* Brent falls after China lifts bank reserves ratio
* Focus on ongoing Middle East, North Africa tensions
* March U.S. light crude <CLc1> contract expires Tuesday
* Weekend G20 meeting to address commodity price inflation
(Updates prices)
By Zaida Espana
LONDON, Feb 18 (Reuters) - Brent futures prices were flat on Friday in volatile trading after China increased lenders' reserve rates, which balanced against continuing political tensions in the Middle East and North Africa.
China's increase in bank reserve requirements prompted fresh worries about its oil demand growth, but analysts said the move was not a surprise. [
]"They have been trying to curb liquidity for some time, so little surprise and not as bad as a benchmark rate rise, but still slightly weighing on sentiment," said Andrey Kryuchenkov from VTB Capital.
Brent crude futures <LCOc1> were flat at $102.59 a barrel by 1525 GMT, down from earlier highs of $103.5 a barrel.
The Brent and U.S. light crude benchmark future contracts continued to go their separate ways, with U.S. March light crude future <CLc1> turning positive.
The front-month U.S. contract was up $1.00 at $87.36 a barrel as investors looked to cover shorts ahead of the contract's expiry on Tuesday, and before Monday's market holiday in the United States. The U.S. light crude April future contract <CLc2> was $1.56 stronger at $90.40 a barrel.
Tensions in the Middle East remained in focus after Egypt said it had received a request for Iranian naval vessels to pass through the Suez Canal on Friday, a move Israel's right-wing foreign minister has described as "provocative." [
]Soldiers sought to put down unrest in Libya's second city on Friday and opposition forces claimed to be fighting troops for control of a nearby town after days of crackdowns Human Rights Watch said killed 24 people. In Bahrain, sporadic shots were heard in the area of Pearl Square, a day after police forcibly cleared a protest camp from the traffic circle in Manama, witnesses said. [
] [ ]"When social unrest and political upheaval erupts in the biggest oil producing region of the globe, it is not a wise strategy to short energy," David Hufton from brokerage PVM wrote in a note. <^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Graphics package on the Middle East
http://r.reuters.com/nym77r ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^>
G20 ALSO IN FOCUS
Investors also mulled data from the European Central Bank showing that overnight emergency funding reached 16 billion euros ($21.7 billion) on Friday, the highest level since June 2009. [
]The news flagged fresh concerns over the health of the European banking system as finance ministers and central bankers from the Group of 20 meet in Paris to discuss the global economy and commodity price inflation over the weekend. [
]The debate concerning crude benchmarks continued as the spread between Brent and U.S. light crude <CL-LCO1=R> came in to $12.04 by 1517 GMT.
"The historic WTI-Brent spread of $1-$2 a barrel may have shifted to a normalized negative differential of about $2-$3 a barrel. Current physical market conditions in Cushing and in Europe/Asia, however, have pushed the spread to historic lows of $15-$20 a barrel" Deutsche Bank's chief energy economist Adam Sieminski said in a note.
Nomura's Michael Lo argued the change in global oil demand growth was playing a role in the weakness of U.S. light crude, also known as West Texas Intermediate (WTI).
"Future oil demand growth will likely come from the Asia Pacific region, and new refineries are being built in this region to meet new demand. WTI plays almost no part in this region, and the demand and supply dynamics are very different," Lo wrote in a note. "Brent is increasingly being recognised as a crude benchmark in Asia." (Additional reporting by Jennifer Tan in Singapore and Ikuko Kurahone in London; editing by Jane Baird)