近日，官方宣布BP在墨西哥湾沿岸的马孔多油田“死亡”，或已被水泥封闭。
BP's Macondo oil well off the gulf coast was officially declared to be "dead", or sealed by cement.
采用粗径岩心管、水泥封闭等方法在新生界松散层中人为叉孔有时效果不太明显。
The effect is not apparently when using methods of large-diameter barrels, cementation and so forth during branching drilling in Cenozoic loose beds.
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