Oil India Ltd. (OINL) , the nation’s second-biggest state-run explorer, is studying an acquisition of Nigerian oil and gas assets owned by Royal Dutch Shell Plc (RDSA) , according to people familiar with the matter. Oil India is weighing a bid for stakes Shell holds in some onshore blocks, valued at as much as $2 billion, the people said. It will partner with India’s Sandesara Group on the potential purchase, according to the people, who asked not to be identified as the deliberations are private. The explorer joins Dangote Group , controlled by Africa’s richest man, and Seplat Petroleum Development Co. in seeking to acquire Nigerian assets being sold by Western rivals. Shell and Chevron Corp. are divesting fields in the country amid persistent violence and crude theft in the oil-rich Niger River delta. India’s government-run oil companies are building on their record $5.5 billion of acquisitions last year […]