Aggreko says recovery in N.America power market some way off

* H1 trading profit 77 mln stg, below some forecasts

* Oil needs to be higher to boost N.America energy market

* Shares (Berlin: DI6.BE - news) drop 15 percent (Adds CEO, analyst comments, share movement)

By Esha Vaish

Aug 3 (Reuters) - Temporary power provider Aggreko (EUREX: AGKF.EX - news) said oil prices needed to be higher for longer to drive a recovery in its business with North American oil and gas customers, as it posted first-half profits that missed some analysts' forecasts.

While crude prices have recovered from January lows, Aggreko CEO Chris Weston said North American shale companies were so far largely restarting projects by using power grids rather than the sort of temporary supplies provided by his company.

"The oil price needs to be a little bit higher and higher for a reasonable period of time, 3-6 months, before you begin to see more drilling and production activity in areas where there is no power and therefore they need our services," he told reporters on Wednesday.

The world's largest listed temporary power provider posted a trading profit of 77 million pounds ($103 million) for the six months ended June 30, which two analysts said was below the consensus estimate of around 85 million pounds.

Aggreko (LSE: AGK.L - news) shares fell as much as 15 percent, the biggest percentage fall on London's FTSE midcap index.

Citing North America weakness and geopolitical tensions in other markets, Aggreko reiterated full-year pretax profit before exceptional items would be slightly lower than in 2015. The forecast banks on Aggreko winning extensions on contracts in Argentina, Venezuela and Yemen.

Jefferies analysts said the guidance looked a stretch given it factored in an uptick in North America as well as success on all three contracts.

Aggreko was not expecting to deploy any power for the Olympic Games in Rio de Janeiro this year, Weston said, after it withdrew from the tender process to supply generators in December.

The company also said it had not yet engaged with the UK government over Britain's potential power needs after Prime Minister Theresa May decided to review plans to build a nuclear plant in southwest England.

"Of course, if the crunch came and they needed power quickly we would respond," Weston said. (Reporting by Esha Vaish in Bengaluru; Editing by Gopakumar Warrier and Mark Potter)