1. School of Geosciences and Info-physics, Central South University, Changsha, Hunan 410083, China; 2. Geophysical Division of China Oilfield Services Limited, Tianjin 300451, China; 3. National Engineering Research Center of Offshore Oil and Gas Exploration, Beijing 100028, China
Abstract：Streamer positioning is a key step of offshore seismic exploration, and an accurate streamer model and positioning algorithm are the core of high-precision streamer positioning. The application of the existing streamer positioning algorithm to the multi-streamer exploration scene is exposed to problems such as the loose mathematical model of streamers and the inadequate use of the observation values of positioning networks. Therefore, a multi-streamer positioning algorithm based on curvilinear integral is proposed in this paper. Firstly, a rigorous mathematical model of streamers based on curvilinear integral is built. Then, with the model, the error equation of each positioning observation value is derived. Finally, the experimental verification is carried out by simulation and measured data. The experimental results show that the accuracy of the shape and position of the streamer estimated by the new algorithm is better than that of the traditional algorithm. Specifically, the precision of the along-line direction is better than 1 m, and that of the across-line direction is better than 3 m, which can meet the needs of offshore seismic exploration and subsequent seismic data analysis.
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