The main principles of the experimental studies to substantiate the effectiveness of surfactant-polymer flooding for the conditions of White Tiger field

UDK: 622.276
DOI: 10.24887/0028-2448-2022-8-76-80
Key words: surfactant-polymer core flooding, White Tiger field, screening, thermal stability, viscosity, displacement efficiency, laboratory experiments, increasing oil recovery
Authors: E.V. Kudin (Vietsovpetro JV, the Socialist Republic Vietnam, Vung Tau), I.V. Kurguskina (Vietsovpetro JV, the Socialist Republic Vietnam, Vung Tau), Nguyen The Dzung (Vietsovpetro JV, the Socialist Republic Vietnam, Vung Tau)

One of the main method for field development for the last decades is the reservoir flooding technique. Regardless of the efficiency, this method allows recovering only insignificant volume of reserves and, therefore, requires the detailed studying in terms of increasing its efficiency, especially considering the natural depletion of the pay zones. To maintain the achieved rates of Lower Miocene oil production in White Tiger field, it is necessary to consider the possibility of applying various methods of enhanced oil recovery (EOR). One of the promising EOR methods is flooding with surfactants and polymers (SP flooding). This type of flooding refers to one of the most effective EOR methods with the wide applicability range, explaining the growing interest to study its capabilities. SP flooding technology has a high potential for additional recovery of immobile oil (15-30%), which cannot be recovered by the waterflooding method used in the field. The North Dome of White Tiger field has been identified as the most promising in terms of SP flooding application. To create an effective surfactant-polymer composition for the conditions of the studied object, as well as to determine the most effective solutions, systematization and detailed consideration of the main provisions of experimental laboratory studies for application to the conditions of White Tiger field are required.

The analysis of existing methodical approaches to carrying out laboratory research during the implementation of the SP flooding technology was carried out. The article provide the sequence of actions and procedures for creating an effective surfactant-polymer composition with the analysis and development of practical recommendations aimed at improving oil recovery of clastic reservoirs of White Tiger field.

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