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Polyethyleneimine as Shale Inhibitor in Drilling Fluid by Jiang Guancheng; Qi Yourong; An Yuxiu; Huang Xianbin; Ren Yanjun is a Materials Science article available to read on EtoBox.

What is Polyethyleneimine as Shale Inhibitor in Drilling Fluid about?

In this paper, the inhibition property of polyethyleneimine (PEI) in drilling fluid was studied. The inhibition property was evaluated by linear swell test and roll recovery. The addition of PEI70000 resulted in the lowest swelling height, compared with the others inhibitor. Especially PEI was environmental and friendly. The inhibition mechanism was investigated by Fourier transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Scanning electron microscopy, Zeta potential and Surface area analyzer. The negative charge in the surface of montmorillonite (Mt) was neutralized by the positive charge of PEI. PEI was adsorbed in the surface of Mt and intercalated into the interlayer of Mt, which reduced the hydration repulsion of diffuse electric double layer and leaded to inhibit the hydration of clay. Hydrogen bonding between amino groups in PEI and hydroxyl in the surface of Mt can be formed in the process. The coordination of electrostatic interaction and hydrogen bonding presented water molecules from the interlayer space of Mt, which resulted from the adsorption and intercalation of PEI in the surface and interlayer space of Mt. There was an amount of n

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Author

Jiang Guancheng; Qi Yourong; An Yuxiu; Huang Xianbin; Ren Yanjun

Published

2016

Language

EN

Field

Materials Science (Physical Sciences)