PAM cost savings should be calculated from site records rather than assumed from another facility's headline percentage. The relevant comparison is the total cost of meeting the same treatment objective on comparable water. A lower polymer dose is useful only if outlet quality, solids handling and plant availability remain acceptable.
Establish a comparable baseline
Record treated volume, water source, inlet solids, oil loading where relevant, commercial chemical use and operating hours. Include the incumbent coagulant and polymer rather than isolating one reagent. Note changes in throughput and downtime. A trial on easier feed cannot demonstrate savings against a baseline collected during an upset.
Calculate the chemical component
Multiply actual commercial product consumption by delivered unit cost. If consumption is estimated from pump settings, verify calibration and reconcile it with stock movement. State preparation concentration and active content only where those conversions are needed. Avoid combining active kilograms for one product with commercial kilograms for another.
For an illustrative arithmetic example, 10 kg of product at 3 currency units per kilogram costs 30 units. A candidate consuming 8 kg at 4 units costs 32 units, so the chemical line alone is higher. It could still be worthwhile if independently measured downstream savings exceed the difference. These numbers are not product prices or field results.
Evaluate the downstream balance
Measure cake or sludge quantity, dry solids, transport charges and relevant filter-cleaning costs. Separate fixed costs from costs that genuinely change. A reduction in wet sludge does not automatically reduce the number of paid collections if transport is scheduled or minimum charges apply. Likewise, a longer press cycle is not necessarily an improvement; compare solids throughput and final cake quality.
Make the decision auditable
Keep the raw measurements and identify uncertain assumptions. Obtain trial candidates and preparation details from Xinqi Polymer, with cationic PAM considered where sludge testing supports it. Approve a product only after the whole operating balance is acceptable. Report the result as a finding for the tested conditions, not as a guaranteed savings percentage for every Permian facility.