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Studies on Marine Oil Spills and Their Ecological Damage 被引量:6
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作者 MEI Hong YIN Yanjie 《Journal of Ocean University of China》 SCIE CAS 2009年第3期312-316,共5页
The sources of marine oil spills are mainly from accidents of marine oil tankers or freighters, marine oil-drilling platforms, marine oil pipelines, marine oilfields, terrestrial pollution, oil-bearing atmosphere, and... The sources of marine oil spills are mainly from accidents of marine oil tankers or freighters, marine oil-drilling platforms, marine oil pipelines, marine oilfields, terrestrial pollution, oil-bearing atmosphere, and offshore oil production equipment. It is concluded upon analysis that there are two main reasons for marine oil spills: (I) The motive for huge economic benefits of oil industry owners and oil shipping agents far surpasses their sense of ecological risks. (II) Marine ecological safety has not become the main concern of national security. Oil spills are disasters because humans spare no efforts to get economic benefits from oil. The present paper draws another conclusion that marine ecological damage caused by oil spills can be roughly divided into two categories: damage to marine resource value (direct value) and damage to marine ecosystem service value (indirect value). Marine oil spills cause damage to marine biological, fishery, seawater, tourism and mineral resources to various extents, which contributes to the lower quality and value of marine resources. 展开更多
关键词 marine oil spills ecological damage marine ecological safety damage to marine resource value damage to marine ecosystem service value
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大直径地面钻井井身稳定特性分析及工程控制 被引量:3
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作者 苏海 刘应科 +1 位作者 何宇雄 李海鉴 《煤矿安全》 CAS 北大核心 2015年第11期189-192,共4页
高强度开采条件下地面钻井受剧烈采动影响易破坏失效,运用有限差分程序FLAC3D对采动条件下不同直径钻井套管的受力进行了模拟计算,结果表明岩层分界面处套管变形较大,套管直径越大其变形和承受应力更小,钻井直径加大失效的风险降低。针... 高强度开采条件下地面钻井受剧烈采动影响易破坏失效,运用有限差分程序FLAC3D对采动条件下不同直径钻井套管的受力进行了模拟计算,结果表明岩层分界面处套管变形较大,套管直径越大其变形和承受应力更小,钻井直径加大失效的风险降低。针对常规直径钻井在抽采过程中受采动影响发生严重破坏的问题,余吾煤业公司开展进行了大直径地面钻井抽采采空区瓦斯的工程试验,取得了良好的效果,现场试验结果表明采用大直径地面钻井可避免钻井完全失效,延长钻井抽采有效期。 展开更多
关键词 地面钻井 大直径钻井 采空区 瓦斯抽采 工程试验 钻井破坏 钻井失效
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