Abstract

For the purpose of reducing the invasion depth of solid phase and liquid phase of drilling fluid and improving the quality of drilling mud cake, polyacrylamide microspheres were successfully composed via reversed phrase emulsion method. The physical and chemical structures of the samples as well as the grain-size variation were investigated by Transmission Electron Microscopy (TEM) and Laser Particle Size Analysis method (LPSA).The plugging performance of the samples were investigated by core plugging experiment and sand bed filtration experiment. TEM images show that acrylamide has been polymerized, the products consist of a lot of monodisperse microspheres with a size of about 1-6 μm. LPSA images indicate that the particle size of polyacrylamide microspheres vary with time and temperature regularly. The experiment that simulates rock strata with different permeability shows those polyacrylamide microspheres can produce effectively blocked to the core and sand bed and then it establishes the foundation for the next field test.

Keywords:

Drilling fluid, microspheres, polyacrylamide, sealing characteristics, synthesis,

References

1. Feng, Q.Z., L.X. Zhao, B.L. Chu, W. Yan and J.M. Lin, 2008. Synthesis and binding site characteristics of 2, 4, 6-trichlorophenol-imprinted polymers. Anal. Bioanal Chem., 392: 1419-1429.
   CrossRef    PMid:18820903    
2. Han, J., 2011. Synthesis and evaluation of drilling fluid reinforced adhesion agent of inverse emulsion. Chem. Eng., 39: 71-73.
   
3. Han, X.Z., M.Y. Li, M.Q. Lin and Z.L. Wu, 2010. Analysis of influence factors of cross linked polymer microspheres particle size. Petrochem. Ind., 39: 321-324.
   
4. Huang, J., T. Huang, L. Liu, W. Huang and R. Ma, 2011. Mo2C/SBA-15 modified by ni for the dry reforming of methane. Energy Sources, Part A, 33: 2249-2256.
   
5. Jia, R.K., L.Y. Zhen, Y.N. Yan, H.C. Gu and L.Z. Fang, 2011. Synthesis of amphipathic compound and in the role of self-assembled photonic film. Proceeding of the International Conference on Informatics, Cybernetics and Computer Engineering (ICCE2011) November 19-20, Melbourne, Australia.
   CrossRef    
6. Jiang, S., B.Y. Jiang and G.L. Lei, 2011. Research on elastic microsphere indepth fluid diverting technology. Oil Gas Well Test., 20: 16-19.
   
7. Jie, L., J. Shu, H.Y. Wang, S.K. Liu and L.Y. Wang, 2011. Preparation and characterization of polystyrene/polycarbonate composite hollow microspheres by microencapsulation method. Mater. Sci., 46: 3604-3610.
   CrossRef    
8. Qian, Y.H., L. Li, P.F. Li, C.Y. Zhang and X. Li, 2008. Synthesis and evaluation of heat resistance and salt tolerance high water absorbent resin selective particle plugging agent. J. Oil Gas Technol., 30: 311-313.
   
9. Wang, T., J.H. Xiao, H.Q. Sun, Z.Q. Cao and D.F. Song, 2006. Influence factors of polymer microsphere particle size and plugging characteristics. Petrol. Geol. Recovery Effic., 13: 80-82.
   

Competing interests

The authors have no competing interests.

Open Access Policy

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Copyright

The authors have no competing interests.