Production declines from Saudi Arabia to Libya also buoyed a market that plummeted last year on fears of a supply glut
Oil has climbed since early August as speculation swirls over whether the OPEC and its allies will boost production, with sanctions on the Middle East nation's exports set to take effect in November
Output was boosted by a recovery in Libyan production and as Iraq's southern exports hit a record
Opec and non-Opec partners including Russia have since 2017 cut output by 1.8 million barrels per day (bpd) to tighten the market and prop up prices
Futures for September delivery on the Shanghai International Energy Exchange gained 1.9 percent to 481.9 yuan a barrel, rising for a third day
Brent hit $70.37 a barrel on Monday, its strongest since December, 2014, which marked the beginning of three years in the doldrums for oil prices
US West Texas Intermediate (WTI) crude futures were at $64.35 a barrel, up 5 cents from their last settlement
ANZ bank said on Monday oil prices had recently risen on data that continued to show the market is tightening
Oil futures in New York have jumped almost 40 per cent since June as Opec and its allies extended their production-cut deal and US inventories shrank to two-year lows
Brent hit a peak of $64.93 a barrel in the previous session, its highest level since June, 2015