China News Service, Beijing, September 23 (reporter Wang Enbo) The qinhuangdao – Caofeidian oilfield group shore power application demonstration project in Bohai Sea was successfully put into operation on the 23rd, which is the first offshore oilfield group shore power application project in China and the largest offshore power project with the highest AC power transmission voltage in the world. The coastal power demonstration project is expected to reduce carbon dioxide emissions by nearly 200,000 tons per year after it is put into operation.
The global offshore oil and gas development usually uses the associated natural gas or crude oil developed by the oilfield to provide spontaneous electricity to the platform, but the platform spontaneous electricity has disadvantages such as low efficiency, high energy consumption and unstable power supply. Bohai Oilfield is an important energy production base in China and is expected to produce 30 million tons of crude oil by 2021, making it the largest oil field in China. It has 145 generating units with an installed capacity of nearly 1,300 megawatts, equivalent to that of a medium-sized city.
In order to find the optimal solution between increasing storage and increasing production and green emission reduction, CNOOC and State Grid have carried out technological breakthroughs since 2018 to realize the transmission of electricity from onshore power grid to offshore oil fields through submarine high-voltage cables. The crude oil and natural gas used to generate electricity will be better used, and emissions of greenhouse gases such as carbon dioxide and pollutants will be significantly reduced.
According to the plan, the coastal power application project will be implemented in three phases, including the construction of five land switch stations and eight offshore power supply hub platforms in Hebei, Shandong and Liaoning provinces, and the construction of a power grid with a total access scale of 980 MEGAwatts, covering more than 150 production facilities in seven oil fields in the Bohai Sea. The project will be fully operational by 2023.
Wang Dongjin, chairman of China National Offshore Oil Corporation (CNOOC), said that the peak annual energy saving of 1 million tons of standard coal and carbon dioxide reduction of nearly 1.75 million tons is expected to be achieved after the third phase of bohai Offshore power project is put into operation in 2023, which is equivalent to planting 175 million trees. In the future, CNOOC will actively explore new models such as offshore wind power and photovoltaic power supply for oil fields.
In addition, after the use of shore power, the platform does not need to build generator sets, which will simplify the scale of the platform, reduce the dependence on imported generator sets, effectively shorten the construction cycle and commissioning cycle of offshore oilfield engineering, thus reducing the economic “threshold” of marginal oilfield development, and speed up the construction of oil and gas capacity. It is reported that 70 to 80 percent of the new fields in the Bohai oilfield will be developed using shore power, which will lay a solid foundation for the bohai oilfield to produce 40 million tons of oil equivalent. (after)