Don't panic, Nigerian governor says, as bank shake-out looms

* Crowded Nigerian banking sector under pressure

* Dollar loans stretching naira capital ratios

* Capital raising, mergers likely, analysts say

* Central bank urges depositors not to panic

By Chijioke Ohuocha and Ulf Laessing

LAGOS, July 29 (Reuters) - Breaking the central bankers' taboo on use of the 'p-word', Nigeria's Godwin Emefiele is urging people not to panic about the banking system, saying he is on top of any trouble resulting from the worst crisis in Africa's biggest economy for decades.

For now, depositors and investors are generally giving the Central Bank of Nigeria Governor the benefit of the doubt after he shored up mid-tier lender Skye Bank this month with a loan and replaced its management when its capital fell below levels required by regulators.

But pressure is building, with loan books - nearly half of them in dollars - hammered by a shrinking economy, a plunging currency and acute foreign exchange shortages, all a consequence of the slump in the oil price for Africa's top crude producer.

Non-performing loans are expected to jump to 12.5 percent of total loans this year, up from the central bank's target level of 5 percent at the end of last year, as lenders suffer a hangover from an oil sector credit boom that ended abruptly in 2015, according to Agusto & Co, Nigeria's main rating agency.

Nigeria's 21 banks have been laying off staff, closing branches and slashing earnings forecasts, but some are unlikely to survive the storm, analysts say.

"It will affect their profitability initially and eventually it is going to affect their liquidity and solvency," said Bismarck Rewane, chief executive of Lagos-based consultancy Financial Derivatives.

"Because of the squeeze in profitability there will be a natural consolidation and a shake out."

Any failure of the banking sector would have far-reaching consequences in the nation of 170 million, with civil servants' pay routed through the banks and residents of remote villages dependent on electronic systems for routine payments.

Sterling Bank chief executive Abubakar Suleiman said in February a naira drop of just 20 percent would trigger a "wave" of bank mergers. Since a devaluation last month, the currency has lost double that against the dollar.

Overall, 42 percent of loans extended by Nigerian banks are in dollars. If the naira falls far enough, it will force some banks to recapitalise to have enough naira to stay within financial stability limits.

"There is concern around the evolution of banks' capital adequacy if the naira continues to weaken," said Standard Chartered Africa chief economist Razia Khan. "As the naira weakens, FX loans are likely to be problematic."