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井过程中采集的随钻测井（Logging While Drilling，简称LWD）数据，涵盖成像测井图像、平均井径及环空压力参数。数据集覆盖的油气田包括奥塞伯格（Oseberg）、罗夫斯内斯（Rolvsnes）、特罗尔（Troll）与瓦勒哈（Valhall）。
此类随钻测井原始数据可通过挪威石油理事会（Norwegian Petroleum Directorate）的Diskos井数据库获取，访问链接为：https://www.npd.no/en/diskos/wells/。
本数据集用于分析钻井相关作业（如起下钻作业或泥浆泵关停操作）与井壁垮塌（borehole breakouts）发生之间的关联规律。
首个数据集文件为"Overview_Breakout_Data.xlsx"，提供了成像测井中识别出的井壁垮塌的综合信息，包括垮塌所在的油气田与井眼信息。此外，该数据集还涵盖井壁垮塌几何参数（井深范围、宽度、方位角）、起下钻作业次数、泵关停事件次数及相关压力变化等内容。本数据集总计包含从4个油气田的10口井中筛选出的179处井壁垮塌相关信息。
第二个数据集文件为"Data_Trips_Connections.xlsx"，汇总了井壁垮塌发生时段与非时段内的起下钻作业及泵关停事件数量。此外，该数据集还提供了两类事件发生频率的归一化统计数据（即每100米测量井深对应的起下钻作业次数）。