my country’s first 3,000-meter ultra-deep water three-dimensional seismic exploration operation completed

"Haijing" is the first set of marine streamer seismic exploration and acquisition equipment independently developed and manufactured by my country. It has filled the gap in equipment technology in the field of marine seismic exploration in my country and has achieved from "0" to A major breakthrough in "1", "Haijing", with its ultra-low-frequency, high-precision three-dimensional seismic acquisition capabilities, accurately depicts "3D three-dimensional maps" of deep water depths and complex geological structures, greatly improving my country's oil and gas exploration capabilities in ultra-deep water fields.

"The three-dimensional seismic exploration technology realized by the 'Haijing' system has solved the bottleneck restricting my country's ocean, especially deep-sea oil and gas exploration technology and equipment, and comprehensively improved the core of my country's offshore oil and gas exploration technology. Competitiveness is of great significance to improving the overall research and development capabilities of offshore oil and gas equipment and ensuring national energy security," said Ruan Fuming, a technical expert from CNOOC.

This operation is located in the 3,000-meter ultra-deep water area of ​​the Pearl River Mouth Basin. The average water depth in this area is about 2,000 meters, the maximum operating water depth reaches 3,500 meters, and the maximum buried depth of the exploration target layer is 5,600 meters, breaking the maximum water depth record for my country's marine three-dimensional seismic exploration operations. The "Haiyang Shiyou 720" deepwater geophysical exploration vessel equipped with "Haijing" used 60 days of production time to collect 40TB of three-dimensional seismic exploration data, laying a solid foundation for the implementation of basic petroleum geological conditions such as the geological structure, sedimentary filling and oil and gas migration of the work area.

Marine streamer three-dimensional seismic exploration equipment technology is widely used in the field of energy exploration. The technical threshold is high and research and development is difficult. Since it was put into production,“Haijing" has successfully completed three-dimensional seismic exploration of 5 work areas totaling 6,552 square kilometers in Chinese waters.

During this operation, the "Haiyang Shiyou 720" deep-water geophysical exploration vessel followed The design requires that 10 cables with a length of more than 8 kilometers in the "Haijing" system be laid into the sea water in sequence to form a data collection network with an area equivalent to 1021 standard football fields, and sea surface towing cable collection operations will be carried out along the route. , the location of oil and gas reservoirs can be accurately divided like "longitude and latitude lines" on the vast sea surface, significantly improving the imaging quality of middle and deep layers, especially the basement imaging, which is expected to open up a new situation in my country's deepwater oil and gas exploration and development.