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The oil and gas industry operates in countries throughout the world in accordance with a number of different types of agreements. These agreements generally fall into one of four categories (or a combination of the categories): risk agreements, concessions, production sharing agreements (PSAs, also known as production sharing contracts, PSCs) and service contracts. Traditional concession agreements pre-1940 were granted for large areas, sometimes the whole country e.g. Iraq. Those grants were for long term (50 to 99 years). The IOC had full discretion and control to explore and whether or not to develop a particular field. This caused developments to be delayed, postponed or the expected investment did not immediately materialise. This was clear agains host governments interest. The contracts did not foreseen any relinquishment of non explored areas. Further more traditional concession agreements granted petroleum "in situ" to the IOC, with market and pricing powers. The royalties were flat or fixed for per unity rates and sometimes credited against income taxes. There were no or low signature bonus and sometimes no income taxation. Those terms were often "frozen" for the life of the agreement. After the second World War host governments relocated economic rents with the aim of increasing passive profit sharing. Towards the 60's and 70's Governments started to demand more active profit sharing through NOC Joint Ventures Participation. Participation Agreements: the NOC is "Carried" by an International Oil Company (IOC). The NOC burdens the IOC by not fully compensate the IOC for the risks assumed during exploration or to make a commercial discovery. The IOC faces the full losses and thus needs bigger success to compensate depending on NOC's share on the Joint Venture. However the International Oil Company benefit for example by having the NOC as partner whenfaced with nationalistic treats. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Oil and gas agreement」の詳細全文を読む スポンサード リンク
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