Abstracts

Integrating hydrogeology, well design and drilling techniques to maximize production and minimize problems

Author(s): Collier, H.

Constructing a water well that maximizes its production rate, efficiency, and lifespan requires integrating hydrogeology, well design, and drilling techniques. Unfortunately, this is not always the case. When engineering a well, it is critical that both the initial and final design be based on site specific geology. The initial well design should be based on a hydrogeologic study, with pilot or test hole data (e.g. geologic description of drill cuttings, sieve analyses, borehole geophysical logs, water analyses) used to finalize the well design.

Well specifications are a second critical component for successful well construction. They serve three functions: protect the client, assist the drilling contractor, and ensure a quality well. This talk will discuss items that should be included in well specs (e.g. drilling fluid properties, testing procedures, guarantees), along with case histories of what happens when they are deficient.

Daily, onsite monitoring throughout drilling and well construction is a third critical component. It serves the same three functions: protect the client, assist the drilling contractor, and ensure a quality well. A high capacity water well is a significant financial investment warranting professional, third party monitoring. Partnering with the drilling contractor minimizes problems and helps insure the success of the project. Case studies vouch for the wisdom of this approach.

An orchestration of hydrogeology, engineering design, and construction oversight is imperative to deliver to the client a well project that ensures quality construction and maximizes production and infrastructure lifespan.

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