Shape memory polymer (SMP) foam is being studied for use in downhole sand-management applications. The process involves machining the shape memory polymer into the desired final geometric shape profile. The shape profile is altered to the desired run-in profile. For reactive sand-management applications, the initial profile is a tubular shape with a diameter greater than the anticipated openhole diameter. The geometric shape is then altered to achieve the desired run-in diameter. When deployed downhole, the shape memory polymer must have good filtration characteristics and adequate permeability to provide efficient sand control without affecting well productivity. Foam permeability should be a minimum of 25 times greater than the formation permeability to minimize wellbore productivity risks. Filtration characteristics should prevent formation sand movement and have a minimal plugging risk.

During oil and gas production, the shape memory polymer provides an initial, minimal contact pressure to help stabilize the borehole. In the scenario of a collapsing wellbore, a dynamic strain test is needed to characterize the resulting effects on the permeability and filtration properties of this shape memory polymer. This paper discusses the development of a filtration test during dynamic loading, and presents the filtration results of shape memory polymer materials and conventional gravel pack techniques during dynamic strain loading.

You can access this article if you purchase or spend a download.