Factbox: Energy ops largely unaffected by BP slick

NEW YORK (Reuters) - Energy operations on the U.S. Gulf Coast and in the Gulf of Mexico have continued normally for the most part, despite the spread of a huge oil spill in the gulf off the Louisiana coast.

The spill has raised concerns among some in the oil industry that the slick could hurt energy operations in the region.

A blown out undersea oil well owned by BP Plc is spilling about 5,000 barrels (210,000 gallons, or 955,000 liters) a day, creating a slick at least 130 miles by 70 miles.

Traders, analysts and shipbrokers say the spill could eventually slow vessel traffic in the key Gulf Coast region and affect the energy industry.

Delays in vessel traffic, particularly the tankers delivering crude, can affect refineries in the region. However, many refiners, including Chevron, Exxon, Marathon, Shell and Valero, have said the spill has not impacted their operations.

Below is a list of energy infrastructure in the Gulf of Mexico near the BP oil spill:

REFINERIES:

Refineries closest to the spill and their capacity:

Mississippi

- Chevron: Pascagoula -- 330,000 bpd

Louisiana

- Conoco: Alliance in Belle Chasse - 247,000 bpd

- Murphy: Meraux - 120,000 bpd

- Chalmette: Chalmette - 192,500 bpd

- Shell: St. Rose - 55,000 bpd

- Valero: Norco - 185,000 bpd

- Motiva: Norco - 236,400 bpd

- Marathon: Garyville - 256,000 bpd

- Motiva: Convent - 235,000 bpd

OIL PRODUCTION

Offshore fields in the Gulf of Mexico account for about one-fourth of U.S. crude production.

* No production has been curtailed as a result of the oil spill and clean-up response so far, but officials remain in contact with oil and gas producers in the region.

The largest producers of oil and gas in the region include Exxon Mobil, Shell, Anadarko, BP, Chevron Corp and ConocoPhillips.

* Shell Oil Co's 75,000 barrel-per-day Nakika crude oil pipeline and the oil platform was shut for two days late last week due to its proximity to the oil well, which began leaking when a rig exploded and sank in the Gulf last week. Nakika was restarted last week.

NATURAL GAS PRODUCTION

Three offshore natural gas production platforms have been shut due to the spill, unchanged from the weekend, according to the U.S. Coast Guard.

The Gulf of Mexico accounts for about 15 percent of natural gas production in the U.S.

SHIPPING, LIGHTERING

The U.S. Coast Guard said Tuesday it was inspecting inbound vessels for possible oil contamination, but that there has been no shipping disruption due to the spill.

Louisiana Offshore Oil Port (LOOP)

The LOOP, the only U.S. offshore oil port, receives between 1 million and 1.5 million barrels per day in foreign and domestic crude oil from tankers and via pipelines connected to offshore production platforms. There has been no impact on offloading operations so far, according to a spokeswoman.

Southwest Pass Lightering Area

The Southwest Pass lightering continued to operate normally, sources said. About 1 million barrels of crude are transported ashore daily from the Southwest Pass Lightering Area, near the Mississippi Delta in southern Louisiana.

LNG TERMINALS

U.S. liquefied natural gas terminals are all functioning normally. Cheniere's Sabine Pass, Sempra Energy's Cameron LNG and the Lake Charles terminals onshore Louisiana, and the Gulf Gateway terminal offshore Louisiana -- all west of the spill -- are currently unaffected.

(Sources: Reuters, U.S. Energy Information Administration, U.S. Mineral Management Service)

(Compiled by Rebekah Kebede; Reporting by Rebekah Kebede, Joshua Schneyer, Janet McGurty, Kristen Hays, Eileen Moustakis, Ed McAllister)