By some estimates, shale gas has more than tripled the lifespan of US gas reserves to more than 100 years and experts say there is similar potential in China.

一些估计数字显示，页岩气将美国天然气储量的可用期限延长了两倍以上，目前为超过100年。专家们表示，中国也有类似的潜力。

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Royal Dutch Shell plc (“Shell”) continues to build a leading portfolio in North America tight gas, with new positions in high potential US shale gas acreage, in the Marcellus and Eagle Ford plays.

荷兰皇家壳牌公司继续在北美致密天然气蕴藏资源中取得领先优势，在马塞卢斯和伊格福特区的油气成藏组合中新增高储量油气层。

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Sinopec is in talks with BP and Chevron about potential co-operation and Royal Dutch Shell has a deal with PetroChina to develop shale gas in southwestern China.

中石化(Sinopec)正在就可能的合作与英国石油(BP)和雪佛龙(Chevron)谈判，而皇家荷兰壳牌(Royal Dutch Shell)与中石油(PetroChina)已经签署协议，将开发中国西南地区的页岩。

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While Australia is the best part of 10-years behind the U.S. in terms of exploring for and developing its unconventional oil and gas potential it is a country which featured prominently in a 2011 analysis of world shale gas potential by the U.S. Energy Information Agency.

FORBES: Chevron Gets A Sniff Of Australian Shale Gas

But China likely has even more shale gas potential than the U.S., with the U.S. Energy Information Administration figuring on 1, 250 trillion cubic feet of recoverable shale gas in China.

FORBES: Gazprom Bows To Shale Boom, Cancels Shtokman Plans

Technically recoverable shale gas potential in Australia was put by the EIA at 390 trillion cubic feet of gas, about 45% of the 862tcf estimated for the U.S., but roughly double the estimate for France and Poland and 9-times the estimate for Ukraine which recently attracted an investment by Royal Dutch Shell.

FORBES: Chevron Gets A Sniff Of Australian Shale Gas