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亚洲最深科学钻探井完井 松科二井入地7018米

2018-05-27 09:06:03   央广网

原标题:松科二井入地7018米 亚洲最深科学钻探井完井

26日,在黑龙江省安达市,松辽盆地大陆深部科学钻探工程即松科二井超额完成预定目标,胜利完井。该成果总体达到国际先进水平,在深部钻探技术和白垩纪陆相古气候研究方面达到国际领先水平。

松科二井于2014年4月13日开钻,历时4年多时间,完钻井深7018米,成为亚洲国家实施的最深大陆科学钻井和国际大陆科学钻探计划(ICDP)成立22年来实施的最深钻井。工程取得了地质科技四项重大突破与进展。

一是创造了深部钻探技术四项世界纪录,实现了两项重大突破。创造了311毫米大口径连续取心最长、三种不同口径单回次取心最长四项世界纪录。在世界上首次研发并成功应用大口径一次取心成井等技术。成功研发抗高温钻探技术,创造国内最高温度(241℃)条件下钻进的新纪录。

二是发现了松辽盆地深部页岩气和地热能两种清洁低碳能源具有良好的勘探开发前景。在盆地深部断陷沙河子组和火石岭组(3350米以深)地层中发现页岩气气测异常43层,累计厚度102米,甲烷占全烃组分平均含量的86%。在井深4400米—7018米发现150℃—240℃高温干热岩体和2层含高放射性元素铀异常地层。

三是获得了白垩纪陆地古气候演变规律的三项重要证据。首次在全球实现了对白垩纪(距今1.45亿到0.65亿年)最完整、最连续陆相地层厘米级高分辨率的精细刻画,首次重建了白垩纪陆相百万年至十万年尺度气候演化历史,发现了大规模火山爆发排放二氧化碳引发陆相气候剧烈波动的重要信息。

四是取得了基础地质研究三项重大进展。建立了松辽盆地陆相地层标准剖面——“金柱子”,构建了盆地早期基底双向汇聚、后期伸展反转的陆内盆地演化新机制,提出了多期海侵事件造成盆地有机质更加富集的新认识。(记者常钦)

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