This project belongs to the field of marine technology.
Building a maritime power, improving marine resource development capabilities, and safeguarding national maritime rights and interests are our country's national strategies. Under my country's more than 3 million square kilometers of marine land, there are endless resources. As my country's marine development advances into deep water, a large number of offshore oil and gas operation platforms have been put into use one after another. When operating at sea for a long time, platforms must withstand extreme marine environments such as typhoons, huge waves and rapids. Once a safety accident occurs, it can delay the construction period, damage the platform, and even cause major disasters such as casualties and oil and gas leaks. Offshore platform monitoring can discover early signs and hidden dangers of accidents in long-term operation, monitor and evaluate risks of offshore operations, and promptly and effectively eliminate the sprouts of accidents, thus becoming an important means to ensure the safety of platform installation and operation.
Different from onshore testing and measurement, offshore platform monitoring has the characteristics of long monitoring time, extremely harsh working environment, and high system reliability requirements. It faces equipment networking between complex partitioned compartments, sensor installation and calibration, automatic data processing and programming, and fine measurement of large structures. Overseas offshore monitoring technology for the performance of offshore platforms has been developed early, but relevant monitoring technologies and monitoring data are strictly confidential, making it almost impossible to introduce technology. To this end, Shanghai Jiao Tong University, in conjunction with Offshore Oil Engineering Co., Ltd. and other units, has developed a remote real-time monitoring system for the safety performance of large offshore platforms after years of practice in response to the needs of my country's ocean engineering.
The system realizes unattended monitoring of the stress and motion performance of key structures of the platform at sea, and remotely transmits real-time data to the land-based monitoring center for analysis and processing to accurately grasp the performance of the remote platform, thus ensuring the operation and safety of my country's deepwater offshore platforms. Played an important role. The main innovations of the project include:
(1)Based on fiber grating sensing technology, we have overcome the problems of harsh measurement environment, cramped layout, large range, and difficult calibration. We have developed safety monitoring theories and methods for key structures of large offshore platforms, and successfully applied relevant technologies and equipment to sliding launch of jacket platforms. Engineering projects such as rocker arm reaction force monitoring, collision force monitoring between large barges and jacket legs, and stress monitoring of complex structural bulkheads of service platforms.
(2)Using the principle of photogrammetry, a dynamic monitoring scheme for the multi-point docking process of large ocean platforms has been innovatively developed. Without relying on conventional positioning methods such as satellite navigation, the measurement accuracy has been improved from decimeter level to less than one centimeter, providing more accurate, more stable and more economical measurement results for the platform docking and installation process.
(3)Innovate the centralized control technology of multi-cabin complex spatial data acquisition equipment, solve the problem of multi-scale spatial network integration in complex space and electromagnetic isolation environments, and achieve centralized control and management of various monitoring equipment on the entire platform.
(4)Based on years of platform monitoring experience, we have innovatively developed real-time screening and processing technology for monitoring data, proposed a technical solution for automatically identifying, repairing, extracting, and analyzing and calculating measured data, and programmed it, significantly improving the timeliness of platform monitoring.
Since 2006, the research results have been successfully applied in the installation operations of long-serving large offshore platforms such as "Nanhai Endeavour FPSO" and "Haiyang Shiyou 981" and "Liwan 3-1","Panyu 34-1","Bozhong 35-2","Huizhou 25-8","Lufeng 7-2" and other large offshore platforms, ensuring the safety of offshore equipment with a total value of tens of billions of yuan, and has been fully affirmed and highly evaluated by the application units.
The successful development and application of the system indicates that my country has internationally advanced safety monitoring capabilities for offshore operations and installation of large-scale deep-sea platforms, which is of great significance to improving my country's marine equipment support capabilities. With the continuous advancement of my country's maritime power strategy and the development of deep-sea resources, the remote real-time monitoring system for the safety performance of marine platforms will play a greater role in the support of large-scale marine equipment.