rock. Additionally, limited cores were collected from discrete depths in the 1500-3000 m section. To keep pace with the drilling, three field laboratories were functional on site: (i) geological lab., (ii) mud-logging lab., (iii) online gas and fluid sampling lab.