Application Of Submarine Pipiline Detection Method

The submarine pipeline is the lifeline of marine engineering and plays an important role in transporting oil and gas,water transportation and sewage.During operation,submarine pipelines are susceptible to damage:one is the environmental impact caused by complex hydrodynamic conditions such as ocean waves and currents,and the other is the human impact of increasingly frequent human marine activities on submarine pipelines.How to ensure the safe operation of submarine pipelines is a problem that must be solved in the development of offshore oilfields.Accurate determination of the state of the submarine pipeline is a necessary guarantee and prerequisite for safe operation.Taking the measurement of oil pipelines in the sea area of Cheng Dao as an example,the paper studies the key technologies and methods of submarine pipeline detection.As a kind of submarine survey instrument with clear imaging and simple operation,3D sonar technology is one of the key technologies for the detection of submarine pipeline routing.It has great advantages in submarine pipeline detection in shallow water depths.Multi-beam technology is another key technology for submarine pipeline routing investigation.It has the characteristics of high precision and high resolution,and can solve the problem of small 3D sonar range and small observation area.Therefore,the combination of 3D sonar detection technology and multi-beam detection technology can perform comprehensive detection of submarine pipeline routing.Based on these two key technologies,a comprehensive analysis method for submarine pipeline route detection is proposed.The single-beam,multi-beam,side-scan sonar and shallow profiler tools are used to detect the seabed topography and shallow strata,using side sweep.Sonar,shallow profiler,magnetometer,multi-beam and three-dimensional sonar technology to achieve the routing characteristics of the submarine pipeline and the measurement of the suspended height and length.According to the comprehensive detection method of submarine pipeline detection proposed in the paper,the comprehensive detection scheme of oil pipeline in Chengdao sea area is proposed,and the topographic survey of the submarine pipeline routing area,the survey of the submarine pipeline routing area,the shallow stratum investigation of the submarine pipeline routing area,and the seabed are carried out.Pipeline operation status detection,submarine pipe bare length and suspension height measurement.The comprehensive geological characteristics of the ?-? pipeline routing area in the sea area of Yeouido,the length of the suspended pipeline and the suspended height of the routing area of the oil pipeline in the sea area were ascertained.Through in-depth analysis of the results data,it is found that there is an abnormality in the middle layer of the oil pipeline route in the sea area.According to the detection results and analysis conclusions,the paper puts forward some suggestions for the further detection of the corresponding sea area strata by using drilling or static penetration test.It is proposed to comprehensively control the corresponding sections of the ?-? pipeline routing area in the Chengdao area.