Characterize every blend
Analyze source and produced waters and calculate the planned blend window.
Test normal and difficult chemistry.
Track residual treatment chemicals
Record biocide, scale control, corrosion control and clarification carryover.
Residual additives may alter inversion or polymer extension.
Preserve solids and oil context
Document filtration, turbidity, oil and storage history.
A clean decanted sample may not represent field water.
Run matched pressure tests
Keep loop, flow, temperature and timing identical across candidates.
Compare early and final response.
Review operating consequences
Check screens, filters, deposits and pumpability with pressure reduction.
Water reuse requires a system decision.
Define recheck triggers
Repeat after water source, blend, treatment or product changes.
Retain analyses with the approved sample.