Nano microsphere oil displacement agent:

Nanospheres in Enhanced Oil Recovery (NER) are a technology used to enhance oil recovery by suspending ultrafine particles in water.

Nano-microsphere oil displacement agent is a kind of biomolecular oil displacement agent, which is mainly composed of nano-polymer microspheres. These microspheres have a very small size, usually only a few nanometers to tens of nanometers in diameter. This kind of microsphere can improve its affinity to oil by adjusting its physical and chemical properties and surface adsorption properties, and achieve enhanced oil displacement effect in oil Wells.

Specifically, the nanosphere displacement agent makes the microsphere adhere to the surface of the oil well rock by adjusting the surface chemical properties and size of the microsphere. In this way, the oil in the pores of the rock will be adsorbed by the microspheres and then gradually move towards the wellhead through artificial or natural subsidence, thereby improving the recovery efficiency of the well.

Compared with the traditional chemical flooding agent, the nano-microsphere flooding agent has the advantages of less use, non-toxic and harmless, and easy to use. However, it is still necessary to strengthen scientific research and technical optimization in practical application to improve its application effect.

The role of nano-microsphere oil displacement agent in oilfield exploitation

mainly includes the following aspects:

1. Improve oil recovery: nano-sphere oil displacement agent can enhance the flow of crude oil in the pores of oil Wells, reduce the adhesion between crude oil and rock and the interfacial tension between oil and water, so as to promote the flow and collection of crude oil in the pores. It can change the surface characteristics of oil well rock, enhance the adsorption and displacement of crude oil, and improve oil recovery.

2. Improve displacement effect: nano-sphere displacement agent can make crude oil form a emulsion colloid system in the water phase, improve the dissolubility of crude oil by generating emulsion or colloid, reduce the mutual obstruction between oil and water, and improve the displacement effect. It can change the properties of the interface between the water phase and the oil phase, increase the stability of the emulsifier and the dispersion of the colloidal particles, so that the displacement agent can better interact with the crude oil.

3. Reduce oil well plugging: Nano-sphere oil displacement agent has a small size, can enter the rock pores, fill small pores and cracks, reduce the problem of oil well plugging. It can fill the fine voids of rock pores, reduce the resistance of fluid flow, and improve the permeability and permeability of crude oil flow.

4. Environmental friendly and economic benefits: compared with traditional chemical flooding agents, the use of nano-microsphere flooding agents is less, non-toxic and harmless, and less polluting to the environment. In addition, because of its efficient displacement effect, it can improve the efficiency and economic benefit of oil field exploitation.

5. It should be noted that the application of nano-sphere oil displacement agent is still in research and practice, and the technical parameters need to be optimized and adjusted according to the specific situation in practical application.