胜利油田近岸海域土体孔隙压力对海底管道安全影响分析  

Analysis of the Influence of Soil Pore Pressure on Submarine Pipeline Safety in Offshore Sea Area of Shengli Oilfield

作　　者：徐帅陵[1] 龙东[2] 张璐 XU Shuailing;LONG Dong;ZHANG Lu(Petroleum Engineering Design Co.,Ltd.,SINOPEC;Fengcheng Oilfield Operation Area of Xinjiang Oilfield Company;Basic Construction Agency of Xinjiang Oilfield Company)

机构地区：[1]中石化石油工程设计有限公司 [2]新疆油田公司风城油田作业区 [3]新疆油田公司基本建设工程处

出　　处：《油气田地面工程》2022年第12期11-16,22,共7页Oil-Gas Field Surface Engineering

摘　　要：孔隙水压力变化是导致土体液化的主要因素,液化土体严重影响管道安全。为保障海底管道安全运营,通过分析土体液化产生的原因及其对管道安全的影响,研发了孔隙水压力监测设备,在较大风浪环境下对胜利油田桩104海堤近岸海底土体孔隙水压力进行了观测。监测数据结果表明:液化土体一方面会削弱海底管道稳定性,另一方面会导致管道地基发生不均匀沉降;风浪环境直接影响孔隙水压力、超孔隙水压力变化。其中,孔隙水压力、超孔隙水压力在该风浪作用下仅发生多次剧烈振荡,主要原因是风浪强度没有引发海床土体的塑性变形,即该海域在常时发生海床土体液化的可能性较低,管道处于安全状态。The change of soil pore water pressure is the fundamental cause of soil liquefaction,which seriously affects pipeline safety.In order to ensure the safe operation of submarine pipelines,the pore water pressure monitoring equipment is developed by analyzing the causes of soil liquefaction,and its influence on pipeline safety,and the pore water pressure of offshore soil of Pile104 seawall in Shengli Oilfield is observed under large wind and wave environment.The results of monitoring data show that liquefied soil will not only weaken the stability of submarine pipeline,but also lead to uneven settlement of pipeline foundations.The wind and wave environment directly affects the changes of porewater pressure and excesspore water pressure.Among them,the pore water pressure and excesspore water pressure oscillated violentlymany times under the action of the wind and waves.The main reason is that the strength of wind and waves does not cause the plastic deformation of seabed soil,that is,the possibility of seabed soil liquefaction is low at normal times in this area,and the pipeline is in a safe state.

关 键 词：管道 监测 孔隙压力 粉土 液化 

分 类 号：TE952[石油与天然气工程—石油机械设备]