Method for assessing the performance of a drill bit configuration, and for comparing the performance of different drill bit configurations for drilling similar rock formations

摘要

There is disclosed herein a method for assessing the drilling performance of a drill bit configuration used to drill at least a portion of a wellbore in a formation, comprising: determining a value of at least one drill bit performance parameter at points along the wellbore, at least including at multiple points along an interval constituting at least part of the portion drilled using the drill bit configuration; determining rock characteristics for the interval; determining the drilling performance for said drill bit configuration in the interval based on the values for the drill bit performance parameter; and assessing the effectiveness of the drill bit configuration for drilling the interval based on the determined drilling performance and the determined rock characteristics. Also disclosed are related methods for comparing the performance of at least two different drill bit conf igurations; of designing a drill bit configuration for drilling at least part of a wellbore; for selecting a drill bit design for drilling at least part of a wellbore; and of well planning for drilling wells in a well field.