Capturing weak seismic wave signals as "sea veins" to accurately signal the seabed

Recently, the "Offshore Oil 771" geophysical exploration vessel was equipped with the first set of underwater seismic exploration node acquisition system equipment independently developed by China - "Haimai" - and successfully completed the operation of the Bozhong 8-3 work area in the Bohai Sea. The core equipment of the "Sea Vein" system - node acquisition equipment, can capture seismic wave signals equivalent to 1/150 of the size of mosquito flight sound, with better performance, which also enables the "Sea Vein" to more accurately signal the seabed strata

Recently, the "Offshore Oil 771" geophysical exploration vessel was equipped with the first set of underwater seismic exploration node acquisition system equipment independently developed by China - "Haimai" - and successfully completed the operation of the Bozhong 8-3 work area in the Bohai Sea. The core equipment of the "Sea Vein" system - node acquisition equipment, can capture seismic wave signals equivalent to 1/150 of the size of mosquito flight sound, with better performance, which also enables the "Sea Vein" to more accurately signal the seabed strata.

Wang Liubo, Deputy Manager of the Source Ship of the "Haimai" Operation Team:This time, our work in Bozhong 8-3 work area is the first work area completed by "Haimai". This work area has a water depth of 20-30 meters, and we efficiently completed a 3D geological exploration of 104 square kilometers in 40 days. In 2009, I conducted exploration with a streamer seismic acquisition system, which confirmed that the area has significant exploration potential.

The "Haimai" system is conducting more detailed exploration this time. How was this precise exploration completed?

Li Zeshan, Engineer of the Node Collection and Release Ship of the "Haimai" Operation Team:These node acquisition equipment installed on the seabed are the core devices for precise detection, which integrate high sensitivity detectors and ultra-low noise acquisition circuits, greatly improving the detection ability of weak signals. They can capture seismic wave signals equivalent to 1/150 of the size of mosquito flying sound in a 10000 meter layer.

During the operation, the operators regularly place thousands of "sea vein" nodes at designated positions on the seabed through cables, forming a huge information collection network covering the seabed. These nodes are like 'stethoscopes', receiving seismic wave signals reflected from the seabed strata and storing and recording them in the form of data. After completing the assignment, retrieve it, download and analyze the collected data information, process it into seismic profiles, and ultimately generate clear "nuclear magnetic images" of the seabed strata.

Wang Liubo, Deputy Manager of the Source Ship of the "Haimai" Operation Team:In this assignment, we deployed 6000 nodes at once, ensuring stable and reliable operation. The sensitivity, stability, and consistency of the nodes were superior to mainstream foreign equipment, and we obtained high-definition oil and gas reservoir data information.

(CCTV News Client)

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