Royal Dutch Shell Plc, shedding assets to pay for its takeover of BG Group Plc, is in talks to sell its interest in a Gulf of Mexico oilfield to Focus Oil, according to people familiar with the matter. The deal could value Shell’s stake in the Caesar Tonga field at about $1.3 billion, said the people, who asked to not be identified because the matter isn’t public. A deal hasn’t been completed and negotiations could still fall apart, they said. Shell has a 22.5 percent working interest in Caesar Tonga, with the rest owned by companies including field operator Anadarko Petroleum Corp., Equinor ASA and Chevron Corp., according to company filings. A sale could further Shell’s efforts to dispose of […]