The government forced foreign companies to sign the contracts - of which 37 are for production and seven for exploration - to give the state a larger take of hydrocarbons assets as part of President Evo Morales' nationalization program.
"The companies carrying out exploration work at the moment are Pluspetrol, Chaco, Vintage and Repsol and they are even sending out additional gas volumes," government news agency ABI quoted Villegas as saying.
The new contracts came into effect on May 2 and the companies have until end-August to migrate to the new contracts or face the rescinding of their contracts.
Bolivia's hydrocarbons ministry expects income for the country as a result of the new contracts to reach US$2 billion in 2007, up from US$1.30 billion last year, BNamericas reported previously.
Visit BNamericas to access our real-time news reports, 10-year archive, Fact File company database, and latest research reports. Click here for a Free two week trial to our Latin America Oil & Gas information service.
Most Popular Articles
From the Career Center
Jobs that may interest you