Tailored polymers for a wide range of field conditions
To ensure optimal injectivity and sweep efficiency, we focus on four key field conditions:
- reservoir temperature
- divalent ion concentration
- salinity of injection and formation fluids, and
- reservoir permeability.
Salinity and divalent ion concentration of injection and formation fluids along with reservoir temperatures affect the viscosity and stability of the solution. Harsher conditions typically require sulphonated polymers. Molecular weight selection is driven by reservoir permeability range.
| Product | Molecular weight | Sulphonation | Temperature | Salinity |
|---|---|---|---|---|
| KemSweep A-5257 | Low | None | Low – high * | Low |
| KemSweep A-5271 | Medium | None | Low – high * | Low |
| KemSweep A-5265 | High | None | Low – high * | Low |
| KemSweep A-5365 | Very high | None | Low – high * | Low |
| KemSweep A-6000 | Ultra high | None | Low – high * | Low |
| KemSweep A-5300 series | Low – high | Low – medium | Low | High |
| KemSweep A-5900 series | Low – high | Low – high | High | High |
| KemSweep A-5291 | Medium | Very high | High | High |
* Suitable for high-temperature reservoirs in the absence of divalent ions.