China National Offshore Oil Corporation announced today (July 15) that China's most advanced deep-water geophysical prospecting team has completed the three-dimensional seismic exploration operation in the equatorial waters of West Africa for the first time, filling the gap in China's operation at the zero latitudes of the equator. The operation area is located in Gabon, West Africa, and the project area exceeds 10,000 square kilometers. It is the first marine 3D seismic exploration project with a single operation area over 10,000 in the history of marine petroleum exploration.
The equator traverses the country, and the operating sea temperature can reach 40 degrees, and the speed of sea creature breeding can be several times that of the South China Sea, directly challenging the cable's tensile limit. The line length is as long as 180 kilometers, and the shallowest depth is only 30 meters.
Wu Tao, fleet manager of “Haiyang Petroleum 721â€: During operation, 12 of our 8,100-meter-long cables were opened at the same time on the sea, covering 1.891 million square meters of sea area. The size was equivalent to more than 1200 standard football fields and reached the ship. The team's operational limits.
CNOOC 721 was continuously operating on the sea for 5 months, setting the record for the longest continuous operation of geophysical vessels on the sea. “Haiyang Youji 721†has been refreshing for five times in a row. The three-dimensional seismic acquisition of geophysical prospecting in China has achieved the highest daily production and monthly production. The highest daily output reached 116.14 square kilometers.
Qi Meisheng, CEO of CNOOC Oilfield Services Co., Ltd.: The successful completion of the project indicates that China has the capability to implement high-end 3D seismic exploration operations under extreme cold and extreme heat conditions. It will be developed for the “going out†of technical equipment for the petroleum industry in China. The “One Belt and One Road†cooperation in the international energy sector provides strong guarantees.
The deepwater geophysical fleet consists of the No. 720 Offshore Oil and No. 721 Offshore Oil. The Offshore Oil 720 is the first new-generation deep-water 3D seismic prospecting vessel in Asia. It has a length of 107.4 meters, a width of 28 meters, and a towing capacity of 12 8,000. The rice solids collection cable is used for deep-sea exploration operations, and the seafloor structure map is drawn to provide a basis for determining the oil reserves and further development of the seabed. In 2016, CNOOC 720 completed the 3D seismic acquisition of more than 5,400 square kilometers in two working areas of the Barents Sea and completed the operation of the equator, achieving seamless integration of 3D seismic acquisition operations in the extremely cold and extremely hot waters of the world. .
The "Haiyang Shiyou 721" was upgraded on the basis of 720 ships, and it was developed and put into operation in only 15 months. It created the highest rate of construction of the same type of geophysical vessels. This time together with its sister ship, CNOOC 720, formed a "Made in China" joint fleet and jointly completed a seismic exploration project in the Equatorial seas of West Africa.
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