Filled oil drums are seen at Royal Dutch Shell Plc’s lubricants blending plant in the town of Torzhok, north-west of Tver, November 7, 2014. Royal Dutch Shell ( RDSa.L ) reported a more than 70 percent fall in quarterly profit on Thursday, well below analyst estimates, blaming weak oil prices, poor refining profits and higher charges resulting from its $54 billion acquisition of BG Group. Shell’s current cost of supplies — its definition of net income — came to $1 billion in the second quarter, compared with analyst expectations of $2.2 billion and $3.8 billion achieved the same time last year. “Lower oil prices continue to be a significant challenge across the business, particularly in the upstream (business),” said Chief Executive Ben van Beurden, who said last month he wants to turn Shell into the best oil company for investor returns. Rivals BP ( BP.L ) and Statoil ( […]