Latex additives for gas migration control

After the cement is placed in the wellbore and has been left static, it begins to develop gel strength (gelation). In this state, the unset slurry cannot fully transmit hydrostatic pressure to the formation (loss of overbalance). The time period of gelation before cement sets can last for several hours (transition time). The loss of hydrostatic pressure allows gas to percolate through the unset cement. After the cement has fully hardened, these channels still exist and they constitute a permanent path for uncontrolled gas migration to the surface or other formation zones.

RF-9609 is a styrene latex which enhances the mechanical properties of forging cement and reduces the permeability of the cement matrix. It is especially recommended using same to design antimigratory slurries for gas wells. It is excellent aid for fluid-loss additives since this product allows users to get exceptionally low filters when it is used together with fluid-loss additives.