В данной статье рассматривается возможность применения азота для закачки в нефтяные и газоконденсатные залежи для увеличения нефте- и конденсатоотдачи на основе исследований зарубежных ученых. За счет своей широкой распространенности, дешевизны и отсутствия корродирующего эффекта азот является наиболее предпочтительным агентом закачки среди неуглеводородных газов. Азот обладает низкой способностью смешиваться с нефтью, однако достаточно успешно испаряет углеводородную жидкость в пластовых условиях и может применяться для гравитационного вытеснения. Азот может служить продавочным агентом при закачке в залежи метана и углекислого газа. Реализация закачки азота на месторождениях США и стран Ближнего Востока позволила увеличить текущую нефтеотдачу. В?текущих макроэкономических условиях закачка азота является реальной альтернативой сайклинг-процессу.
This article reviews the studies of foreign scientists dedicated to the application of nitrogen injection into oil and gas condensate reservoirs in order to increase hydrocarbon recovery factor. Being widespread, of low cost, and lacking corrosive effect, nitrogen is the preferred injection agent among non-hydrocarbon gases. Nitrogen has poor miscibility with oil; however, it effectively vaporizes the hydrocarbon liquid at reservoir conditions, and can be applied for gravity drainage. Nitrogen can serve as a displacement agent for injection into deposits of methane and carbon dioxide. The implementation of nitrogen injection at the oil and gas fields of the United States and the Middle East has increased current oil recovery. In the current macroeconomic environment, nitrogen injection is a viable alternative to cycling process.
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