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).

本数据集源自挪威北海油气井钻探期间采集的随钻测井（Logging While Drilling, LWD）测量数据，涵盖图像、平均井径及环空压力数据。数据集覆盖的油气田包括：奥塞伯格（Oseberg）、罗尔夫斯尼斯（Rolvsnes）、特罗尔（Troll）及瓦勒哈勒（Valhall）。上述随钻测井原始数据可从挪威石油理事会（Norwegian Petroleum Directorate）的Diskos井数据库获取（https://www.npd.no/en/diskos/wells/）。本数据集用于分析钻井作业流程（如起下钻作业或关停泥浆泵）与井壁坍塌（borehole breakouts）发生之间的关联。
首个数据集（"Overview_Breakout_Data.xlsx"）提供了图像测井中识别出的井壁坍塌的综合信息，涵盖坍塌所在油气田及井眼信息。此外，该数据集还包含井壁坍塌几何参数（井深范围、宽度、方位）、起下钻作业次数、泵关停事件次数及相关压力变化等信息。本数据集总计包含从4个油气田的10口井中筛选出的179处井壁坍塌相关信息。
第二个数据集（"Data_Trips_Connections.xlsx"）汇总了井壁坍塌发生时段内外的起下钻作业与泵关停事件数量信息。此外，还提供了其发生频率的归一化统计数据（即每100米实测深度对应的起下钻作业次数）。