Ф 03-03 Kasymova Zh. Zh

Gas injection

Gas injection or miscible flooding is presently the most-commonly used approach in enhanced oil recovery. Miscible flooding is a general term for injection processes that introduce miscible gases into the reservoir. A miscible displacement process maintains reservoir pressure and improves oil displacement because the interfacial tension between oil and water is reduced. This refers to removing the interface between the two interacting fluids. This allows for total displacement efficiency. Gases used include CO₂, natural gas or nitrogen. The fluid most commonly used for miscible displacement is carbon dioxide because it reduces the oil viscosity and is less expensive than liquefied petroleum gas. Oil displacement by carbon dioxide injection relies on the phase behavior of the mixtures of that gas and the crude, which are strongly dependent on reservoir temperature, pressure and crude oil composition.


23.3. Scan the text “Enhanced oil recovery methods”. Find the particular information:
• Enhanced oil recovery is;
• techniques for enhanced oil recovery;
• Gas injection is.


23.4. Themes of SIW
1. Methods of enhanced oil recovery
2. Techniques for enhanced oil recovery
3. Thermal recovery, gas injection, and chemical injection.
4. Modern methods of enhanced oil recovery
Practical class №24. Separation, demulsification
Aims of practical lesson is introduction with separation and types of separators
24.1. Lexical terms and word combinations


treatment - (технологическая) обработка; очистка
separationотделять(ся); выделять(ся); отделение
to separate - разделение
separator - сепаратор
to measure - измерять
to reduceу - меньшать, снижать; понижать
storage tank - резервуар-хранилище
inlet/outlet - вход/выход
bottom - дно
gas-gathering system - газосборная система; газоотводная система
swirling motion - вихревое движение
baffle - направляющая перегородка
chamber - камера
swirl cylinder - вихревой цилиндр
to drain - дренировать; сливать; стекать; спускать
to connect - соединять
flow line - выкидная линия (трубопровод, идущий от скважины к сепаратору); сборный нефтепровод
float - поплавок
control valve - распределительный клапан; регулирующий клапан
design - конструкция