* U.S. crude stocks post bigger-than-expected increase
* U.S. refinery utilization rate very low
* NYMEX makes biggest gain since September on Tuesday (Updates prices, recasts)
NEW YORK, Feb 3 (Reuters) - Oil fell to $77 a barrel in choppy trade on Wednesday after U.S. data showed a rise in crude inventories in the world's largest energy consumer, while product stocks dropped.
U.S. crude for March delivery <CLc1> fell 23 cents to $77 a barrel by 2:13 p.m. EST (1913 GMT). London ICE Brent crude <LCOc1> fell 23 cents to $75.83 a barrel.
U.S. commercial stockpiles of crude jumped by 2.3 million barrels to 329 million barrels in the week to Jan. 29, far surpassing analysts' forecasts for a 200,000 barrel increase, the Energy Information Administration (EIA) said. [
]The numbers confirmed Tuesday's data from trade group American Petroleum Institute, showing national crude oil inventories up a whopping 4.7 million barrels.
"The EIA data is bearish as the big inventory increase shows that demand is still poor. With refinery utilization at a very low level, refineries are having a hard time as demand just isn't there," said Phil Flynn, analyst at PFGBest Research in Chicago.
U.S. refinery utilization rates were off 0.8 percentage point at 77.7 percent of capacity last week -- their lowest level since 1990 barring hurricane disruptions.
Gasoline prices, however, rose to near two-week highs after a reported 1.2-million-barrel decline.
"The gasoline draw was counter-seasonal and looks supportive," said Jim Ritterbusch, president of Ritterbusch & Associates in Galena, Illinois.
Investors have looked to wider economic data over the past year for signs of economic recovery and a potential rebound in energy demand.
On Wall Street, U.S. stocks fell after President Barack Obama reiterated his commitment to overhaul the healthcare system and impose stricter regulatory reforms on Wall Street. [
]The dollar rebounded, rising against a basket of major currencies. A stronger greenback makes commodities priced in dollars more expensive for those holding other currencies. [
]Analysts also are keeping a close watch on Iran. The world's fifth-largest oil exporter said it had launched a domestically made satellite-carrier rocket carrying live animals into low-Earth orbit, a move that may fan concern about Tehran's nuclear intentions. [
]Western powers accuse Iran of trying to develop nuclear weapons under a civilian enrichment programme that Tehran says will fuel a future network of nuclear power plants that will free up domestic oil and gas for export.
In a report late on Tuesday, the American Petroleum Institute said U.S. crude stocks jumped by 4.7 million barrels last week. That compared with an average forecast gain of 200,000-barrel in a Reuters poll. [
] (Reporting by Edward McAllister, Chris Doering, Robert Gibbons and Gene Ramos in New York and Chris Baldwin and Christopher Johnson in London; Editing by David Gregorio)