Review of Techniques for Measuring and Monitoring Seabed Subsidence

Underwater subsidence is an event present in several petroleum exploration areas. Early detection of these events minimizes environmental consequences and improves the exploration region's geomechanical model. This material reviews works that present solutions for monitoring and measuring underwater subsidence. It was identified that most techniques use pressure data to monitor the subsidence occurrences, and some use inclination data. The identified techniques include data treatment: for pressure data, a 14 data average, and using a local measurement as a reference, and for inclination data, Kalman filter and integration of angles. It was concluded that using pressure data with a local reference offers the best accuracy.