UPDATE 1-Prosafe Q1 falls as f'cast, says market balanced

* Q1 EBIT falls 10 pct to $38 mln, meets forecasts

* Declares Q1 dividend of 0.30 crowns per share

* Says accommodation rig market balanced, Mexico "robust"

* Shares off 0.3 pct on rising Oslo market

(Adds quotes, details, shares)

OSLO, May 15 (Reuters) - Norwegian oilfield services group Prosafe (PRSO.OL) posted a drop in first-quarter profit in line with forecasts on Friday and said it saw good supply-demand balance in its accommodation rig market.

Operating profit fell to $38 million in January-March from $42 million a year earlier, in line with an average forecast in a Reuters poll of 13 analysts, and in keeping with many of its oil services sector peers as oil prices fell.

"We expect a good long-term demand for semi-submersible accommodation rigs, especially in mature regions, with growth potential in deepwater regions," said Prosafe, which owns 12 accommodation rigs or "flotels" for workers on offshore fields.

Prosafe declared a 0.30 crown per share quarterly dividend.

Five of its rigs are offshore Mexico, where Prosafe said the market for semi-submersible accommodation rigs "remains robust".

"Within the harsh and semi-harsh offshore environments where Prosafe's accommodation rigs operate, there is a good supply-demand balance and the number of newbuilds to be delivered over the next few years is limited," it said.

Shares in Prosafe were off 0.3 percent to 29.70 crowns at 0703 GMT, against a 1.1 percent rise on Oslo's index .OSEBX. (Reporting by Wojciech Moskwa and John Acher, editing by Will Waterman)