B-b,
SAS is right. A lot depends on your experience level, which you haven't mentioned. A lot of new hires are going to Nigeria, but experience will determine whether you're offered a Captain, SFO or FO positio.
Pay and allowances differ from one country to another, but Nigeria will probably probably have the highest allowances right now. If you do come to Nigeria, they presently operate AS332L, S76 A++/C+/C++, Bell 206/407/412 SP & EP, EC155B out of a number of bases in the south of the country for a number of oil majors including Shell, Chevron and Exxon Mobil and another company not so welll known outside of Nigeria, Addax.
Benefits usually include health insurance, a contributory pension scheme and life insurance. If you are offered work in Nigeria, as SAS says your contract will be with British Island Airways Guernsey and you'll be paid in US$.