Binary Compound Flooding Technology

Binary Compound Flooding Technology

1、The Technology Mechanism

Binary compound flooding belongs to chemical flooding technology. The active agent in the compound system can greatly reduce the interfacial tension of oil and water in the formation and improve the oil displacement efficiency. The polymer in the compound system can control profile efficiently, expand the sweep volume and control the flow rate of subsequent chemicals. Both of them have a good synergistic effect on production increase. Compared with single polymer flooding, Binary compound flooding can improve recovery rate by 5%. Compared with active water flooding, fluid channeling can be prevented. Compared with the ternary compound flooding, it has obvious advantages：

Reduce the emulsification of the output liquid and processing cost.

Prevent the scaling. Easy to operate and inject.

Reduce scale damage to the formation.

2、Injected Agents

（1）Ion Pair Composite Surfactant

This kind of product is obtained by modification of the ionic surfactant HD-100. HD-100 is the main agent of the products, the structure of the monomers link is adjusted, while maintaining its excellent ultra-low interfacial tension characteristics and the advantages of strong universality, and compound with some of the sulfonate surfactants and non-ionic surfactant. The oil washing capacity and anti-adsorption capacity of the modified products have been greatly improved, and the anti-high salinity and anti-high calcium and magnesium capacity of the products have been increased.

According to the situation of oilfield development, we have developed the anionic-nonionic surfactant which is used in conjunction with petroleum sulfonate. This kind of product is mainly composed of alkyl benzene sulfonate and olefin sulfonate as the main body, and several different kinds of non-ionic surfactants are added. By using the synergistic effect with petroleum sulfonate to realize the requirement of ultra-low interfacial tension, good desorption and oil washing capacity, the purpose of improving the recovery is achieved. At the same time, this series of surfactant products are more flexible and meet the requirements of current oilfield technology development, and can be developed and matched according to different oil and water systems in each block.

（3）Environment-friendly Fatty Acid Surfactant

To expand the type of surfactant for oil displacement, to effectively and rationally utilize renewable resources, to seek environmental-friendly surfactant products, to better protect our survival environment, the company firmly implements the view of sustainable development. It has been committed to the research and development of green environment-friendly active agent，and has been successfully developed environment-friendly surfactants for oil displacement which use fatty acid sulfonate as the main agent.

This kind of product is processed and compounded with regenerated fatty acid used as the main raw material. It has excellent ultra-low interfacial tension, anti-calcium and magnesium ability, good thermal stability and good adaptability. At the same time, the production of products is not limited by natural resources, the products are easy to biodegrade, and the production and application are free of emissions and pollution-free. So it is a promising product.