Validating critical assumptions with detailed laboratory study under controlled conditions is paramount to proving a concept in any scientific discipline. The evolving science of drillbit geomechanics, that is measurements of elastic rock properties taken at or near the drillbit via high-frequency accelerometers, requires several fundamental assumptions: 1) measured elastic rock properties are not a function of varying drilling parameters, for example weight on bit (WOB) or revolutions per minute (RPM); 2) measured forces and forces from accelerations are linear regardless of bit type, drilling conditions, and lithology; 3) scalar values for one rock type can be used to estimate the calculated rock properties for another rock type using the same bottom hole assembly (BHA). In this study we explored and ultimately validated these concepts using numerous controlled drilling tests on large rock blocks. These findings can be taken from the lab to the field to help E&P companies make informed drilling and completions decisions.
Presentation Date: Tuesday, October 16, 2018
Start Time: 1:50:00 PM
Location: 212A (Anaheim Convention Center)
Presentation Type: Oral
