Final answer:
Wireline well-logs were invented in Baku, Azerbaijan on the Apsheron Peninsula on the west side of the Caspian Sea.
Step-by-step explanation:
Wireline well-logs were invented in Baku, Azerbaijan on the Apsheron Peninsula on the west side of the Caspian Sea. One of the early pioneers in drilling and refining oil, the Russian Empire took back the lead in production by the end of the 19th century. Commercial oil production was also taking place in other locations such as Texas, California, and Ohio in the U.S., as well as Sumatra, Persia, Peru, Venezuela, and Mexico.