I found this article. It sugest NG-prices will go up slowly, thoug I think the resent run up was pretty quick:) The henry hub future is now 4.71-4.81$ Maybe after it passed the 4.42$ point. Ok, the article:

The Henry Hub natural gas spot price ended trading on May 28, at $4.31 per million Btu (MMBtu), an increase of $0.09 or 2.1 percent over the previous session. Many analysts suggest that natural gas prices are historically low due to a supply surplus with last week’s production data lending support to this thesis.

Contrary to expectations of production declines because of a reduction in drilling activity last year, domestic marketed production remains strong at over 60 Bcf per day, according to estimates from BENTEK Energy Services. In particular, production increases have been recorded from unconventional gas fields including the Marcellus Shale in the Northeastern Appalachian region and the Haynesville Shale in Louisiana.

Overall supply levels during the report week were about 2.9 percent higher than last year. Front month gas prices are down more than 22 percent this year. For the week ended May 21, U.S. natural gas supplies stood at 2.3 trillion cubic feet, almost 16 percent above the five-year average.

Prices are expected to rise, initially pushed higher by increased gas demand for cooling, as Senior Meteorologist Joe Bastardi of AccuWeather.com predicted this summer to be the “hottest summer since 2005 for much of the nation” and later from increased demand in industrial and power generation.
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About Shell's acquisition:

The move into shale gas allows Shell to remain competitive with industry giant Exxon Mobil Corp. (NYSE:XOM), which in December paid $31 billion for XTO Energy Inc., the largest U.S. natural gas producer. Analysts expect the deal will increase Shell’s daily gas production by 7.5 percent.

Shale gas has offered the United States a greater energy supply with a smaller carbon footprint. It accounts for 15 to 20 percent of U.S. gas production, but that number is expected to grow to four times as much in coming years. The gas has attracted companies even when prices and energy demand were higher, so with technological advances in drilling capabilities it is even more compelling and easily attainable.

British Petroleum’s (NYSE:BP) Chief Executive Officer Tony Hayward has called shale gas a “complete game changer.” Earlier this year at the World Economic Forum Mr. Hayward said, “It probably transforms the US energy outlook for the next 100 years. It’s yet to be seen if it can be applied globally.”

http://gasinvestingnews.com/1301-gas-prices-to-increase-slowly.html