当前位置: X-MOL 学术Int. J. Greenh. Gas. Con. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Greenhouse gas emissions from marine decommissioned hydrocarbon wells: leakage detection, monitoring and mitigation strategies
International Journal of Greenhouse Gas Control ( IF 3.9 ) Pub Date : 2020-07-30 , DOI: 10.1016/j.ijggc.2020.103119
Christoph Böttner , Matthias Haeckel , Mark Schmidt , Christian Berndt , Lisa Vielstädte , Jakob A. Kutsch , Jens Karstens , Tim Weiß

Hydrocarbon gas emissions from with decommissioned wells are an underreported source of greenhouse gas emissions in oil and gas provinces. The associated emissions may partly counteract efforts to mitigate greenhouse gas emissions from fossil fuel infrastructure. We have developed an approach for assessing methane leakage from marine decommissioned wells based on a combination of existing regional industrial seismic and newly acquired hydroacoustic water column imaging data from the Central North Sea. Here, we present hydroacoustic data which show that 28 out of 43 investigated wells release gas from the seafloor into the water column. This gas release largely depends on the presence of shallow gas accumulations and their distance to the wells. The released gas is likely primarily biogenic methane from shallow sources. In the upper 1,000 m below the seabed, gas migration is likely focused along drilling-induced fractures around the borehole or through non-sealing barriers. Combining available direct measurements for methane release from marine decommissioned wells with our leakage analysis suggests that gas release from investigated decommissioned hydrocarbon wells is a major source of methane in the North Sea (0.9-3.7 [95% confidence interval = 0.7-4.2] kt yr−1 of CH4 for 1,792 wells in the UK sector of the Central North Sea). This means hydrocarbon gas emissions associated with marine hydrocarbon wells are not significant for the global greenhouse gas budget, but have to be considered when compiling regional methane budgets.



中文翻译:

海洋退役碳氢化合物井的温室气体排放量:泄漏检测,监测和缓解策略

在石油和天然气省中,退役井中产生的碳氢化合物气体排放是温室气体排放的漏报来源。相关的排放可能会部分抵消减轻化石燃料基础设施造成的温室气体排放的努力。我们结合现有的区域工业地震数据和新获得的来自北海中部的水声水柱成像数据,开发了一种评估海洋退役井中甲烷泄漏的方法。在这里,我们提供的水声数据表明,在43口调查的井中,有28口将气体从海底释放到水柱中。气体的释放很大程度上取决于浅层气藏的存在及其与井的距离。释放的气体可能主要是来自浅层来源的生物甲烷。在上方1 在海床下000 m处,天然气运移可能集中在钻孔引起的井眼周围裂缝或非密封屏障的作用下。将现有的海洋退役井中甲烷释放量的直接测量结果与我们的泄漏分析相结合,表明研究海底退役油气井中的气体释放量是北海甲烷的主要来源(0.9-3.7 [95%置信区间= 0.7-4.2] kt年中北海英国地区1,792口井的CH 4的-1)。这意味着与海洋碳氢化合物井相关的碳氢化合物气体排放量对于全球温室气体预算而言并不重要,但在编制区域甲烷预算时必须加以考虑。

更新日期:2020-07-30
down
wechat
bug