What is nonionic polyacrylamide (NPAM) gel?

Nonionic polyacrylamide (NPAM) gel was prepared for in-depth profile control. A compact three dimensional network structure was formed in the bulk gel system. Retention, adsorption and bridging across the pore throats occur in high permeability zones. The NPAM gel shows superior high temperature resistant. °C.

What is nonionic polyacrylamide?

Nonionic polyacrylamide is homopolymer formed of acrylamide, with high purity, good soEubility. high molecular weight. This series of products are with high molecular weight polymer and liner polymer low ion degree. Because of its special groups, and endow it with flocculation and dispersion, thickening and bonding. film. gel. stable colloidal.

How do you control NPAM gel strength?

The gelation time and gel strength of the NPAM gel can be controlled by adjusting the NAPM polymer or cross-linker concentration. The adjusted gelation time ensures that the gel system enters the in-depth formation, whereas the controllable gel strength gives the gel system enough strength to plug high permeability zones.

Can NPAM gel plug high permeability sand-packs?

The results indicate that injecting NPAM gel can effectively plug high permeability sand-packs and improve the formation profile. When the NPAM gel solution was injected into sand-packs, the solution preferentially entered the high permeability zones. This can be attributed to the selective plugging capacity of the gel.

Are bulk gels based on NPAM suitable for profile control technology?

However, no systematic study has been done for the gelation performance and microstructure of bulk gels under hydrated conditions and in porous media. So in this research, we focused on the gels based on NPAM for in-depth profile control technology.

What is the difference between NPAM gel and controllable gel?

The adjusted gelation time ensures that the gel system enters the in-depth formation, whereas the controllable gel strength gives the gel system enough strength to plug high permeability zones. The NPAM gel has good shearing stability and thermal stability which can be cross-linked in high salinity and temperature reservoirs.