Research On The Data Processing For The Receiver Points Acoustics Positioning In The Offshore Seismic Surveying

There is plenty of oil in the ocean,and the world has accelerated the exploration and development of marine oil.So in order to prospect for the marine oil and geological structure more precise,we need continuously improve the exploration equipment and method of acquisition to increase the accuracy of seismic exploration.The detection precision is one of the factors that influence the accuracy of seismic exploration.In recent years,with the rapid development of global satellite positioning system and high precision acoustic positioning technology,the measurement of submarine geophone point provides has been more accurate.In this paper,the error types,gross error detection and data processing of the long baseline acoustic positioning are studied.The paper contains the following five parts:1.It introduces the common method of geophone point in marine seismic exploration,including preliminary wave positioning,acoustic positioning and combined positioning.The paper expounds the positioning principle,method and application effect.2.It systematically analyzes the positioning error of long baseline acoustic positioning error.The error mainly consists of the inaccuracy of transducer’ position,the error of measuring time,the error of velocity,the error of sound ray and so on.And we try different methods to weaken or eliminate the error: for inaccuracy of transducer’ position--applying high precision GPS and measurement equipment,calibrating the installation and Kalman filter;for measuring time – calibrating the responder and difference;forsound ray – rectifying theconstant gradient to weaken the bending error.3.It studies the detection of gross error.Firstly,based on water depth and maximum offset distance we eliminate the wrong data.Then we apply high order difference to eliminate the main gross.Finally,we apply selecting weight iteration and robust estimation to eliminate the remain gross error.4.Itstudies thegeometric positioning algorithm based on robust estimation and builds underwater differential positioning model.To weaken systematic error and get an exact coordinate,we apply the single difference and double difference based on the observed distance between transducer and responder.5.It discusses the development of the software of marine geophone point’s acoustic positioning.The software is based on VC++.