Abu Dhabi National Oil Company (ADNOC) has announced that it is moving ahead with plans to expand the capture, storage and utilisation of carbon dioxide (CO2), produced from either the Habshan-Bab gas processing facilities or the Shah gas plant.
A decision on which plant to capture the CO2 from first will be taken in 2019, the company said, adding that the project will be engineered so as not to interrupt ongoing production from either facility.
The additional CO2 capture will reduce ADNOC’s carbon footprint and liberate natural gas, previously used for oil field injection, for other more valuable purposes, while simultaneously addressing growing global demand for oil by boosting recovery from its maturing reservoirs, it said in a statement.
The announcement was made at the International Carbon Capture Utilisation and Storage (CCUS) summit in Edinburgh by Omar Suwaina Al Suwaidi, ADNOC executive office director.
The Shah plant is one of the world’s largest facilities processing ultra-sour gas. It processes about 1.3 billion standard cubic feet per day (scfd) of sour gas and associated condensates, which contain over 20 percent hydrogen sulfide and 10 percent CO2.
By 2025, modifications to the facility would enable the gases to be captured as part of the sulfur recovery process and converted into pure CO2 for enhanced oil recovery (EOR). Using advanced CCUS technology, more than 2.3 million tonnes per annum of CO2 are planned to be captured and safely locked away underground.
The Habshan and Bab complex could capture another 1.9 million tonnes per year of CO2. The complex can process up to 6.2 billion scfd of associated gas, making it the largest in the UAE and one of the biggest in the Gulf.
Al Suwaidi said: "Not only does the technology help address environmental concerns by safely locking away CO2, but it also enables valuable and cleaner burning gas, previously used to enhance oil recovery, to be leveraged for other purposes, including power generation, desalination and industrial uses."
ADNOC said it plans to capture about 5 million tonnes of CO2 per year before 2030.
Currently, ADNOC has the capacity at Al Reyadah to capture 800,000 tonnes of CO2 annually from Emirates Steel Industries. The CO2 is compressed and dehydrated before being transported through pipelines for injection into reservoirs at the Rumaitha and Bab oilfields to boost oil recovery.
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