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Study on the Unstable Geological Factors of Oil Gas Submarine Pipeline in ShallowSea Shelf Area

机译：浅海陆架区油气海底管道不稳定地质因素研究

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摘要

Oil gas submarine pipeline generally needs to pass through different shallow sea shelfrnareas, therefore, may encounter various unstable geological problems unavoidably, suchrnas tidal bank and tidal creek migration, slope soil body slumping and taphrogeny,rnsubmarine differential erosion and sand wave migration etc., which lead to suspendedrnspan, damage and even breaking-down of pipeline. Based on pipeline route survey andrnpost-lay detection data of oil gas submarine pipeline in shallow sea shelf area, this paperrnstudies the distribution rules, genetic mechanics and hazard to submarine pipeline of thernfollowing unstable geological factors, including the migration of tidal creeks and tidalrnbanks in Liaohe River delta, submarine differential erosion in Huanghe River delta andrnthe relict sediment area of continental shelf of northern South China Sea, sand wavernactivities in the continental shelf of northern South China Sea and the submarine slopernsoil body slumping in Huanghe River delta etc.rnSurvey data reveal that the maximum migration rate of tidal creeks and tidal banks inrnLiaohe River delta may reach one hundred meters and the differential height betweenrnthem is 2m to 5m. The height of submarine differential erosion in abandoned HuanghernRiver delta varies between 4m and 6m. Slumping and taphrogeny of submarine soil formrnlarge amount of disturbed soil strata, slope and silt flow sediment. Differential erosion inrnthe relict sediment area of continental shelf of northern South China Sea may lead to thernformation of furrows and ridges with the differential height of above 30m. The heightrndifference between moving sand wave peak and wave hollow may reach 8m. Moving
机译：油气海底管道一般都需要经过不同的浅海陆架区域，因此不可避免地会遇到各种不稳定的地质问题，如潮汐滩和潮汐小溪迁移，斜坡土体塌陷和成因作用，潜艇微分侵蚀和砂波迁移等。导致跨度暂停，损坏甚至管道破裂。基于浅海陆架区油气海底管道的管线路线调查和后期探测数据，研究了辽河潮汐小溪和潮汐堤岸迁移等不稳定地质因素对海底管道的分布规律，成因和危害。河三角洲，黄河三角洲的海底微分侵蚀和南海北部大陆架的残留沉积物区域，南海北部大陆架的沙波活动和黄河三角洲的海底斜坡土体塌陷等.rnSurvey数据显示辽河三角洲的潮汐小河和潮滩的最大迁移速度可能达到一百米，两者之间的高度差为2m至5m。被遗弃的黄河三角洲的海底微分侵蚀高度在4m至6m之间变化。海底土壤的塌陷和成因形成了大量扰动的土壤地层，斜坡和淤泥流沉积物。南海北部陆架剩余物沉积区的差异性侵蚀可能导致沟壑和脊的形成，差异高度在30m以上。移动沙波峰与波谷之间的高度差可达8m。移动

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  • 来源
  • 会议地点 Shanghai(CN);Shanghai(CN)
  • 作者

    Yongchen Xu; Jianzheng Wu; Longhai Zhu; Nan Wang;

  • 作者单位

    Key Lab of Submarine Geosciences and Prospecting Techniques, Ministry ofrnEducation, College of Marine Geo-Science, Ocean University of China, 238 SonglingrnRoad, P.O. Box 266100, Qingdao, Shandong, China PH(086)0532-85902085 rnFAX(086)0532-85902662 Email: xych@ouc.edu.cn;

    rnKey Lab of Submarine Geosciences and Prospecting Techniques, Ministry ofrnEducation, College of Marine Geo-Science, Ocean University of China, 238 SonglingrnRoad, Qingdao, Shandong, CHN;

    rnKey Lab of Submarine Geosciences and Prospecting Techniques, Ministry ofrnEducation, College of Marine Geo-Science, Ocean University of China, 238 SonglingrnRoad, Qingdao, Shandong, CHN;

    rnKey Lab of Submarine Geosciences and Prospecting Techniques, Ministry ofrnEducation, College of M;

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  • 正文语种 eng
  • 中图分类 管道运输;
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