Sustainability

Gradual growth of incrustations during natural well ageing

Verlauf Brunnenleistung zu Betriebszeit

A 10 % decrease of yield can already be a sign of natural well ageing, thus its cause should be identified. Regular removals of soft incrustations at this stage lengthen the production time of the well virtually indefinitely - whereby the cost, time and effort are minimal.

Freier Porenquerschnitt. Langsame Verockerung, da kein Katalysator
At construction
Free pore space. Slow formation of Incrustations due to lack of catalyst.
Belag aus Eisenoxiden wirkt als Katalysator. Beschleunigte Verockerung
Natural Well ageing
Layer of iron oxides acts as a catalyst. Accelerated formation of incrustations.
 

Exponential growth of incrustations after an incomplete well rehabilitation

Verlauf Brunnenleistung zu Betriebszeit mit Regeneration

If a well rehabilitation is not fully completed the surface area of the remaining iron oxide incrustations becomes larger than before. The oxidization process increases due to the catalytic efficiency of iron(III), i.e. the well rehabilitation acts as a catalyst.

Belag aus Eisenoxiden wirkt als Katalysator. Beschleunigte Verockerung
Incomplete well rehabilitation
Open surface after an incomplete rehabilitation=activation of catalyst causing accelerated formation of incrustations
Belag aus Eisenoxiden wirkt als Katalysator. Beschleunigte Verockerung
Self-accelerating formation of
– thick incrustations
– pore space filled with iron oxides 
– tiny usable pore channels
 

The older and more crystalline incrustations become, the more time and cost intensive is their removal.