Borehole Drilling Curve Advice

Question

Which curve or VES is good for drilling?
Please see the attached images. 
Please advise me how to make my decision.

Anil Lalwani · Answer

In my opinion both the red and blue curve are positive, the red curve I feel is better as it indicates a zone of low resistivity at deeper levels too around 60-80 m and this place woudl probably have an unconfined system at a depth of 8-20 m and a confined system at about 60-80 m.  If it is a basement formation you probably will need to install casing down to 20 meters.

Dwight Hanson · Answer

The blue curve is smooth.  If the curve is not smooth they are hard to interpret.  The little bump in the curve at about 7 or 8 meters is likely the water table.  Where the curve rises at the end is probably fresh basement.

Dwight Hanson · Answer

Assuming you are in a Basement formation I would go with the blue curve.  It should be about 20 meters drilling depth.

Borehole Drilling Curve Advice

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