Department of Geosciences, UiT The Arctic University of Norway in Tromsø, Postboks 6050 Langnes, N-9037 Tromsø, Norway.
Department of Geosciences, UiT The Arctic University of Norway in Tromsø, Postboks 6050 Langnes, N-9037 Tromsø, Norway.
Mar Pollut Bull. 2018 Oct;135:224-238. doi: 10.1016/j.marpolbul.2018.06.064. Epub 2018 Jul 14.
Five stations (≤250 m from the well heads) from three exploration wells of different ages from the SW Barents Sea were studied to investigate the spreading of drill cuttings and sediment quality. Two of the wells were drilled before the restriction of use of oil-based drilling fluids (1993). Elevated concentrations of Ba were found in sediments near all the wells with the highest concentrations at ≤60 m from the well head. The thickness of drill cutting layers was between >20 cm (well head) and 2 cm (250 m from the well head). The sediment quality varied from very bad (oldest well) to background (normal) (newer wells). Regulations led to better sediment quality. Metal concentrations from the oldest well suggested that the top 4 cm of the core represents sediment recovery. However, Ba concentrations of the top sediment layer at all the stations of the three wells indicate no physical recovery.
研究了来自 SW 巴伦支海的三口不同年代勘探井的五个站位（距井口≤250m），以调查钻屑的扩散和沉积物质量。其中两口井是在限制使用油基钻井液之前（1993 年）钻的。在所有有井的地方都发现了高浓度的钡，在距井口≤60m 的地方浓度最高。钻屑层的厚度在＞20cm（井口）和 2cm（距井口 250m）之间。沉积物质量从很差（最老的井）到背景（正常）（较新的井）不等。规定导致沉积物质量更好。最老井的金属浓度表明，岩芯的前 4cm 代表了沉积物的恢复。然而，所有三口井的所有站位的表层沉积物中的钡浓度表明没有物理恢复。
