Offshore seismic monitoring system and method

A method for monitoring a reservoir underwater, the method comprising:

• using a remote operated vehicle (ROV) to deploy or retrieve plural nodes to seabed;
• deploying an autonomous underwater vehicle (AUV) to monitor and exchange data with the plural nodes;
• generating seismic waves with a seismic source;
• recording with the plural nodes the seismic waves;
• and
• transferring data indicative of the seismic waves to a processing facility for generating a final image of the reservoir,
• wherein at least one node of the plural nodes has a head that houses the seismic sensor and the head is configured to burrow in the seabed, up to a predetermined depth, and
• the head remains in electrical contact through a connector with a base of the at least one node during the seismic survey.

A system for monitoring a reservoir underwater, the system comprising:

• plural nodes, each having a seismic sensor for detecting seismic waves;
• a remote operated vehicle (ROV) configured to deploy or retrieve the plural nodes to seabed;
• an autonomous underwater vehicle (AUV) configured to monitor and exchange data with the plural nodes;
• a vessel configured to provide support for the AUV and the ROV;
• and
• a cage that is deployed from the vessel to the seabed and configured to store part of the plural nodes,
• wherein at least one node of the plural nodes has a head that houses the seismic sensor and the head is configured to burrow in the seabed, up to a predetermined depth.