Journal
MOLECULES
Volume 24, Issue 23, Pages -Publisher
MDPI
DOI: 10.3390/molecules24234331
Keywords
ferric chloride; lignin sulfonate; inhibitor; shale; swelling
Funding
- National Science and Technology Major Project [2017ZX05069004]
- Shaanxi Provincial Key Research and Development Program [2019ZDLGY06-03]
- Scientific Research Program - Shaanxi Provincial Education Department [18JS089]
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A series of ferric chloride-lignin sulfonate (FCLS) was prepared from ferric chloride and lignin sulfonate to be used as shale inhibitor. The swelling rate of clay with FCLS-2 (w/w = 0.3%) decreased to 41.9%. Compared with control, FCLS-2 displayed high inhibitive ability against the hydrating and swelling processes of clay. Thus, the swelling degree of samples with FCLS-2 was much lower than that of the control, as well as the mud ball was more stable in FCLS-2 solution. Essentially, these excellent performances in inhibitor were assigned to the hydrogen bonding, electrostatic interaction and anchoring between FCLS-2 and other components. In addition, FCLS-2 has good compatibility with other common drilling fluid additives, and it can reduce the viscosity of systems, regardless of the room temperature or high temperature.
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