Product Details

Sulfonated Phenolic Resin (SMP)

1. Product Overview

Sulfonated Methyl Phenol Resin (SMP) is a high-temperature and salt-resistant fluid loss reducer synthesized from phenol, formaldehyde and sulfite via condensation reaction. It is specifically developed for medium-deep, deep and ultra-deep well drilling operations, with excellent filtration control, rheology adjustment and wellbore stabilization performance under high-temperature and high-pressure conditions. It is often used in combination with sulfonated lignite and sulfonated asphalt to form high-performance water-based drilling fluid systems.

2. Appearance & Technical Specifications

Core Technical Parameters

3. Core Functions

3.1 Viscosity Enhancement & Fluid Stability

SMP increases the viscosity and consistency of drilling fluids, reducing phase separation and maintaining stable rheological properties under complex conditions.

3.2 High-Temperature Resistance Improvement

With excellent thermal stability, SMP effectively prevents thermal degradation of drilling fluid properties at elevated temperatures, ensuring reliable performance in deep and ultra-deep wells.

3.3 Contaminant Accumulation Suppression

SMP inhibits the deposition of contaminants in the drilling fluid system, keeping the fluid clean and stable throughout the drilling operation.

3.4 High-Temperature & Salt-Resistant Fluid Loss Control

SMP delivers superior filtration control performance under high-temperature, high-pressure and high-salinity conditions. It forms a thin, tough and lubricious filter cake on the borehole wall, significantly reducing fluid loss and preventing well collapse.

4. Product Application

SMP is widely used in drilling fluid systems for medium-deep, deep and ultra-deep wells. It provides:

· Gentle lubrication and effective cooling for drill bits

· Stable wellbore integrity through mechanical support and filter cake formation

· Optimal control of drilling fluid column pressure

· Excellent performance in high-density and saturated brine drilling fluid systems

· Wide compatibility with various water-based mud formulations

5. Product Advantages

✅ Low Dosage & High EfficiencyExcellent performance can be achieved with low addition rate, ensuring cost-effectiveness.

✅ Outstanding High-Temperature & Salt ResistanceStable performance under high-temperature, high-pressure and high-salinity conditions, suitable for complex deep well operations.

✅ Excellent Filter Cake PerformanceForms a thin, tough and lubricious filter cake with good anti-collapse and wall-stabilizing properties.

✅ Flexible Product FormsAvailable in both powder and liquid forms, with customizable options to meet different application requirements.

6. Packaging Specification

· Standard: 25 kg per bag in paper-plastic composite bags, or 25 kg per drum in industrial-grade barrels.

· Custom packaging materials and specifications are available upon request.

7. Storage & Transportation

Store in dry, cool and ventilated warehouses during storage and transportation. Keep away from fire and heat sources, and avoid direct sunlight. Moisture exposure does not affect product performance.

8. Disclaimer & Technical Support

All specifications and descriptions in this document are for reference only. The product shall be used in accordance with the customer’s actual working conditions and technical requirements. Customized formulations and professional technical solutions are available upon request.

Application Cases of Sulfonated Phenolic Resin for Drilling Fluids

1. Extreme High-temperature (230℃) Filtration Control and Colloid Protection Case for Ultra-deep Wells

Case Background: Ultra-deep wells in Tarim and Sichuan ultra-deep block have extreme bottom hole temperature of 210–230℃, long-term high-temperature aging and severe colloid failure of drilling fluid. Conventional filtrate reducers and lignite materials are prone to thermal crosslinking and high-temperature thickening failure under ultra-high temperature, resulting in sharp increase of HTHP filtration, loose and thick filter cake, frequent wellbore spalling and collapse, which seriously restricts safe drilling of ultra-high temperature ultra-deep wells.

Application Formula & Dosage: On the basis of high-temperature polysulfonate water-based drilling fluid system, 2.0%–3.0% sulfonated phenolic resin was added as the core high-temperature filtration reducer and colloid protector, compounded with a small amount of high-temperature stabilizer to build a 230℃ ultra-high temperature resistant drilling fluid system.

Application Effect: The product features stable sulfonated molecular structure, excellent ultra-high temperature resistance, no thermal thickening or performance attenuation after long-term aging at 230℃. It can effectively protect drilling fluid colloids, significantly reduce HTHP filtration loss, and optimize filter cake to be thin, dense and smooth. It inhibits clay hydration and wellbore enlargement, maintains stable rheological parameters of the system throughout the cycle, completely solves the ultra-high temperature failure problem of conventional treatment agents, and ensures long-cycle safe drilling of ultra-deep extreme high-temperature wells.

2. Anti-pollution System Stabilization Case for High-salt and High-calcium Contaminated Formations

Case Background: Complex salt-gypsum and brine formations have high salinity, severe calcium and magnesium ion pollution and strong electrolyte interference. Conventional polymer and lignite treatment agents are easy to flocculate and deactivate, resulting in system thickening, excessive filtration loss and deteriorated mud cake quality, which easily cause wellbore shrinkage, collapse and leakage, failing to adapt to long-cycle drilling in high-salt complex formations.

Application Method & Dosage: Sulfonated phenolic resin with excellent salt and calcium resistance was applied at 1.8%–2.5% in saturated brine drilling fluid system. It is compounded with anti-salt polymers to jointly stabilize rheology and filtration performance under full salinity pollution.

Application Effect: The product has strong electrolyte resistance and anti-ion interference ability, no flocculation or gel breaking under high salt and high calcium composite pollution. It can stably control system viscosity and shear force, effectively reduce medium and high temperature filtration loss, maintain compact and smooth filter cake. It inhibits salt layer dissolution and creep deformation, ensures long-term stable operation of drilling fluid system, and solves the technical problems of system instability and frequent downhole complex accidents in high-salt contaminated formations.

3.  Rheological Stability Optimization Case for High-density Polysulfonate System in Ultra-deep Wells

Case Background: High-density polysulfonate drilling fluid (1.80–2.35 g/cm³) for ultra-deep high-pressure wells has high solid content, serious temperature-sensitive thickening and poor colloidal stability. Under long-term high-temperature downhole conditions, the system is prone to sharp viscosity increase, high circulating pump pressure, barite settlement and poor wellbore cleaning, which brings great hidden dangers to safe drilling of high-pressure ultra-deep wells.

Application Dosage: 2.0%–2.8% sulfonated phenolic resin was added to the high-density polysulfonate drilling fluid system, used for high-temperature colloid protection and rheological optimization of high-solid systems.

Application Effect: The product has excellent high-temperature colloid protection and viscosity stabilization effects on high-density drilling fluid. It can optimize the dispersion state of solid particles, inhibit high-temperature crosslinking and thickening of organic agents, keep system rheology within a reasonable range, reduce circulating friction and pump pressure, and effectively avoid weighting material settlement and cuttings accumulation. The downhole working condition is stable, the complex disposal rate is significantly reduced, and the drilling efficiency of high-pressure ultra-deep wells is greatly improved.

4. High-temperature Anti-sloughing Well Stabilization Case for Deep Fractured Broken Formations

Case Background: Deep fractured and broken formations in Sichuan and Chongqing blocks have developed micro-fractures, fragile lithology and active formation water. Under long-term high-temperature immersion, shale hydration spalling and wellbore enlargement are severe. Conventional treatment agents have poor high-temperature plugging and anti-sloughing performance, failing to effectively block micro-fractures, resulting in continuous filtrate invasion and poor wellbore stability.

Application Method & Effect: Sulfonated phenolic resin was applied at 1.5%–2.2% in deep well high-temperature anti-sloughing drilling fluid system. It can form a dense polymer protective film on shale and fracture surfaces at high temperature, effectively plug micro-fracture channels, reduce filtration loss, inhibit clay hydration and dispersion, and stabilize wellbore morphology. It has good high-temperature compatibility, no performance degradation after long-term downhole aging, and ensures safe and stable drilling of deep broken and fractured formations.

5.  Long-term Performance Stability Case for Offshore Ultra-deep High-temperature Wells

Case Background: Offshore ultra-deep wells feature seawater-based preparation, long open-hole soaking time, high bottom hole temperature and strict long-term performance stability requirements. Conventional high-temperature agents are prone to aging failure and performance fluctuation in seawater high-salt and high-temperature composite environments, resulting in deteriorated mud cake and increased downhole leakage and collapse risks, failing to meet offshore continuous drilling requirements.

Application Method & Effect: The conventional dosage is 1.8%–2.5%. Sulfonated phenolic resin has excellent seawater adaptability, high-temperature aging resistance and long-term stability. It can continuously stabilize the filtration and rheological properties of seawater-based drilling fluid, optimize mud cake compactness in long-cycle high-temperature environments, effectively prevent wellbore instability and micro-leakage. It meets offshore environmental protection and high-standard drilling requirements, and ensures long-cycle safe and stable construction of offshore ultra-deep high-temperature wells.