New Power of Oil Extraction: Technical Analysis of Micro nano Bubbles in Oilfield Injection Wells

Against the backdrop of sustained global energy demand growth, oil, as an important energy resource, has attracted much attention for its extraction efficiency and cost control. Traditional oil recovery techniques have gradually exposed some limitations when facing increasingly complex reservoir conditions. At this time, micro nano bubble technology, as an emerging means of oil recovery assistance, is quietly emerging in the field of oilfield injection, injecting "new power" into oil recovery engineering.

Key assistance in improving crude oil recovery efficiency

The improvement of crude oil recovery rate has always been one of the core goals in the field of oil extraction. Micro nano bubbles play a significant role in this field due to their unique physical properties. Its tiny size has become a powerful tool for conquering the tiny pores and throats in oil reservoirs. These areas that are difficult to reach with conventional water injection have been successfully breached under the "attack" of micro nano bubbles. Through the Jamin effect, micro nano bubbles form effective blockages in the high permeability layer, like installing a "flow restriction valve" on the high permeability layer, forcing the injected water to change its path and flow towards the low permeability layer. This clever "turning strategy" greatly expands the affected volume of water injection, and the crude oil that was originally dormant in the low-permeability layer is successfully awakened and involved in the extraction process, thereby significantly improving the oil recovery rate.

At the same time, the charges carried on the surface of micro nano bubbles are like "molecular keys" that can precisely interact with polar substances in crude oil. This effect is like a magical 'lubricant', greatly reducing the interfacial tension between oil and water. The crude oil that was originally tightly attached to the surface of the rock becomes easier to peel off with a decrease in interfacial tension, greatly increasing its fluidity and flowing more smoothly towards the oil production well, further improving the degree of crude oil recovery.

The strong guardian of water quality for injection

High quality water injection quality is a key factor in ensuring the long-term stable operation of oilfield water injection wells. However, impurities and microorganisms in conventional water injection often become the "culprits" of formation blockage, seriously affecting the effectiveness of water injection. Micro nano bubble technology has become a "secret weapon" for improving the quality of water injection.

Micro nano bubbles have strong oxidizing properties, acting as "cleaning guardians" in water, capable of rapidly oxidizing organic and reducing substances in water. For bacteria and other microorganisms in water, micro nano bubbles are even more ruthless, killing them in one fell swoop and preventing the growth of biofouling in injection wells and formations from the root. Moreover, the air flotation effect of micro nano bubbles is also very significant. It is like an efficient 'suspended particle transporter', bringing suspended particles from the water to the surface for easy removal by personnel. After treatment with micro nano bubbles, the injection water significantly reduces impurities and microorganisms, effectively avoiding contamination and blockage of the formation, providing a solid guarantee for the long-term stable operation of the injection well.

Micro nano bubble 'super strong penetration' effect

Excessive water injection pressure has always been a challenge in the process of oilfield development, which not only consumes a large amount of energy but also poses a threat to the service life of water injection wells. The application of micro nano bubble technology provides new ideas for solving this problem.