North Sea Crude-Grades rise, Buzzard returns

LONDON, June 18 (Reuters) - North Sea and U.S. WTI Midland crude differentials rose on Tuesday, supported by demand from Trafigura. BUZZARD BACK * The Buzzard oilfield in the North Sea resumed output over the weekend, a spokesperson for operator CNOOC said on Tuesday, after a production outage last month. PLATTS WINDOW * Indications are on a free-on-board (FOB) basis unless marked as cost, insurance and freight (CIF) or delivered at place (DAP). * No deals, a trade source said. * WTI Midland: Trafigura bid for July 5-22 CIF Rotterdam at dated Brent plus $1.50, equating to around dated plus 22 cents on a FOB basis, according to Reuters calculations. * Forties: Trafigura bid for July 14-15 at dated Brent plus 10 cents, up from Monday's value. * Oseberg: Trafigura bid July 3-5 at dated Brent plus $2.00. * Ekofisk: Trafigura bid July 1-20 at dated Brent plus $1.85. * Brent: Trafigura bid June 28-July 20 at dated Brent plus 20 cents. * Troll: Trafigura bid June 28-July 20 at dated Brent plus $1.80. (Reporting by Alex Lawler; Editing by Mark Potter)