The Research Of The Application And Data Interpretation Of Sub-bottom Profiler

Abstract:The sub-bottom profiler is a geophysical method based on the principle of acoustics. It can acquire the vivid information of marine geological structure with continuous sailing. Firstly,on the basis of summarizing the application and research status at home and abroad,the types,characteristics and performance indicators of sub-bottom profilers are systematically summarized and shown.Then,the application of sub-bottom profilers in the site surveys of offshore marine oil platforms and artificial islands,investigation and study of marine disaster-induced geological factors,research of marine Quaternary geology,surveys and maintenance of submarine pipelines,abundance assessments of marine mineral resources are discussed by typical examples.Finally , several issues related to the data interpretation of sub-bottom profilers are researched,and the conclusions are as follows:(1)The sliding average filter method is proposed to eliminate the wave-induced"ups and downs"phenomenon of sub-bottom profiles. It can make the underlying stratigraphical boundaries more clear and the interpretation of sub-bottom profiles more accurate.(2)Referring several empirical formulas of forecasting velocity of sound in marine sediment,the marine sediment sound velocity structure model is established to be used to the time-depth conversion calculation to improve the interpretation accuracy.(3)According to the principle of sub-bottom profiler,the calculating formula for the distortion rate and the distortion correction in shallow sea areas are separately deduced,which provide important reference value to the use of"C-View"software to interpret the information on such sub-bottom profiles more accurately.