This is the 8487th most frequent Russian word.
нефтчалинском
The word "нефтчалинском" seems to relate to "Нефтчалинский," which is an adjective describing something pertaining to Neftchala, a region or town in Azerbaijan.
The word 'нефтчалинском' is an adjective derived from 'Нефтчала', a place name, and in this context, it describes the location of the district.
В нефтчалинском районе открыли новый завод.
A new factory was opened in the Neftchalinsky district.
Here, 'нефтчалинском' qualifies the region, indicating it pertains to the area associated with 'Нефтчала'.
Я хочу посетить музей в нефтчалинском регионе.
I want to visit a museum in the Neftchalinsky region.
In this sentence, 'нефтчалинском' describes the bay, specifying its location or connection to 'Нефтчала'.