In hydraulic fracturing, the gel breaker plays a critical role in determining how efficiently a fracturing fluid can transition from a high-viscosity transport fluid to a low-viscosity flowback fluid.

For many years, ammonium persulfate (APS) and other persulfate-based oxidizers have been widely used as conventional gel breakers. However, their performance is strongly influenced by temperature and activation conditions. This can create challenges in low-temperature formations, where the breaking reaction may become slower and additional activators may be required.

As oil and gas operators increasingly focus on operational safety, environmental performance, fluid cleanup and total treatment cost, eco-friendly low-temperature gel breakers are becoming an attractive alternative to conventional oxidizing breakers.

Sichuan All-Chem Chemical Co., Ltd. has developed AC-GBL2 Eco-friendly Low-temperature Gel Breaker to address these challenges. AC-GBL2 is designed to provide efficient gel breaking across a broad temperature range, with particularly strong performance under low-temperature conditions. After gel breaking, the apparent viscosity of the broken fluid can be reduced to ≤5 mPa·s under the company’s specified test conditions.

Why Gel Breaker Selection Matters in Hydraulic Fracturing

A fracturing fluid needs to perform two apparently conflicting functions.

During pumping and proppant placement, the fluid must maintain sufficient viscosity to transport proppant effectively into the target fracture network.

After the treatment, however, excessive viscosity is undesirable. The fracturing fluid must break efficiently so that the fluid can flow back through the fracture system and minimize polymer residue.

Therefore, an effective gel breaker should provide:

• Controlled viscosity reduction
• Efficient polymer degradation
• Reliable performance at the actual reservoir temperature
• Low residual viscosity after breaking
• Good compatibility with the fracturing fluid system
• Safe and practical handling
• Reasonable overall treatment cost

The challenge becomes more significant in low-temperature wells, where conventional oxidative gel breakers may not provide the desired reaction rate without additional activation.

The Low-Temperature Challenge of Ammonium Persulfate

Ammonium persulfate is a well-established oxidizing gel breaker. It works by generating reactive sulfate radicals that attack and degrade polymer chains in the fracturing fluid.

However, the effectiveness of persulfate-based breakers depends significantly on their thermal decomposition and activation behavior. Research on low-temperature fracturing fluids has also identified the dependence of ammonium persulfate on thermal degradation and radical generation for polymer breakdown.

At relatively low formation temperatures, this can become a practical limitation.

When the temperature is insufficient to activate ammonium persulfate efficiently, operators may need to consider additional activation systems or adjust the breaker formulation. This can increase formulation complexity and introduce another variable into the fracturing-fluid design.

For example, conventional low-temperature oxidative systems may use activators such as reducing agents or amine-based activators to accelerate the breaking reaction.

This creates an important question:

Is the lowest-priced gel breaker actually the lowest-cost solution?

The answer depends on the complete treatment system rather than the purchase price of the breaker alone.

AC-GBL2: Designed Specifically for Low-Temperature Gel Breaking

AC-GBL2 Eco-friendly Low-temperature Gel Breaker was developed by Sichuan All-Chem Chemical Co., Ltd. as a high-efficiency alternative for modern fracturing operations.

Unlike conventional approaches that rely primarily on temperature-dependent persulfate decomposition, AC-GBL2 is designed to deliver rapid and efficient gel breaking under low-temperature conditions.

The product is particularly suitable for polymer-based fracturing fluids, including:

• Self-crosslinking polymer emulsions
• Suspension polymer emulsions
• Polymer powders
• Guar gum-based fracturing fluids
• Other compatible polymer-thickened systems

According to the product information from Sichuan All-Chem, AC-GBL2 demonstrates strong gel-breaking performance across the temperature range and is particularly effective at low temperatures. The broken fluid can achieve an apparent viscosity of ≤5 mPa·s under the specified test conditions.

This makes AC-GBL2 particularly interesting for shallow wells, low-temperature reservoirs and other applications where conventional oxidative breakers may require additional optimization.

Safety Advantage: Moving Beyond Conventional Oxidizing Breakers

Safety is becoming increasingly important in the selection of oilfield chemicals.

Ammonium persulfate is an oxidizing chemical and therefore requires appropriate handling, storage and transportation procedures. For oilfield service companies operating large chemical inventories, the safety classification of individual additives can affect logistics, warehouse management, worker protection and transportation requirements.

AC-GBL2 was developed with a different product philosophy.

The product uses a water-based formulation and is non-flammable. According to the manufacturer’s product information, it is also formulated without VOCs, organochlorine compounds, fluorine, alkylphenols, alkylphenol ethoxylates, nonylphenol and nonylphenol ethoxylates. It is designed with environmental compatibility and biodegradability in mind.

This can provide several practical advantages:

1. Simplified Chemical Handling

A safer formulation can reduce the complexity associated with handling an oxidizing chemical at the wellsite.

2. Improved Storage Considerations

Reducing dependence on strongly oxidizing materials can simplify certain aspects of chemical storage and inventory management, subject to local regulations and site-specific requirements.

3. Better Environmental Profile

As environmental requirements become increasingly important in oil and gas operations, operators are looking for fracturing additives that combine technical performance with improved environmental characteristics.

4. More Suitable for Modern Green Fracturing Strategies

The move toward lower-impact fracturing chemicals is becoming an important part of chemical selection, particularly for operators working under increasingly stringent environmental requirements.

Gel-Breaking Performance: Speed Is Not the Only Metric

A common mistake when evaluating gel breakers is to focus only on how quickly the initial viscosity decreases.

In practical fracturing operations, controlled gel breaking is equally important.

If a breaker reacts too quickly, the fracturing fluid may lose viscosity before proppant placement is completed.

If the breaker reacts too slowly, excessive polymer residue may remain after treatment, potentially affecting flowback and fracture conductivity.

Therefore, the ideal breaker should provide a balanced combination of:

Sufficient fluid stability during pumping + efficient viscosity reduction after treatment.

AC-GBL2 is designed to address this balance, particularly in low-temperature fracturing systems.

Its strong performance with different polymer-based thickeners also gives operators greater flexibility when designing fracturing-fluid systems.

AC-GBL2 vs. Ammonium Persulfate: A Practical Comparison

The following comparison illustrates the major differences that should be considered when selecting a low-temperature gel breaker.

The actual performance and economics of any gel breaker should always be confirmed through laboratory testing using the customer’s specific polymer, crosslinker, water chemistry, temperature and target breaking time.

Cost-Effectiveness: Look at Total Treatment Cost

The price per kilogram or pound of a gel breaker does not tell the entire economic story.

For example, a conventional ammonium persulfate system may involve:

Breaker + activator + additional formulation optimization + operational control

The total chemical cost therefore depends on the entire breaking system.

In contrast, an effective low-temperature gel breaker can potentially reduce the need for additional activation components and simplify formulation development.

This is where AC-GBL2 can offer a potential cost advantage.

The objective is not simply to replace one chemical with another. The objective is to optimize the total cost of the gel-breaking stage while maintaining the required fracturing performance.

For oilfield service companies and fracturing-fluid formulators, this can be particularly important when treating multiple low-temperature wells where small differences in chemical dosage and formulation complexity can accumulate into significant operating costs.

Better Compatibility With Modern Fracturing Fluid Systems

Modern fracturing fluids are becoming increasingly sophisticated.

Depending on the reservoir and treatment design, operators may use:

• Guar gum
• Hydroxypropyl guar
• Crosslinked polymer systems
• Self-crosslinking polymer emulsions
• Suspension polymer systems
• Polymer powders
• Hybrid fracturing-fluid technologies

A gel breaker therefore needs to be evaluated as part of the complete fluid system, rather than as an isolated chemical.

AC-GBL2 has demonstrated applicability to several polymer-based thickening systems, including self-crosslinking emulsions, suspension emulsions, polymer powders and guar gum under low-temperature conditions.

This flexibility allows formulators to investigate its use across different fracturing-fluid architectures.

Where Should AC-GBL2 Be Considered?

AC-GBL2 is particularly worth evaluating in applications where conventional oxidative gel breakers present performance or formulation challenges.

Potential applications include:

Low-Temperature Oil and Gas Wells

Low-temperature formations can create difficulties for conventional temperature-dependent oxidizing breakers. AC-GBL2 is specifically designed to address this application.

Shallow Reservoir Stimulation

Shallow formations often have lower bottom-hole temperatures, making low-temperature gel breaking particularly important.

Tight Oil and Shale Gas

Unconventional reservoirs may require precise control over fracturing-fluid viscosity, proppant transport and post-treatment cleanup.

Polymer-Based Fracturing Fluids

AC-GBL2 can be evaluated with selected guar-based and polymer-based systems.

Environmentally Focused Oilfield Operations

For operators seeking alternatives with improved environmental and handling characteristics, AC-GBL2 provides another option for breaker selection.

How to Evaluate a Low-Temperature Gel Breaker

Before field application, laboratory testing should be performed using the actual fracturing-fluid formulation.

Important evaluation parameters include:

1. Formation temperature
2. Polymer type and concentration
3. Crosslinker type and concentration
4. Breaker concentration
5. Breaking time
6. Initial fluid viscosity
7. Final broken-fluid viscosity
8. Residue after gel breaking
9. Compatibility with formation water
10. Flowback performance

This approach allows the breaker concentration to be optimized rather than simply applying a fixed dosage.

For example, a laboratory program can compare different AC-GBL2 concentrations at the customer’s target temperature and determine the minimum dosage required to reach the desired final viscosity.

This can help optimize both technical performance and chemical cost.

Why Choose AC-GBL2 From Sichuan All-Chem?

Sichuan All-Chem Chemical Co., Ltd. focuses on the development and supply of oilfield chemical solutions, including fracturing-fluid additives, acidizing chemicals and other stimulation chemicals. The company’s R&D team includes experienced technical personnel and researchers from oilfield-related universities and service companies, and the company reports more than 40 developed chemical products and more than 10 patents.

For international customers evaluating AC-GBL2, Sichuan All-Chem can provide technical support based on the customer’s:

• Reservoir temperature
• Fracturing-fluid composition
• Polymer concentration
• Crosslinking system
• Required breaking time
• Target final viscosity
• Field application conditions

Rather than simply recommending a standard dosage, the objective is to identify a suitable breaker concentration and application protocol for the customer’s specific fluid system.

Conclusion: A Smarter Approach to Low-Temperature Gel Breaking

Ammonium persulfate remains an established gel-breaking technology, but its temperature-dependent activation behavior can create challenges in low-temperature fracturing applications.

The next generation of gel breakers should provide more than polymer degradation.

They should combine:

Performance + Safety + Environmental Compatibility + Operational Control + Cost Efficiency.

AC-GBL2 Eco-friendly Low-temperature Gel Breaker was developed around these requirements.

With strong low-temperature gel-breaking performance, applicability to multiple polymer-based fracturing systems, a water-based non-flammable formulation and the potential to simplify conventional breaker/activator systems, AC-GBL2 provides an alternative approach for operators and fracturing-fluid formulators looking to improve both technical performance and overall treatment economics.

For technical specifications, application recommendations or laboratory evaluation samples, please contact Sichuan All-Chem Chemical Co., Ltd.

Learn more about AC-GBL2 Eco-friendly Low-temperature Gel Breaker:
https://www.scall-chemical.com/gel-breaker-ac-gbl2-product/