NEW YORK (Bloomberg) — Crude oil may fall on speculation that production from OPEC members is increasing amid rising stockpiles in the US Midcontinent.

Thirteen of 27 analysts surveyed, or 48 percent, said oil will drop through this week. Nine, or 33 percent, said prices will rise and five forecast little change. Last week, 43 percent of respondents said oil would fall.

Members of the Organization of Petroleum Exporting Countries increased output by 1.6 percent in October, a Bloomberg News Survey showed.

OPEC agreed in September to raise production by 500,000 barrels a day starting on November 1.

Oil supplies at Cushing, Oklahoma, where New York-traded West Texas Intermediate oil is stored, rose 665,000 barrels to 15.2 million in the week ended November 23, an Energy Department report last Wednesday showed. Cushing stocks have increased for three consecutive weeks from the lowest in three years earlier this month.

Crude oil for January delivery fell $9.47, or 9.7 percent, to $88.71 a barrel this week on the New York Mercantile Exchange, in the biggest weekly decline in two and a half years.

Prices fell $2.30, or 2.5 percent, last Friday. Futures touched $98.62 a barrel on November 7, the highest since trading began in 1983.

• Bloomberg's survey of oil analysts and traders, conducted each Thursday, asks for an assessment of whether crude oil futures are likely to rise, fall or remain neutral in the coming week. The results were: Fall (13); Neutral (5); Rise(9)