Oil India faces Sindhuja#1 well collapse

Vol 19, PW 25 (25 Aug 16) News in Brief

Weak formations below the seabed are slowing the drilling of Sindhuja#1, Oil India's first offshore exploration well in nearly two decades.

The drillbit of Transocean rig GSF 140- was at 3350 metres on August 23 and there is still time left before it reaches 5600 metres TD. "Drilling is happening quite slowly at about 7 metres/hour," we hear.

"Oil India drills and the entire hole collapses, forcing them to suspend drilling to deal with the problem. 'Formation collapse' is a challenge at this well." By end-July, Oil India had inserted the 13 and five eighth-inch casing in the 17.5-inch diameter hole at 2800 metres.

The next 9 and five eighth inch diameter casing will be inserted into the 12.25-inch diameter hole at 4200 metres. Still unclear is when it will reach this depth.

"Since the last casing 500 metres has been drilled," we hear. "Oil India was expecting faster progress." Meanwhile, at Reliance's KG-D6 block, Transocean's rig DD-KG2 is working over well KG D6-MA-4H in water depths of 1172 metres.

Reliance encountered water and had to sidetrack the well. Workover is expected to take three more weeks.