俄罗斯石油公司在北极大陆架进行地层钻井作业

    中国石化新闻网讯 据俄罗斯油气网2020年11月27日莫斯科报道，俄罗斯最大的石油公司俄罗斯石油公司（俄油/Rosneft）已是北极地质调查史上第一个在喀拉海北部钻取浅地层井的石油公司。这个地层钻井作业是在俄油的大规模地质调查远征中进行的。

    这个项目的主要任务是收集岩心样。岩心是一种有价值的岩石材料，是确定所研究的北极大陆架岩石的年龄(分层)、组成和形成条件所需的地质数据的直接来源。采集的岩心样对获得有关北卡拉盆地地质构造和油气潜力的最新数据非常有价值。

    俄油是北极大陆架许可证最大持有者。俄油时下正在北极实施一项全面的长期研究计划，包括地质、海洋、水文气象和环境研究。

    北卡拉盆地钻井作业是由“Bavenit号”地质调查船进行的，这是俄罗斯装备最齐全的地质调查船之一。在这次地层调查远征中，俄油完钻了8口井，井深90米。这是北极地区和俄罗斯大陆架最北端的第一批井。实地调查是在符合最高标准的环境安全和环境保护的情况下进行的。

    俄油在此次地层调查远征中总共取岩心样6.5吨，并在不同属性的矿床(如陆源岩石和碳酸盐岩石)以及在更具挑战性的分散和半岩心矿床中测试了钻井技术。专门设计的钻头用于岩石和半岩石地层。

    所采集的岩心样将借助于俄罗斯国家智力资源基金会（Innopraktika）和罗蒙诺索夫莫斯科国立大学地质学院进行实验室测试。一系列的分析研究将提高北极不同时代沉积盆地油气潜力预测的可靠性，并为北卡拉地区提供新的地质模型。

    调查远征期间获得的经验为开发有效研究北极大陆架的技术和在北极东部日益严峻的条件下继续这个项目提供了基础。

    李峻 编译自 俄罗斯油气网

    原文如下：

    Rosneft conducts stratigraphic drilling on Arctic shelf

    Rosneft has been the 1st in the history of Arctic surveys to drill shallow stratigraphic wells in the north of the Kara Sea. The work has been carried out during its vast research expedition.

    The project’s main task was to collect core samples. The core is a valuable rock material, a direct source of geological data required to determine the age (stratification), composition and conditions of formation for Arctic shelf rocks under research. The samples recovered are of great interest for the purpose of obtaining the latest data on the geological structure and oil and gas potential of the North-Kara basin.

    Rosneft is the largest license holder for continental shelf areas. The company is implementing a comprehensive long-term research programme in the Arctic, which includes geological, oceanological, hydrometeorological and environmental studies.

    The North-Kara drilling was performed with the Bavenit survey drill ship, one of the most equipped vessels in Russia. During the expedition, 8 wells were drilled to a depth of 90 m. Those were the 1st in the region and the northernmost on the Russian shelf. The fieldwork was carried out in compliance with the highest standards of environmental safety and environmental protection.

    In total, 6.5 tonnes of core were sampled, and the drilling technology was tested in deposits with varying properties, such as rocky terrigenous and carbonate ones, as well as in more challenging dispersion and semi-core deposits. Specially designed drill bits were used for rocky and semi-rocky formations.

    The core samples taken will be lab-tested by means of Innopraktika and the Lomonosov Moscow State University Faculty of Geology. A series of analytical studies will improve the reliability of forecasts of the oil and gas potential of the Arctic’s sedimentary basins of varying ages and provide a new geological model of the North-Kara region.

    The experience gained during the expedition provides the basis to develop technologies for effective study of the Arctic shelf and to continue the project in the increasingly severe conditions of the Eastern Arctic.