Kromebacher, thx for your determined efforts.
Let's not lose this little tidbit of information, specifically, " analysis-while-drilling and researching on post-drilling reserve appraisal. "
Yep, the words appraisal well, caught me right between the chops.
The only other well that would ring the bell louder would be an " production well ".
Let's peruse some definitions of an appraisal well, shall we ??
Appraisal well
A well drilled to determine the extent and scope of a petroleum find.
Glossary
Appraisal Well: Well drilled after the discovery of oil or gas to establish the limits of the reservoir, the productivity of wells in it and the properties of the oil or gas. See also development well.
Tighten the seat belt !!
Red