English Deutsch Linde Worldwide Welcome to The Linde Group About Linde About Linde Company Profile The Linde Spirit Financial Overview Governance Divisions Group Procurement Linde Worldwide Corporate History Investor Relations Investor Relations Business Model Targets and Strategy Potential Merger Financial Calendar Financial Publications Capital Markets Days Financial Overview Linde Shares Linde Bonds Annual General Meeting 2017 Corporate Governance FAQ Investor Relations Contacts News & Media News & Media Press Services Press Releases Proposed Merger Linde @ Social Media Events Publications Linde Apps Image Library Video Library Media Contacts Corporate Responsibility Corporate Responsibility Strategy Business and Governance Environment and Safety Employees and Society Measuring sustainability Service Clean Technology Clean Technology Clean Energy Our Clean Technology Portfolio FAQ – Clean Technology Careers Careers Work @ Linde People @ Linde Roles @ Linde Jobs @ Linde Students & Graduates @ Linde Apply @ Linde Job Blog Career Contacts Contact Contact Route Planner Clean Technology Clean Energy Our Clean Technology Portfolio Clean Technology Worldwide Hydrogen Energy Energy Storage Liquefied Natural Gas (LNG) Biotechnology and photovoltaics Enhanced Oil and Gas Recovery (EOR/EGR) Enhanced Oil Recovery (EOR) Enhanced Gas Recovery (EGR) Nitrogen Rejection Unit (NRU) Carbon Capture & Storage (CCS) CO2 Applications FAQ – Clean Technology Clean Technology Our Clean Technology Portfolio Enhanced Oil and Gas Recovery (EOR/EGR) Enhanced Gas Recovery (EGR) Enhanced Gas Recovery (EGR) Both nitrogen (N2) as well as carbon dioxide (CO2) can be used to increase yield from gas reservoirs. N2 is injected into natural gas reservoirs to artificially increase pressure – which results in more yield from the well. Called "Enhanced Gas Recovery" (EGR), this process can also be accomplished with other inert gases. In the USA, carbon dioxide (CO2) sourced from underground wells is an economical alternative. Pilot project for CO2 injection in Germany Gaz de France Produktion Exploration Deutschland GmbH (GDF-PEG), which owns gas reservoirs at Altmark in Saxony-Anhalt, Germany, has just started a pilot project to test this. The goal of the project is to answer all open questions about CO2 injection. In concrete terms, GDF-PEG is investigating whether the use of carbon dioxide increases recovery rates from the gas field. The Linde subsidiary Linde Engineering Dresden was responsible for planning and constructing the CO2 injection system here. Maintaining pressure In contrast, nitrogen can be recovered virtually anywhere from atmospheric air – via an air separation plant. Physically, there are also differences between the two gases: CO2 requires more compression than N, which is why greater amounts of it are needed to create high pressure in natural gas reservoirs. This means that the EGR process using compressed nitrogen is more energy-efficient than the CO2 variant. To maintain the pressure in a reservoir, another technology has also been developed: part of the recovered natural gas is fed back underground. This process is used by the Abu Dhabi National Oil Company (ADNOC) at its Habshan gas field, for example. But because natural gas is urgently needed to create power, ADNOC and Linde have founded the joint venture Elixier. In 2011, this joint venture constructed two major air separation plants in Mirfa, a coastal city in Abu Dhabi, which produce circa 670,000 cubic metres of nitrogen per hour. From Mirfa, the nitrogen will be transported to its inland Habshan field via a 50-kilometre long pipeline and used for enhanced recovery of gas and oil reserves. The project is also strategically important: ADNOC has access to circa 90 percent of Abu Dhabi's total oil and gas reserves. These are considered to be the fourth-largest in the world. Clean Technology Contact Corporate Communications Klosterhofstraße 1 80331 München Phone +49 (0)89 357 57-1322 Fax +49.89.357 57-1398 Email us Linde Technology All Editions PDF Download Download Download Linde Annual 2013 (PDF 4617 KB) More information www.elixier.ae EOR with CO2 or N2 Sitemap Terms of Use Legal Notice Data Protection Cookie Policy © The Linde Group 2017