The first large-scale development of deep oil fields in the South China Sea
Recently,CNOOC announced that the regional development project of Lufeng Oilfield Group,located in the eastern sea area of the South China Sea,was successfully put into operation.This is the first time that China's South China Sea has realized large-scale development of deep oil fields above 3000 meters.The peak annual output of oil fields exceeds 1.85 million tons.
The regional development project of Lufeng Oil Field Group includes the development of four oil fields.The sea area is more than 200 kilometers southeast of Hong Kong and the water depth is 140 meters to 330 meters.The main production facilities include two drilling and production platforms and one underwater production system.The Lufeng 14-4 oilfield put into production this time is the first oilfield of the project.
Wu Yiming,general manager of Lufeng oilfield operation area,introduced that Lufeng 14-4 oilfield is a deep complex fault-block low-permeability oilfield,with the main reservoir depth ranging from 3100 meters to 4300 meters,which is far deeper than the depth of conventional offshore oil fields,and is dominated by low-permeability and ultra-low-permeability reservoirs,with great technical difficulties and high costs in development,which is so far difficult to develop in the eastern waters of the South China Sea.
It is reported that Lufeng 14-4 platform is an offshore crude oil production platform with large weight and high equipment localization rate designed and built independently by China.The total height of the platform is 218 meters,equivalent to 70 floors;The total weight is nearly 30000 tons,more than three Eiffel towers.The platform has a complete offshore oil and gas processing process and a set of associated gas recovery system,which can process 28000 barrels of crude oil and 84000 cubic meters of associated gas every day during the peak period.
The South China Sea East Oil Field,where the Lufeng Oilfield Group Regional Development Project is located,is the second largest offshore energy production base in China.The cumulative increase in crude oil production in the past three years is 3.25 million tons,accounting for about one third of the national crude oil increment in the same period.
In recent years,the oil fields in the east of the South China Sea have expanded new exploration fields to the deep Paleogene,and many medium-sized oil and gas fields such as Lufeng 14-4 and Huizhou 26-6 have been discovered in succession,with proved geological reserves of more than 100 million tons,most of which are low-permeability oil and gas fields.(Economic Daily)
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