... of the scale inhibitor in complex wells using a combination of placement techniques such as crossflow balancing during shut in and diversion using wax, illustrates that the new inhibitor has demonstrated improved retention and desorption characteristics leading to longer squeeze lifetimes while highlighting...

... For the case of radial flow with barriers to crossflow, 4 - 7 , 9 the distance of penetration is roughly proportional to the square root of the permeability/porosity ratio for a given zone ( Table 1 ). Certainly, more viscous fluids penetrate to a greater extent than low viscosity fluids...

... of chemical squeeze treatments in heterogeneous wells and long reach horizontal wells has proved a significant challenge, with various factors including heterogeneity, crossflow and pressure gradients between otherwise non-communicating zones within the well, all contributing to an uneven placement...

... and 10:1 viscosity ratio were performed which demonstrated the importance of crossflow mechanisms in polymer flooding processes. The experiments were modelled using a curvilinear grid in a chemical flood simulator. All of the main features observed in these experiments were successfully reproduced...

... polymer oil recovery low permeability layer chemical degradation permeability layer incremental oil recovery crossflow polymer flood concentration upstream oil & gas reservoir mechanism degradation polymer flooding high permeability layer calculation injection chemical...

... the conclusions that have been drawn from this study are: 1. A low level of reservoir crossflow is conducive to a successful vertical conformance treatment; 2. The contrast in the permeability- thickness product of the reservoir layers is a useful parameter in identifying treatment candi- dates; 3. Vertical...