document_title: Petroleum industry in Nigeria

token: Petroleum

token: industry

token: Nigeria

token: wikipedia

token: Jump

token: to

token: navigation

token: search

token: is

token: the

token: largest

token: oil

token: and

token: gas

token: producer

token: Africa

token: Crude

token: from

token: delta

token: basin

token: comes

token: two

token: types

token: light

token: comparatively

token: heavy

token: lighter

token: around

token: gravity

token: heavier

token: Both

token: are

token: paraffinic

token: low

token: sulfur

token: The

token: gates

token: of

token: refinery

token: Port

token: Harcourt

token: Contents

token: hide

token: History

token: exploration

token: Production

token: Offshore

token: Natural

token: Downstream

token: Current

token: manufacturing

token: politics

token: Colonial

token: legacy

token: Implications

token: causes

token: civil

question_text: in which regions are most of africa petroleum and natural gas found