Drilling fluids with scavengers help control H[sub 2]S
- M-I Drilling Fluids Co., Houston, TX (United States)
Maintaining a high pH and using chemical sulfide scavengers in oil-based and water-based drilling muds can neutralize hydrogen sulfide (H[sub 2]S). Safe, successful drilling of H[sub 2]S-bearing formations requires good drilling practices, extra attention to casing design, and proper drilling fluid formulation. The drilling fluid must be capable of controlling formation pressures, protecting workers, inhibiting corrosion, limiting drilling fluid contamination, maintaining well bore stability, and removing sulfide contamination rapidly. High-alkalinity drilling fluids with excess lime are recommended to provide buffering capacity for pH neutralization. Following the detection of soluble sulfides, the fluid should be immediately treated with the applicable scavenger. Sulfide scavengers must react with soluble sulfides to form an insoluble metal sulfide precipitate. Effective scavengers must have rapid and complete reactions with H[sup 2]S, HS[sup [minus]], and S[sup =] in the chemical and physical environment of the circulating system with minimal side effects. Currently, three zinc-based additives and one iron oxide compound are the most widely used scavengers.
- OSTI ID:
- 7281794
- Journal Information:
- Oil and Gas Journal; (United States), Vol. 92:21; ISSN 0030-1388
- Country of Publication:
- United States
- Language:
- English
Similar Records
An experimental study of gas solubility in oil-base drilling fluids
Methods for field monitoring of oil-based drilling fluids for hydrogen sulfide and water intrusions
Related Subjects
DRILLING FLUIDS
ADDITIVES
HYDROGEN SULFIDES
DECOMPOSITION
ACID NEUTRALIZING CAPACITY
CHELATES
CORROSION
IRON OXIDES
MITIGATION
PH VALUE
ZINC CARBONATES
ZINC COMPOUNDS
ZINC OXIDES
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
COMPLEXES
FLUIDS
HYDROGEN COMPOUNDS
IRON COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
WATER CHEMISTRY
020300* - Petroleum- Drilling & Production