The new scenario for offshore development in Brazil includes heavy oil fields in ultra deepwaters where 1000 m to 2000 m horizontal section wells are economical drives for field development. Such well geometry would assure effective reservoir drainage to maintain a reasonable productivity index of a heavy oil field.
In such wells, mainly in low frac gradient scenarios, it is known that the dynamic pressures during gravel-packing operations can easily overcome formation frac pressure. In order to accomplish this task and avoid formation damage, a new approach has been proposed. During the beta wave stage, where a large pressure growth is observed, a lightweight proppant would be pumped.
This article shows the computational simulations used to design this gravel-packing operation with two different proppants, in order to enable the completion of such wells.