Q: The values for some of the calculated parameters on the survey (such as dogleg severity) as calculated by PC-PUMP from the data I entered do not match the data on the survey sheet from the logging company. Why is this?

A: The most likely answer is that the data was not typed in correctly. Double-check all your input data. Is your copy clear?—we’ve seen some surveys that have been faxed several times and on these it is quite easy to misread numbers. If the data is all typed in correctly, it is possible that the logging company used a different calculation method. This is more likely if the survey is quite old. Most modern surveys will use the minimum curvature method, which is what PC-PUMP uses, but in older surveys (more than 15 years old) other methods are sometimes seen.

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