Product Details

Sulfonated Asphalt Powder FT

1. Product Introduction

Sulfonated Asphalt Powder FT is an anionic polymer modified from petroleum asphalt through chemical processes such as sulfonation and emulsification. Its molecular structure contains C-C bonds and C-S bonds with high bond energy, ensuring stable performance.

2. Appearance & Physical Properties

3. Core Technical Parameters

4. Core Functions & Performance Features

4.1 Excellent Water Dispersibility

It exhibits good dispersibility in water without agglomeration or floating, and can be uniformly distributed in water-based mud.

4.2 Superior Shale Inhibition & Wellbore Stabilization
The insoluble asphalt substances dispersed in drilling fluid can adsorb on the surface of mud shale to form a thin, tough, low-permeability hydrophobic oil film. It seals formation pores and micro-fractures under pressure difference, reducing filtrate invasion. The cationic groups effectively inhibit shale hydration and expansion, preventing mud shale spalling and collapse, thus stabilizing the wellbore.

4.3 High-Efficiency Plugging Performance
It can be used in combination with various lost circulation materials to significantly improve the plugging effect on lost circulation zones.

4.4 Reservoir Protection
It effectively reduces the pollution of drilling fluid to oil and gas reservoirs, protects reservoir permeability, and minimizes formation damage.

4.5 No Viscosity Increase
It does not cause an increase in drilling fluid viscosity, making it particularly suitable for the preparation of high-density drilling fluids and completion fluids.

4.6 Excellent Thermal Stability
With thermal stability exceeding 220℃, it is suitable for drilling and completion fluid systems in high-temperature deep wells.

4.7 Salt & Calcium Tolerance
It is compatible with various drilling and completion fluid systems such as fresh water, seawater, and saturated brine, with strong anti-pollution ability.

4.8 Good Compatibility
It has excellent compatibility with other drilling fluid additives and can be directly added to various drilling and completion fluids, with a recommended dosage of 1%–3%.

5. Product Application

• All types of water-based drilling and completion fluid systems

• Drilling operations in shale formations and unstable easy-collapse formations

• High-temperature deep well and ultra-deep well drilling

• Drilling in salt-gypsum beds and high-salinity formations

6. Packaging Specification
Standard: 25kg/bag in composite paper bags. Customizable packaging specifications are available according to client requirements.

7. Storage & Transportation
Store in a cool, dry place, protected from moisture, direct sunlight, fire sources and strong oxidizing agents.

8. Precautions

Wear protective gloves and masks during use to avoid dust inhalation and skin contact. In case of accidental contact with eyes or skin, rinse immediately with plenty of clean water and seek medical attention if necessary.

9. 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 solutions are available upon request.

Application Cases of Sulfonated Asphalt in Drilling Fluids

1. Wellbore Stabilization and Anti-collapse Case for Fractured Broken Formations

Case Background: Carbonate and brittle shale fractured formations are developed with numerous micro-fractures and pore gaps, featuring concentrated in-situ stress and severe wellbore instability risks. During drilling, drilling fluid filtrate easily invades formation micro-fractures, causing hydration spalling, block falling and wellbore collapse. Conventional plugging agents have poor deformability and low filling efficiency for tiny fractures, resulting in large wellbore enlargement rate and frequent downhole complex accidents.

Application Formula & Dosage: On the basis of conventional polymer and polysulfide drilling fluid systems, 2.0%–3.0% sulfonated asphalt is added. It adopts flexible deformation plugging technology to adapt to different micro-fracture apertures and form compact plugging layers.

Application Effect: Sulfonated asphalt has excellent flexible plugging and deformation filling performance. It can fully fill and plug formation micro-fractures, effectively prevent drilling fluid filtrate from invading the stratum, inhibit shale hydration and dispersion, and significantly reduce wellbore enlargement rate. It stabilizes wellbore morphology throughout the drilling cycle, avoids downhole collapse and block falling accidents, greatly improves drilling safety of fractured and broken formations, and ensures continuous and efficient drilling construction.

2.  High-temperature Filtration Reduction and Wellbore Protection Case for Deep HTHP Wells

Case Background: Deep and ultra-deep well HTHP formations have bottom hole temperatures of 150–180℃ and high downhole pressure. Conventional filtrate reducers are prone to high-temperature aging failure, leading to increased HTHP filtration loss, loose and brittle mud cake. Excessive filtrate invasion causes reservoir hydration damage and wellbore instability, which cannot meet the long-cycle stable drilling requirements of high-temperature deep wells.

Application Method & Dosage: 2.5%–3.5% high-temperature resistant sulfonated asphalt is added to high-density HTHP drilling fluid systems. With stable sulfonated molecular structure, it resists high-temperature thermal aging, optimizes mud cake quality and controls HTHP filtration loss.

Application Effect: Sulfonated asphalt has outstanding high-temperature stability, no performance attenuation after long-term HTHP rolling. It can adsorb on the mud cake surface to form a smooth, compact and flexible high-quality mud cake, effectively reduce HTHP filtration loss of drilling fluid, reduce filtrate invasion depth, and protect the wellbore from high-temperature hydration damage. It stabilizes drilling fluid rheological and filtration performance in high-temperature environments, reduces downhole complex risks, and ensures safe and stable drilling of ultra-deep high-temperature wells.

3. Salt Resistance, System Stabilization and Anti-collapse Case for High-salt Complex Formations

Case Background: Salt-gypsum and high-mineralization formations have severe ion interference and strong electrolyte pollution. Conventional plugging and anti-collapse agents are sensitive to salt, prone to molecular precipitation and performance failure, resulting in deteriorated drilling fluid filtration performance, poor wellbore protection effect, and frequent wellbore instability and collapse problems in salt-bearing formations.

Application Dosage: 2.0%–3.2% salt-tolerant sulfonated asphalt is added to high-salt drilling fluid systems. Relying on strong salt resistance and electrolyte interference resistance, it maintains stable plugging and filtration reduction performance in high-mineralization environments.

Application Effect: The sulfonated asphalt modified by sulfonation treatment has strong salt tolerance, no demulsification or precipitation in high-salt systems. It can effectively optimize mud cake structure, reduce atmospheric and HTHP filtration loss, and continuously plug formation micro-pores and fractures. It solves the technical problem of poor wellbore stability in salt-gypsum formations, stabilizes the overall performance of salt-contaminated drilling fluid, and realizes long-term safe drilling in high-salt complex formations.

4. Mud Cake Optimization, Anti-sticking and Efficiency Improvement Case for Directional Horizontal Wells

Case Background: Directional and horizontal wells have complex well trajectories and large wellbore curvature. The drill string is in long-term contact and friction with the wellbore mud cake. Conventional drilling fluids form rough and thick mud cakes, leading to high downhole friction torque, serious stick-slip vibration, and high risk of differential pressure stuck pipe during tripping and casing running, which restricts the improvement of directional drilling efficiency.

Application Method & Effect: Sulfonated asphalt is added at a dosage of 1.8%–2.8% in directional horizontal well drilling fluid systems. It can optimize mud cake thickness and smoothness, form a dense and smooth lubricating mud cake, reduce friction coefficient, and prevent differential pressure sticking.

5. Low-damage Reservoir Protection and Plugging Case for Water-based Drilling Fluids

Case Background: Low-permeability tight reservoirs have tiny pore throats and fragile reservoir structures. Conventional plugging agents have large particle sizes and poor matching, which easily cause residual blockage of reservoir pore throats, reduce core permeability recovery rate, and cause permanent reservoir damage, failing to meet low-damage protective drilling requirements.

Application Method & Effect: The conventional dosage is 1.5%–2.5%. Sulfonated asphalt has reasonable particle gradation and good deformation adaptability. It can form temporary plugging films on the wellbore surface to effectively block reservoir pore throats and prevent drilling fluid solid-liquid phase invasion. After completion, the plugging layer is easy to break and remove, with high reservoir permeability recovery rate and low comprehensive damage. It realizes efficient plugging and low-damage reservoir protection of water-based drilling fluids.