胜利油田孤东海堤外侧海底地形特征与变化分析

K10(总理台)~K16海堤是孤东海堤重点防护岸段。通过2004年5月、2005年5月以及2005年12月三次测量资料和资料比较分析,K10~K16海堤近岸,距堤百米内水深一般小于5m,有些地段受水动力作用形成冲刷凹坑及沟槽。但海底地形变化在不同的地段是不同的,且冲淤变化差异明显。从K13~K16之间水深地形变化较微弱,K14附近局部略有淤积。K12附近及沿堤以南地段出现强侵蚀岸段,距离岸堤20m左右处,顺堤形成水深7m左右的强侵蚀地形沟槽,严重威胁孤东海堤的安全。因此,分析研究该段地形变化,可以为该段海堤防护提供最佳对策。

A Study of Submarine Topographical Features and Changes Outside the Gudong Embankment of Shengli Oilfield

The sea embankment from K10(The Prime Platform) to K16 is the important target of Gudong embankment protection.Comparing the three survey data we get on May 2004,May 2005 and December 2005 with the original information,the soundings are all less than 5 meter within 100-meter distance from K10~K16 embankment.By the power of water dynamics,some lots develops eroded hollowness and slots.But submarine topography changed differently in the different area,especially in the kinds of erosion and siltation.From K13 to K16 the terrain hardly changes.At K14 local get slight siltation.In the south of K12 platform appears strong erosion shore,about 20-meter distance from the bank,develops a strong erosion terrain around the depth of 7 meter,cause a serious threat to the security of Gudong sea embankment.Therefore,the analysis of these topographical changes can provide the best response to the protection.