Sargentes de la Lora is a municipality located in the province of Burgos, Castile and León, Spain. According to the 2004 census, the municipality has a population of 196 inhabitants.
In 1963, a petroleum reservoir was discovered in Ayoluengo de la Lora, a town of the municipality. Since 1964, 17 million oil barrels had been extracted. The reservoir had been exploited by Chevron Corporation, Repsol and Northern Petroleum.
Wikipedia https://en.wikipedia.org/wiki/Sargentes_de_la_Lora
Coordinates 42°46'8.197" N -3°52'19.737" E