Sulfonated Lignite (SMC) | Drilling Fluid Fluid Loss Reducer
1. Product Introduction
Sulfonated Lignite (SMC) is a high-efficiency additive for water-based drilling fluids. It is produced by cross-linking lignite humic acid with sulfonic acid groups (-SO₃Na) and chromium salts.
This product features three core functions: viscosity reduction, fluid loss control and borehole collapse inhibition, with excellent cost performance. It has great compatibility with various drilling fluid additives including Sodium Carboxymethyl Cellulose (CMC), SPNH, Xanthan Gum and Potassium Polyacrylate (K-PAM), and will not cause adverse chemical reactions. As a versatile and reliable multifunctional treatment agent, it is widely used in water-based drilling fluid systems.
2. Product Applications
2.1 Functions in Drilling Fluid
SMC is mainly used as a fluid loss reducer and viscosity stabilizer for water-based drilling fluids. It can effectively control mud fluid loss, improve the compactness and smoothness of filter cake, and inhibit the hydration, dispersion and expansion of clay minerals.
Under high temperature and high salinity downhole conditions, it prevents mud thickening, performance degradation and solid phase precipitation. It maintains stable rheological properties of drilling fluid throughout the whole drilling process to ensure continuous and efficient operations.
2.2 Application Scenarios
It is widely applied in conventional wells, medium-deep wells, directional wells and complex high-salinity oil and gas reservoirs. It is compatible with fresh water, salt water and saturated salt water drilling fluid systems. It can be blended with common oilfield additives to prepare high-temperature resistant and highly stable mud systems for complex downhole working conditions.
3. Technical Specifications
sheet
| Test Item | Standard Index | Typical Parameter |
|---|---|---|
| Appearance | Dark brown free-flowing powder without caking | Dark brown powder |
| Water-soluble Humic Acid (Dry basis) (%) | ≥45.0 | 48%～55% |
| Temperature Resistance | ≥150℃ | 150℃～180℃ |
| Moisture Content (%) | ≤10.0 | ≤10.0 |
| pH Value (1% Aqueous Solution) | 8.0～11.0 | 8.0～11.0 |
4. Product Advantages
- Reliable high temperature resistance: Stable performance without degradation at 150℃-180℃, perfectly suitable for high-temperature environments of medium and deep wells.
- Superior fluid loss control: Greatly reduce drilling fluid filtration, and form dense, impermeable and high-quality filter cake to stabilize wellbore and guarantee downhole integrity.
- Excellent salt and calcium resistance: Remains stable without performance deterioration in formation water with high salinity and calcium content, ideal for complex salt-bearing oil and gas reservoirs.
- Good compatibility: Fully compatible with all conventional water-based drilling fluid additives, bringing no negative impact on mud system.
- High cost performance: Stable quality and low comprehensive application cost, the preferred additive for large-scale conventional and medium-deep well drilling.
5. Packaging & Storage
Packed in 25kg paper-plastic woven bags with good sealing and moisture-proof performance.
Store the product in a dry, cool and well-ventilated warehouse. Keep it away from moisture, rain and long-term humid environment to prevent caking. Under standard storage conditions, the product can maintain stable performance for a long time.
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