Map of Julia Creek for Then in December 1922, the Barroso well in the La Rosa Field in the Maracaibo Basin, which belonged to Shell, starting spewing 100,000 barrels per day, which marked the start of the oil boom in Venezuela. Soon, hundreds of foreign oil interests flocked to Venezuela. Gomez sold off concessions to his friends and family, who then resold them at great profit to the foreign oil companies. The Venezuelan oil boom transformed the country’s economy and society. In 1921, Venezuela produced 1.7 million barrels of oil. By 1929, the country produced 137 million barrels, making it second only to the United States. Map of Julia Creek 2016.