The Organization of the Petroleum Exporting Countries is slated to meet Friday in Vienna. VIENNA—An internal OPEC document written to prepare a crucial meeting Friday warns oil prices will remain under pressure in the near future while markets would remain oversupplied even if the cartel cut its production. The analysis, which was reviewed exclusively by The Wall Street Journal, underscores the conundrum faced by the Organization of the Petroleum Exporting Countries as it tries to respond to an oil price slump. At the meeting Friday in Vienna, a heated debate is expected between a faction that wants a reduction in production to boost prices and another arguing such a move would only give away market share to competitors such as U.S. tight oil. The document, a transcript of a technocrat meeting last week to prepare the summit, warns that “overall the current surplus, while easing, should continue to cap […]