Iron Control
Iron Control
Application & Uses
Iron Control Liquid is designed primarily for:
Matrix Acidizing
Used as an additive in acidizing fluids to control dissolved iron generated during contact between acid and tubulars, scale or formation minerals.
Well Stimulation
Helps minimize secondary iron precipitation during stimulation operations as the injected acid reacts and becomes spent.
Wellbore Cleaning
Suitable for treatment fluids used to remove rust, iron oxide deposits and mineral scale from tubing and associated equipment.
Acid Scale Removal
Can be incorporated into acid descaling formulations where dissolution of iron-containing deposits is expected.
Pickling / Tubing Cleaning
Useful during acid pickling and pre-treatment of tubing where significant quantities of iron may enter the cleaning solution.
Acid Pre-Flush
May be incorporated into selected pre-flush formulations where iron stabilization is required prior to the main acid treatment.
Dosage & Directions for Use
Procedure for effective IRON CONTROL during acidic treatment:
- Expected dissolved iron concentration
- Ferric-to-ferrous iron ratio
- Acid concentration
- Type of acid system
- Formation mineralogy
- Calcium concentration
- Bottom-hole temperature
- Contact time
- Amount of rust and iron scale present
- Shut-in time
- 1-5% by volume of the acid treatment fluid
- may be evaluated as an initial dosage range.
Typical Treatment Dosage Guidelines
| Expected Iron Loading | Suggested Starting Evaluation |
|---|---|
| Low | 1-2% v/v |
| Moderate | 2-3% v/v |
| High | 3-5% v/v |
| Very high / severe iron contamination | Laboratory determination required |
Technical Specifications & Properties
| Property | Typical Value |
|---|---|
| Appearance | Clear to slightly hazy liquid |
| Colour | Colourless to pale yellow |
| Odour | Mild |
| pH, neat | Typically <2 |
| Specific Gravity @ 25°C | Approx. 1.15-1.25 |
| Solubility in Water | Completely miscible / dispersible |
| Flash Point | Not normally applicable for aqueous formulation |
Recommended Industrial & Shipboard Areas
RXSOL Iron Control Liquid is compatible in systems using following oil well additives:
- Hydrochloric acid systems
- Organic acid systems
- Acid scale removers
- Corrosion inhibitors
- Non-emulsifiers
- Surfactants
- Mutual solvents
- Selected anti-sludge additives
- Selected stimulation additives
A laboratory compatibility test is strongly recommended before field use.
Product Description & Chemical Profile
Iron Control Liquid is a concentrated liquid iron-control additive developed for use in oilfield acidizing, well stimulation, well cleaning and related chemical treatment operations.
The product is based on a synergistic combination of organic active compounds, providing effective complexing and sequestration of dissolved iron. During acidizing operations, iron may be introduced into the treatment fluid through dissolution of rust, corrosion products, mill scale, iron-containing deposits, tubulars and formation minerals.
As the acid becomes spent and the pH of the treatment fluid increases, dissolved ferric iron may form insoluble iron-containing precipitates. These precipitates can contribute to formation plugging, permeability impairment, sludge formation and deposition within the wellbore and production system.
Iron Control Liquid complexes dissolved iron and assists in maintaining it in a soluble or dispersed form during the treatment and subsequent fluid recovery.
The concentrated liquid formulation offers convenient handling, rapid mixing and easy incorporation into acid treatment packages.
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