Jubilant Energy NV, Amsterdam, has spudded the North Atharamura-1 vertical well on the Tripura block in India as a follow-up to its 2012 Matabari-1 indicated gas discovery and to explore deeper formations.
North Atharamura-1 is projected to 4,000 m to explore the hydrocarbon potential of suprathrust Middle Bhuban and Lower Bhuban sands and subthrust Lower Bhuban, Renji, and Jenam sands. It is the first exploratory well on the block to targets deeper than the Middle Bhuban on the Atharamura anticline.
The drillsite is 6.7 km southwest and updip from the Ambasa North exploratory well.
Matabari-1, projected to 4,070 m measured depth, was terminated with 19.7 ppg mud and plugged at 3,287 m MD due to well control issues. Jubilant identified three gas-bearing sand intervals of interest a combined 20 m thick on mud log and petrophysical interpretations in the Middle Bhuban formation.
Sand-1 is the firm zone proposed in the interval 2,571.5-78 m, Sand-2 in the interval 2,393-98 m, and Sand-3 at 2,326-30 m and 2,332.5-37 m. Calculated absolute open flow based on a minidrillstem test in Sand 1 is 4.2 MMscfd.
Jubilant Oil & Gas Pvt. Ltd. is block operator with 20% participating interest, and GAIL India Ltd. has 80%.