Nigeria Oil after Shell "Nigeria has had well-established problems in policy in the oil sector, and the FX policy concerns have put constraints on investments. That's probably partially why you have seen the majors pulling out, and disinvesting to some extent," said Andrew Matheny, senior economist with Goldman Sachs.
"It explains a significant portion of the decline in oil production in recent years."
Nigeria oil enters unclear new era after Shell's onshore asset sale (msn.com)
Could be another Venzuela in the making in term of oil production.