Oil prices remained stable in early trade on Tuesday, with a potential of increased supply entering the market amid weak global demand growth.Brent crude futures for December delivery rose 13 cents, or 0.18%, to $71.83 a barrel. US West Texas Intermediate oil futures for November delivery rose 11 cents, or 0.16%, to $68.28 per barrel.Oil markets have been under pressure from weaker-than-expected demand growth this year, particularly in China, the world's biggest crude importer. Those demand concerns were reinforced on Monday after data showed the country's manufacturing activity shrank for a fifth month in September.Source: Qatar News Agency