Emmel Benjamin, Dupuy Bastien
SINTEF Industry, Applied Geoscience Group, P. O. Box 4763 Torgarden, 7465 Trondheim, Norway.
Data Brief. 2021 May 25;37:107165. doi: 10.1016/j.dib.2021.107165. eCollection 2021 Aug.
More than 750 wildcat wells have been drilled in the Norwegian North Sea since 1966. Some of these wells could pose a risk for the environment, climate, and future CO and hydrogen storage projects by being potential leakage pathways for subsurface gases (mainly CH and stored CO and hydrogen). To ensure well integrity, these wells were secured by building cement plugs at crucial positions in the well path before abandoning the well. However, first 2004 the NORSOK d-010 standard defined strict regulation for plugging and abandonment (P&A) of gas and oil wells along the Norwegian continental margin. Here we report data relevant for the quality of a P&A work done on old exploration wells (1979 to 2003) from the Troll gas and oil field in the Norwegian North Sea. The data was extracted from public available well completion reports and the webpage of the Norwegian Petroleum Directorate. The dataset was analysed regarding their availability, plausibility and evaluated towards the present P&A regulations for offshore Norway. Based on twelve single criteria a final P&A score for 31 exploration wells was established, which may be applied to other abandoned wells in the Norwegian North Sea for further analyses. The resulting scores vary from -1 to 23.67 whereby lowest scores indicate wells where monitoring would be recommended. A P&A work evaluation is especially relevant in the Troll area as Norwegian large-scale CO storage is planned close to this location.
自1966年以来，挪威北海已钻探了750多口野猫井。其中一些井可能对环境、气候以及未来的二氧化碳和氢气储存项目构成风险，因为它们可能成为地下气体（主要是甲烷以及储存的二氧化碳和氢气）的潜在泄漏通道。为确保井的完整性，在弃井前，通过在井筒关键位置设置水泥塞来保障这些井的安全。然而，直到2004年，挪威石油工业标准NORSOK d - 010才对挪威大陆架油气井的封堵和弃井（P&A）制定了严格规定。在此，我们报告了与挪威北海特罗尔气田老勘探井（1979年至2003年）封堵和弃井工作质量相关的数据。这些数据摘自公开的完井报告以及挪威石油管理局的网页。对该数据集的可用性、合理性进行了分析，并对照挪威近海目前的封堵和弃井规定进行了评估。基于12个单一标准，确定了31口勘探井的最终封堵和弃井分数，该分数可应用于挪威北海其他废弃井的进一步分析。所得分数在 -1至23.67之间，分数越低表明越建议对这些井进行监测。在特罗尔地区，封堵和弃井工作评估尤为重要，因为挪威计划在该地区附近进行大规模的二氧化碳储存。
