An overview of the effect of OBN node counterweights on position offset
OBN is the main method of marine seismic acquisition at present,and its point accuracy is one of the main factors in evaluating seismic data.In actual offshore exploration operations,GPS and other positioning sys-tems are used to deploy nodes into the sea according to the designed coordinates.Due to the influence of OBN nodes'own gravity,sea buoyancy,artificial throwing error,hull speed,wave current and other factors,the actu-al bottom position of OBN often deviates from the preset position.This paper takes OBN weight as the research object to study the influence of different ocean current directions and ocean current velocity on node point offset of different weight,and combines the conclusion with the practice.