palmares,
You may be able to get taken on as a copilot in Nigeria if you are Nigerian, but if not you'll need a few more hours as yet. Bristow in Nigeria take on a limited number of expatriates as SFOs but only whilst they are training up enough Nigerian pilots. Try and get another thousand hours or so and an IR if you can, then you could be considered out here. Without the IR you'd be confined to flying Bell 206/407 out of Escravos. You have two things working against you for Nigeria: most oil companies have fairly high minimum requirements for pilots flying on their contracts; Nigeria naturally wishes to see more of its own citizens trained as pilots so all the companies here are obliged to have training schemes to qualify national pilots and to give them priority. With the expansion of the helicopter industry in Nigeria it is likely to be quite a few more years before there are sufficient Nigerian pilots to satisfy demand, so don't give up hope, keep on building your hours and maybe a year or two down the road you'll have the required experience. Good luck.