Encapsulated gel breaker for fracturing in oil fields

Encapsulated gel breaker for fracturing in oil fields is a chemical additive used in oilfield fracturing operations, mainly for controlling the viscosity and gel-breaking time of fracturing fluids.

Encapsulated gel breaker usually consists of a shell and an internal gel-breaking agent. The shell is usually a polymer material capable of withstanding certain pressure and temperature, and the internal gel-breaking agent is a chemical substance capable of decomposing the polymer in the fracturing fluid. During the fracturing operation, the encapsulated gel breaker is injected into the fracturing fluid. As the fluid flows and the pressure changes, the capsule gradually breaks, releasing the internal gel-breaking agent, thereby decomposing the polymer in the fracturing fluid, reducing the viscosity of the fracturing fluid, making it easier to flow back to the ground.

The use of encapsulated gel breaker can effectively control the viscosity and gel-breaking time of the fracturing fluid, improve the effect and success rate of the fracturing operation. At the same time, the encapsulated gel breaker can also reduce the damage of the fracturing fluid to the formation, improve the production and recovery rate of the oilfield.

Choosing the right encapsulated gel breaker for oilfield fracturing operations requires considering the following factors:

1.Fracturing fluid system: Different types of fracturing fluid systems require different types of encapsulated gel breakers. For example, for water-based fracturing fluids, Ammonium persulphate encapsulated gel breaker and potassium persuphate encapsulated gel breakers are usually used; for oil-based fracturing fluids, hydrogen peroxide encapsulated gel breakers are usually used.

2.Gel-breaking time: Gel-breaking time refers to the time required for the encapsulated gel breaker to release the gel-breaking agent. According to the requirements of the fracturing operation, choosing the appropriate gel-breaking time can effectively control the viscosity and gel-breaking effect of the fracturing fluid.

3.Temperature and pressure: Oilfield fracturing operations are usually carried out under high temperature and high pressure, so it is necessary to choose an encapsulated gel breaker that can withstand high temperature and high pressure.

4.Cost and benefit: The prices of different types of encapsulated gel breakers vary, and it is necessary to comprehensively consider the cost and benefit of the oilfield fracturing operation.When choosing a capsule breaker, it is necessary to consider the above factors comprehensively, and choose according to the actual situation. At the same time, laboratory tests and field tests are also required to determine the best type and amount of encapsulated gel breaker.

Here are several common types of encapsulated gel breaker:

1.Ammonium persulphate encapsulated gel breaker: The most commonly used in domestic oil fields currently, it has good delayed-release performance. During fracturing operations, it can maintain a higher viscosity of the gel, which is beneficial for creating fractures and carrying sand. After construction, it can completely break down and hydrate the fracturing fluid, facilitating flowback, reducing construction risks, and minimizing the damage of the fracturing fluid to the conductivity of the supporting fractures.

2.Hydrogen peroxide encapsulated gel breaker: Suitable for oil-based fracturing fluids and can break down at higher temperatures. The hydrogen peroxide encapsulated gel breaker does not rupture immediately during fracturing operations but gradually releases the breaker over a certain period of time, thereby controlling the rate and degree of breakdown.

Different encapsulated gel breaker are suitable for different fracturing fluid systems and construction conditions and need to be selected based on actual circumstances. When selecting encapsulated gel breaker, it is recommended to consult a professional fracturing service company or chemical additive supplier for the best solution.

When using encapsulated gel breaker, the following points need to be noted:

1.Temperature: The operating temperature range of the encapsulated gel breaker is usually between 30-90°C. Below 30°C or above 90°C, the encapsulated gel breaker may not work properly or have poor performance.

2.Pressure: The operating pressure of the encapsulated gel breaker is usually between 20-70MPa. Below 20MPa or above 70MPa, the encapsulated gel breaker may not work properly or have poor performance.

3.Capsule integrity: Before using the encapsulated gel breaker, it is necessary to check the integrity of the capsule to ensure that the capsule is not damaged or leaked.

4.Compatibility with other additives: When using the encapsulated gel breaker, its compatibility with other additives needs to be considered to avoid adverse reactions.

5.Storage conditions: The encapsulated gel breaker needs to be stored in a dry, cool, and ventilated place, away from direct sunlight and high temperatures.

Safety precautions: When using the encapsulated gel breaker, relevant safety regulations need to be followed, such as wearing protective gloves, goggles, etc., to avoid contact with the skin and eyes.

In conclusion, when using the encapsulated gel breaker, it is necessary to carefully read the product manual, understand its performance and usage method, and strictly follow relevant safety regulations and operating procedures.

We Weifang Totpion Chemical Industry Co.,Ltd are the professional encapsulated gel breaker and capsulated sustained-release additives production enterprises and supplier. Please visit our website www.toptionchem.com for more information. If you have any requirement, please do not hesitate to contact us.