Optimising Water Bore Performance
When it comes to maximising the production capacity of your water bore, a crucial step is bore development. This process utilises a combination of techniques, including the use of specialised chemicals and mechanical agitation of the bore screen and the surrounding aquifer.
One of the most commonly employed techniques is known as “Air Development” or air-lifting agitation. This method is highly effective in enhancing bore performance. One of the key chemicals used in this process is AMC WELLCLEAN™. This product is specifically designed for bore development and cleanup, particularly in cases where bentonite-based mud has been used during drilling. AMC WELLCLEAN™ excels at breaking down the viscosity of bentonite mud and dispersing any wall cake that may have formed within the drill hole. This promotes a rapid and efficient cleanup.
Water bore air development primarily focuses on removing clay and silt particles introduced during the drilling process, as well as finer materials from the aquifer surrounding the bore screen. This ensures the bore is in optimal condition before being put into service. The process involves injecting compressed air into the water bore to lift the water. Once the water reaches the top of the casing, the air supply is shut off, causing the aerated water column to descend. This cycle alternates with periodic air supply to continuously pump sediment from the water bore.
Development efforts should persist until the discharge water runs clear, and all fine materials from both the water bore and the adjacent aquifer have been effectively eliminated. Chemical methods may also be employed, utilising dispersants and detergents to wet, break down, and facilitate the removal of clayey materials and fines from the formation. Final development often involves mechanical means.
In addition to enhancing bore production capacity, bore development serves to stabilise the formation. The formation acts as a natural filter, preventing the pumping of sand, which could otherwise lead to severe damage to pumps and fittings. In most formations, the application of appropriate development techniques will result in a virtually sand-free or silt-free bore. In cases where the aquifer material is exceptionally fine, a compromise may be necessary to achieve an acceptable flow rate while maintaining a relatively sand-free water supply.
Investing in bore development is not just about optimising production; it’s about ensuring the longevity and reliability of your water bore system.