22.4.14

The Processes Involved In Well Rehabilitation

By Essie Osborn


It is a common situation for water wells to lose their capacity or experience water quality problems that need fixing. One of the appropriate ways of dealing with such a situation is carrying out well rehabilitation. Generally, these problems result from fouling items that become deposited on the water surface. As a result, the wells may lose capacity while the water quality is also likely to deteriorate in odor and taste.

In some cases, the water becomes discolored while it can also be affected by bacteria. However, the well can still function properly if it is rehabilitated. This involves removing the deposits through rehabilitation treatment in order to keep the water clean. This also enhances the maintenance of gravel pack pore volume.

The restoration of water capacity and pore volume requires a proper rehabilitation procedure. This process is undertaken through incorporation of a number of techniques. However, the effectiveness of the technique adopted relies on adequate identification of the plugging substance and design of the chemical solvent. Generally, this process involves use of either chemical or physical treatment method.

Dissolving the plugging deposits involves a lot of work since they consist of complex particles of microbiological and geochemical structures. It is also demanding that one uses specific mixtures of chemicals for the process on a regular basis. Precautionary measures must be taken as well to ensure that the well is not damaged.

The common methods used in rehabilitation of wells include; jetting, application of chemicals, bore blast, aqua feed, sonar jet, dual swabbing and brushing. Chemical application usually requires the use of certain strategies that must consider the cause of the problem, construction design and formation type. It is mainly used for the removal of deposits, enhancing agitation and penetrating well formation.

Normally, brushing is considered a pre-treatment in the restoration process. It is used for removal of the byproducts of corrosion and mineral deposits. It opens up the screened area to allow penetration of the chemicals. Dual swabs, on the other hand, allow allocation of zones for placing chemicals. Additionally, it improves the agitation and energy level for dispersion of chemicals together with facilitating the reaction of acids and mineral deposits.

High pressure jetting can also be used for the opening of the screens. A sonar jet, however, assists in the removal of mineral deposits. A bore blast is also a crucial rehabilitation tool that is used to provide energy that initiates the breaking of the deposits in the well. It can also be used in collaboration with other chemicals.

One of the chemicals used for the rehabilitation of wells is the aqua feed. It is a liquid carbon (IV) oxide that when injected into the deposits expands to form a gas. It provides adequate energy for breaking the screens, formation and the gravel pack. Additionally, the aqua feed also speeds up the penetration of formation. Wisconsin residents can therefore ensure that they only take clean water by hiring the experts in the area to help them in restoration. The Internet can also come in handy when searching for such individuals as there are various sites online through which one can reach them.




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