the different petroleum contracts, the evolution of the contract towards the cooperative contracts

the analyze of petroleum contracts demonstrate that in respect to the intensity of the cooperation between the state company and oil companies, we could find the different evaluative categories of the contracts on upstream oil industry.historically, the first generation of the petroleum contracts was the concession agreement in which the transferring of ownership was the base. the license agreement as a contract for transfer of the oil benefit was another category of the contract in the oil industry. in the historical evolution of the petroleum contracts, we realize the creation of the service contract which is, in fact, the result of national revolution in the oil countries. and actually, the sharing concept is replaced to the reciprocal concept in the petroleum contract and now the production sharing agreement is a predominant model in the oil industry in developing countries.