LF-AUV3000L is a three-dimensional deep-water AUV, which is equipped with core components such as high energy density ratio battery, integrated control system, communication, navigation and positioning equipment, seismic sensor equipment and unloading unit to form a set of unmanned intelligent system with long baseline base station. It can save seismic wave data acquisition homework based on route independent decisionmaking route from the total control software platform to 3,000 meters.
It can solve the problem of traditional OBFN deep water placement and recovery is inefficient and cannot be slightly determined, and to provide new equipment for ultradeep water oil and gas survey and seabed scientific research.
The traditional offshore oil and gas seismic exploration method is to sink the towing line composed of pressure sensors to a certain depth under the sea surface and record the seismic reflection from the seabed. When the sensor is directly coupled with the seabed, it can not only obtain pressure records, but also obtain particle vibration velocity records in one vertical and two horizontal directions, which provides more abundant information for seismic wave imaging. Since the 1980s, international oil, gas and geophysical service companies have successively developed seismic exploration technologies such as four component submarine cable (OBC), submarine seismic (OBS) and submarine node (OBN). OBN is a new submarine seismic exploration technology developed in recent 10 years. The OBN can be deployed by cable link in the exploration of water depth less than 1500m, while the OBN needs to be deployed by underwater robot (ROV) in the exploration of ultra deep water area greater than 1500m. Due to the high cost and low efficiency of ROV deployment, the concept of flight node (FN) has been put forward internationally recently, that is, OBN has the function of autonomous navigation and positioning. This submarine flight node instrument (OBFN) is expected to become a key equipment and technology for ultradeep water oil and gas land break exploration in the future. The oil and gas resources in the South China Sea account for about 1 / 3 of China's total resources, of which about 70% are contained in 16 deepwater basins. Combined with the ocean drilling data in the South China Sea, the evaluation of oil and gas exploration potential in ultra deepwater basins is of great significance to the development of deepwater oil and gas exploration equipment and technology in China and the maintenance of national energy security and marine rights and interests in the South China Sea.
In view of the problems of high cost and long period in the current deep-water oil and gas seabed node (OBN) seismic exploration, the seabed flying node seismograph with autonomous navigation and positioning and autonomous navigation and its related seismic data processing and interpretation technology are developed, and the experimental application is carried out in the ultra deep water basin in the north of the South China Sea in combination with the ocean drilling data of the South China Se. It provides scientific guidance for China's ultra deep water oil and gas exploration, and also provides support for China's establishment of ultra deep water oil and gas seismic exploration core equipment and technology with independent intellectual property rights.