Field trial of fibre‐optic multi‐component sensor system for application in ocean bottom seismic

Abstract

A fibre‐optic sensor system for application in an ocean bottom acquisition system has been developed and tested. The analysis of the data confirms the system's high degree of vector fidelity, high signal‐to‐noise ratio, very good ground‐station coupling, reliability and excellent response in general to wave modes in connection with ocean‐bottom seismic. A spread of two fibre‐optic multi‐component sensor cables, were deployed at about 40m water depth in the harbour of Trondheim, Norway. The fibre‐optic data has been analyzed and compared to data from a test cable based on electronic MEMS technology and deployed at the same location. This test confirms that fibre‐optic sensor technology, for applications within permanently buried seismic acquisition systems, is viable and can be introduced to the industry in connection with life of field seismic projects.