A Survey on Efficiency of Different Upstream Contracts to Conservative Production from Gas-Condensate Reservoirs

Gas reservoirs are divided into two conventional and unconventional categories. The conventional gas reservoirs are containing dry, wet and condensate reservoirs. The condensate reservoirs enjoy a higher economic value for the gas condensate extracted with the products from natural gas field. Yet non conservative production from these sorts of reservoirs would make more serious harm, comparing with other conventional reservoirs. Considering the unique specifications of these sorts of reservoirs, we try to analyze the proficiency of conventional upstream contracts for conservative producing from these reservoirs, in this survey. Contracts are divided into two groups. First group are those which are efficient up to the beginning of the production step. Different forms of service contract, such as buyback contract models and EPC contract models are considered as this type. The second category of contracts that provide opportunity for oil companies operating in the production stage too. Iran new oil contracts as well as the production participating contracts are of these sorts.The results show that there is a contrast between safe keeping of principles and measures of conservative production from condensate gas reservoirs, and participant production contracts and buyback contracts.