In the meantime, fracture developing frequency of Fuyu oil pay zone is analyzed and calculated by using ratio of vertical wave velocity - "crocodile factor" method.

Through analyzing the influences of information factors, measure of oil pay zone protection, injection, completion and fracture to improve development effects and enhance economic benefit.

In Lagos, foreign oil workers can pay as much as $65,000 per year in rent for a modest apartment in a safe part of town.