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Miraah is a solar thermal energy plant that is under construction in Oman for the production of steam for solar thermal enhanced oil recovery. [1] In July 2015, Petroleum Development Oman and GlassPoint Solar announced that they signed a $600 million agreement to build the 1 GWth solar field. The project will be one of the world's largest solar field measured by peak thermal capacity. [1]
The plant uses large mirrors to focus sunlight and convert oilfield water into steam, which is then used to extract viscous or heavy oil from the ground. This method is used as an alternative to steam generated from the burning of natural gas. [2]
Miraah will be one of the world's largest solar plants, [3] with a solar thermal capacity of 1,021 MW. [4] Construction on the project began in October 2015, with first steam produced in November 2017. [4] A few months later, in February 2018, the facility was officially inaugurated. [5] The project has a daily steam output of up to 6,000 tons, translating into annual gas savings of 1.6 TWh (5.6 trillion BTU ) and annual CO2 emission savings of 300,000 tons. [4] [6] The 1 GWth project will reduce the amount of natural gas used to generate steam for thermal enhanced oil recovery (EOR). In thermal EOR, steam is injected into an oil reservoir to heat the oil, making it easier to pump to the surface. Miraah will generate an average of 6,000 tons of solar steam each day, providing a substantial portion of the steam required at the Amal oilfield operated by Petroleum Development Oman (PDO).
The enclosed trough solar field uses curved mirrors to focus sunlight – rather than using heat from burning natural gas – onto a pipe filled with water. The concentrated sunlight boils the water to create steam, which is fed directly to the oilfield's existing steam distribution network.
In November 2017, GlassPoint and Petroleum Development Oman (PDO) completed construction on the first block of the Miraah solar plant safely on schedule and on budget, and successfully delivered steam to the Amal West oilfield. [7]
A power station, also referred to as a power plant and sometimes generating station or generating plant, is an industrial facility for the generation of electric power. Power stations are generally connected to an electrical grid.
Solar thermal energy (STE) is a form of energy and a technology for harnessing solar energy to generate thermal energy for use in industry, and in the residential and commercial sectors.
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Petroleum Development Oman (PDO) is the leading exploration and production company in the Sultanate of Oman. The Company delivers the majority of the country's crude oil production and natural gas supply. The Company is owned by the Government of Oman, Royal Dutch Shell (34%), Total (4%) and Partex (2%). The first economic oil find was made in 1962, and the first oil consignment was exported in 1967.
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Enhanced oil recovery, also called tertiary recovery, is the extraction of crude oil from an oil field that cannot be extracted otherwise. EOR can extract 30% to 60% or more of a reservoir's oil, compared to 20% to 40% using primary and secondary recovery. According to the US Department of Energy, carbon dioxide and water are injected along with one of three EOR techniques: thermal injection, gas injection, and chemical injection. More advanced, speculative EOR techniques are sometimes called quaternary recovery.
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There are several solar power plants in the Mojave Desert which supply power to the electricity grid. Insolation in the Mojave Desert is among the best available in the United States, and some significant population centers are located in the area. These plants can generally be built in a few years because solar plants are built almost entirely with modular, readily available materials. Solar Energy Generating Systems (SEGS) is the name given to nine solar power plants in the Mojave Desert which were built in the 1980s, the first commercial solar plant. These plants have a combined capacity of 354 megawatts (MW) which made them the largest solar power installation in the world, until Ivanpah Solar Power Facility was finished in 2014.
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Solar thermal enhanced oil recovery is a form of thermal enhanced oil recovery (EOR), a technique applied by oil producers to extract more oil from maturing oil fields. Solar EOR uses solar thermal arrays to concentrate the sun's energy to heat water and generate steam. The steam is injected into an oil reservoir to reduce the viscosity, or thin, heavy crude thus facilitating its flow to the surface. Thermal recovery processes, also known as steam injection, have traditionally burned natural gas to produce steam. Solar EOR is proving to be a viable alternative to gas-fired steam production for the oil industry. Solar EOR can generate the same quality steam as natural gas, reaching temperatures up to 750 °F (400 °C) and 2,500 PSI.
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