Primary Emulsifier
Primary Emulsifier is typically an organic fatty acid derivative or modified tall-oil–based surfactant that provides strong emulsification when mixed with base oil and brine.It ensures that water droplets are uniformly dispersed within the continuous oil phase, giving the mud excellent stability and rheological balance.
It is a specially formulated surfactant-based chemical used in Oil-Based Mud (OBM) and Synthetic-Based Mud (SBM) systems. Its main function is to create and stabilize a water-in-oil emulsion, which is essential for the performance and stability of the drilling fluid under demanding downhole conditions.
1. Emulsion Stability
- Provides high emulsion stability even at high temperatures (HPHT wells).
- Prevents separation of oil and water phases.
- Helps maintain mud homogeneity for long durations.
2. Enhances Mud Rheology
- Contributes to controlled plastic viscosity and yield point.
- Improves overall fluidity and carrying capacity.
3. Improves Filtration Control
- Works synergistically with secondary emulsifiers and wetting agents.
- Minimizes filtrate loss through formation.
- Helps build a tight, thin filter cake.
4. Improves Electrical Stability (ES)
- Significantly increases ES readings, indicating strong emulsion bonding.
- Higher ES ensures better contamination resistance.
5. Thermal Stability
- Performs well under high temperature and high pressure conditions.
- Protects the mud system from thermal degradation.
Specification
| Parameters | Results |
|---|---|
| Appearance | blackish liquid |
| Specific gravity | 0.92 to 0.96 |
| Acid value mg Koh/g | 80 to 85 |
| Flash point | 120 ‘C |
| Solubility in water | Insoluble |
| Vegetable oil content | Nil |
| Asphaltic material content | Nill |
| Active ingredients | more than 70 % |