In a report tabled in Parliament today, CAG said the state-owned firm lacked uniformity in preparation of annual rig requirement plan (RRP), delayed rig acquisitions and hiring, was inconsistent in deployment and had inefficient repair and refurbishment policy.
ONGC's non-productive time or idling time of rigs ranged between 19 and 23 per cent over 2010-14. "The bulk of idling time costing Rs 6,418 crore was due to factors which could have been controlled by the company," CAG said.
As a result, another anchor of the rig snapped which caused drifting of the rig from its location. Consequently, the well had to be closed and abandoned. As a result, expenditure of Rs 1,577.27 crore incurred by ONGC on drilling of the original location and drilling of a relief well by using another rig proved avoidable.
"The insurer did not honour the claim of ONGC on the ground that the latter had not followed recognised safe operating practice," the report said.
Failure on the part of the company led to a situation wherein rigs were being operated with outdated/obsolete equipment, CAG said.
CAG said ONGC had prepared 5-year rig requirement on the basis of RRP, which included non-operational idling time of rigs that was entirely controllable by the company.
Annual Rig Deployment Plans (RDPs) were prepared on the basis of RRP. "Therefore, the Annual Rig Deployment Plans had an in-built inefficiency," it said.
Meanwhile, four out of six owned offshore rigs outlived their economic usable life of thirty years.
CAG asked ONGC to ensure that the plans (five year plan, annual plan, rig requirement plan, rig deployment plan) are complete and consistent with each other and are complied with.
The situation where one out of every three wells drilled is un-planned needs to be corrected, it said, adding that the controllable non-productive time of past periods should not be loaded to future rig requirement plans and efforts to be taken to reduce such non-productive time.
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