Table 6.
Minerals in drilling waste samples
| Minerals | Drilling fluid solids (%) | Drill cuttings (%) | Drill cuttings (%) | Drilling fluid dried powder solids (%) | |
|---|---|---|---|---|---|
| Wilke et al. (2015) | Sawaengpol and Wannakomol (2017) | ||||
| Silurian and Ordovician shale, Poland | Upper Cambrian Alum shale, Denmark | Lower Jurassic Posidonia shale, Germany | Thailand | ||
| Quartz | 24.6 | 29.2 | – | 8.9–25.6 | 43.83 |
| Barite | 10.4 | 13.3 | – | 5.1 | 1.39 |
| Calcite | 35.8 | 43.6 | – | – | 14.21 |
| Dolomite | 2.8 | 3.4 | – | – | – |
| Sylvite | 11.0 | – | – | – | – |
| Muscovite-2M1 | 12.7 | 10.1 | 41.1–43.7*) | 7.0–25.5*) | – |
| Orthoclase | 2.7 | – | 6.3 | – | – |
| Barium chloride | – | 0.5 | – | – | – |
| Carbonate | 38.6**) | 47.0**) | – | 30.3–73.4 | – |
| Kaolinite | – | – | – | 2.8–30.3 | 32.82 |
| Pyrite | – | – | 10.7–11.4 | 2.5–8.7 | – |
| Jarosite | – | – | 4.2 | – | – |
| Sanidine | – | – | 8.9 | – | – |
| Albite | – | – | – | 4–5.4 | 7.74 |
*Muscovite/illite, **Carbonate (calcite+dolomite)