OVL, the overseas arm of state explorer Oil and Natural Gas Corp (ONGC), in September 2013, roped in Denver-based Liberty Resources to tap Bazhenov shale formations in Siberia.
Liberty and OVL had done a lot of work on the Snezhnoye field and had planned two horizontal pilot wells to explore how to exploit oil from low permeability and hard-to-recover tight sand reservoirs as well as Bazhenov shale in Imperial's acreages.
But with US imposing sanctions on Russia over its involvement in Ukraine meant that the American company could not work in that country. Liberty had hoped that it can win a waiver but the US administration was not obliging.
Liberty had expertise in exploration of tight sand reserviors and OVL was willing to give the American firm up to 30 per cent stake in Imperial Energy - the Russia-focused company it acquired in 2009 for USD 2.1 billion.
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Imperial Energy has been a loss making venture for OVL as production did not match the targets projected before the acquisition and the oil was trapped in difficult sand formations.
A total of four wells will be drilled at an investment of USD 10 million to test recovery of oil from Bazhenov shale, he said.
Bazhenov is believed to hold around 360 billion barrels of recoverable reserves.
Scope of activities and core assets of Imperial Energy are clustered in the Northern and Western part of Tomsk region in Siberia.
OVL had on September 12, 2013, signed a technology partnership agreement with Liberty, one of the global leaders in hydro-fracturing technology and completion in tight reservoirs.