LWD breakout data from hydrocarbon fields in the Norwegian North Sea

The data originates from LWD measurements (images, average caliper, and annulus pressure) conducted during the drilling of hydrocarbon wells in the Norwegian North Sea (data from the following fields are covered in the data set: Oseberg, Rolvsnes, Troll, and Valhall). The raw data of these LWD measurements can be obtained from the Diskos Well Database of the Norwegian Petroleum Directorate (https://www.npd.no/en/diskos/wells/). The data was used to analyze the relationship between drilling-related processes (e.g. tripping operations or shutting off the mud pumps) and the occurrence of borehole breakouts.

The first data set ("Overview_Breakout_Data.xlsx") gives comprehensive information about the breakouts identified in image logs. This includes information on the fields and wells the breakouts were obtained from. Additionally, information on the breakout geometry (depth extent, width, orientation), the number of tripping operations and pump shut-off events, and related pressure changes are given. In total, the data set includes information on 179 breakouts selected from data originating from ten wells in 4 hydrocarbon fields.

The second data set ("Data_Trips_Connections.xlsx") contains summarized information on the amount of tripping operations and pump shut-off events within and outside of breakouts. Furthermore, normalized information on the frequency of their occurrence is given (i.e. tripping operations per 100 m measured depth).