This is the 5195th most frequent Russian word.
нефтяном
The Russian word "нефтяном" means "oil" or "petroleum" (adjectival form).
In this sentence, 'нефтяным' is used as an adjective meaning 'related to oil.' It describes the type of industry of the center, emphasizing its connection to oil-related activities.
Этот город является крупным нефтяным центром.
This city is a major oil industry center.
Here, 'нефтяному' serves as an adjective modifying 'производству' (production), indicating the specific context of the production being related to oil.
Мы посетили выставку, посвященную нефтяному производству.
We attended an exhibition dedicated to oil production.
'нефтяном' is used to qualify 'месторождении' (field), specifying that the field in question is related to oil extraction or exploration.