Asian spot prices for LNG rose to their highest since mid-2015 during the week of Dec. 5 as a deal by OPEC and Russia to cut crude oil output lifted the entire fuel complex, with winter weather in the Northern Hemisphere supporting gas markets.

Spot prices for Asian LNG rose by half a dollar from the week of Nov. 28 to about $8.1 per million British thermal units (MMBtu), their highest since July 2015.

Traders said the main price drivers were a deal between OPEC and non-OPEC producer Russia to cut crude output to prop up prices, as well as cold weather in northern Asia and Europe that lifted LNG demand for heating and power generation use.

"Higher oil prices translate into higher LNG import prices for the majority of LNG consumers," energy consultancy Wood Mackenzie said on Dec. 8 in a paper on OPEC's impact on LNG markets.

As about 80% of LNG supply is sold at prices linked to Brent crude oil, Wood Mackenzie said every $1 per barrel increase in Brent would bring an increase between $0.07/MMBtu and $0.15/MMBtu in contract LNG prices indexed to oil.

The other big price driver has been winter weather in the core consumers of northern Asia--Japan, South Korea and China.

Temperatures are particularly low in South Korea, where meteorological data in Thomson Reuters Eikon shows unusually cold conditions are expected to last into the second half of December.

South Korea's KOGAS, one of the world's biggest corporate buyers of LNG, issued a tender to buy two spot cargoes for arrival between December and February this week in order to meet the surprise winter demand.

The company's inventory levels are between 1.8 million and 1.9 million tonnes, only about 40% of total storage capacity at its four receiving terminals. KOGAS normally keeps its inventory levels at 50% ahead of the winter season.

Cold weather in the U.S. is also pushing up Asian spot LNG rates, as export prices from the Sabine Pass export project are linked to U.S. spot gas prices, which have risen by one-third since November to over $3.6 per MMBtu.