Abstract
Solids sag and formation damage are serious problems encountered while drilling with barite-weighted drilling fluids. The objective of this study is to investigate the effect of reducing barite particle size on rheological properties, fluid stability, and filter cake removal. Barite samples with different particle sizes were prepared using sieve analysis and ball milling technique. Micronized barite (8 µm) showed a moderate stability with zeta potential measurements for a pH range greater than 8. Solubility tests showed good enhancement in barite removal as the particle size was reduced, with a difference of around 11 g/L between the largest size (75–106 µm) and the micronized size of barite. HPHT filtration test results confirmed the solubility results with 5 wt.% enhancement in filter cake removal efficiency as barite particle size was reduced to micronized size.
| Original language | English |
|---|---|
| Pages (from-to) | 1-18 |
| Number of pages | 18 |
| Journal | International Journal of Oil, Gas and Coal Technology |
| Volume | 25 |
| Issue number | 1 |
| DOIs | |
| State | Published - 2020 |
Bibliographical note
Publisher Copyright:Copyright © 2020 Inderscience Enterprises Ltd.
Keywords
- Drilling fluid
- Filter cake removal
- Micronised barite
- Rheological properties
- Stability
- Water-based
- Weighting material
ASJC Scopus subject areas
- General Energy
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