Oilfield and mining chemicals: Characteristics
Why chemicals must survive heat, pressure and salt downhole
What this tab covers The physical and chemical properties that set its grade, price and uses, with the commercial grades and the standards that define them.Performance under downhole heat, pressure and salinity is what sells. Drilling fluids are specified by density, rheology and filtration loss; production chemicals by tested inhibition in field water; mining reagents by recovery and selectivity in the customer's ore.
Properties that matter commercially
| Property | Value / specification | Why it matters | Source |
|---|---|---|---|
| Barite specific gravity | API drilling grade 4.20, alternate 4.10 since 2010 (API Spec 13A) | Sets mud weight per tonne and price tier | USGS MCS 2026; API Spec 13A via barite tile |
| Thermal stability | polymers and inhibitors rated to well temperatures that can exceed 150 C (indicative) | Deep and high-pressure wells break down cheaper chemistry | indicative |
| Environmental rating (offshore) | OSPAR HOCNF data; PLONOR substances pose little or no risk | Needed to use a chemical offshore in the North-East Atlantic | OSPAR |
| Compatibility with produced water | tested per field | Incompatible inhibitors can form solids or emulsions | indicative |
Commercial grades
- Water-based and oil- or synthetic-based mud systems
- API barite (4.2 and 4.1 SG)
- Corrosion and scale inhibitor packages
- Demulsifiers and H2S scavengers
- Friction reducers and guar gels
- EOR-grade HPAM
- Flotation collectors (xanthates, dithiophosphates) and frothers