The Engineering Geological Map of the Sakha(Yakutia) Republic covers about 3 million kilometers which is one-fifth of th......

NV-3井所在区块属于亚极地海洋环境,年钻井时间窗口十分狭窄。该井在取心钻井时,面临取心段长、时间紧等困难。为提高NV-3井的取心......