Assuming GOR means Gas, Oil, Reserves then you read me right.
GOR stands for Gas-Oil-Ratio. It quantifies the amount of natural gas contained within oil under in-situ conditions. When pressure is released and the temperatures changes, the gas comes out of solution and results in an amount of gas for a given amount of oil. Oils in the reservoir are named as undersaturated and saturated depending on whether or not they contain as much gas as they can, or not. Once an oil is saturated under a given set of conditions, buoyancy allows "free gas" to form a cap on top of the oil column, the oil no longer able to absorb any more.
william the wie said:Coal seams that are too expensive to mine for coal generally are cheap enough to drill for natural gas. In Russia as in the US too expensive to mine coal fields have been used as gas fields for a long time. But in Russia because of latitude, size and poorer logistical endowment a much higher percentage of coal fields fall into to the too expensive to mine but not too expensive to use as gas fields category. Australia for example uses the same technique, primarily to make coal mining cheaper and safer and then found that it had a lot of NG and other gases that they need a market for.
China does it as well. Quite extensively as a matter of fact. But gas in coal seams isn't the issue when discussing where most of the natural gas from Russia comes from (conventional gas fields).