The oil production optimization involves a multidisciplinary expert team to draw up development plans to oil field, making strategic and operational decisions considering possible alternatives. The decisions seek to increase the oil recovery and the net present value of the project. This fact highlights the need to build a robust support tool that allows experts to make better and fast decisions.

This paper describes optimization of reservoir devopment plan using a computer system, called OCTOPUS. The OCTOPUS system was created to assist the experts in drawing up reservoir development plans, for that the system is composed by some subsystems responsible for otimize specifically tasks in reservoir development, involving the oil production strategy. These subsystems are related with 1) the optimization of the number, location, type and trajectory of wells, 2) wells open scheduling and 3) location and sizing of stationary production units. This paper is focused on the first subsystem described, considering the allocation of wells.

This support system has been applied to a synthetic reservoir model based on the Namorado field, Campos basin, Brazil. The objective of the study cases is to take decision regarding exploitation strategy selection in initial stage of an offshore oil field. We consider three cases that require for well placement: case 1, that already has 4 well pre-allocated that shoud be considered in time to allocate more wells; case 2, that has no wells previously allocated and has producers and water and gas injectors available to be allocated; and case 3, that also has no wells previously allocated but has producers and water injectors well to be allocated. The results compare the placement plans for all the cases considered showing the possible gains between then, comparing the net present value and also the cumulative production.

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