Application Study of Phase Inversion for Drilling Fluid in Well Lianhua 000-X2#

Abstract:

In order to reduce the flow resistance of a water-based drilling fluid, emulsifiers tend to be added into the drilling fluid mixed with oil at the same time. However, inappropriate proportion or oil-based pipe free agent with low HLB value could easily trigger the phase inversion of the drilling fluid, causing its stability loss or even water–solid separation. Therefore, starting from the root cause of the phase inversion, the surfactivity of solid-phase materials in the drilling fluid was changed from hydrophobicity to hydrophilicity by adding surfactants with high HLB value. Then its colloidal properties were reestablished by combining alkali diluting agent, and the drilling fluid with phase inversion of well Lianhua 000-X2# was treated indoors. The results of the field application in the well show that high-HLB surfactant can solve the phase inversion of a water-based drilling fluid properly, and that barite sedimentation and well control problem, caused by the phase inversion of the water-based drilling fluid with high-density, can be avoided.

• Periodical: Advanced Materials Research (Volumes 524-527)
• Pages: 1153-1156
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.524-527.1153
• Online since: May 2012
• Authors: Li Yang, Yun Peng An, Nan Tian, Jun Ma, Jian Hua Yao
• Keywords: Drag Reduction, Drilling Fluid, Emulsifier, Phase Inversion, Solid-Liquid Separation

References

[1] H.R. Huang, K.P. Yang and P.Y. Luo: Principles of Drilling Fluid Technology, edited by Petroleum Industry Press, Beijing, China, 1996.

[2] J.N. Yan: Technology of Drilling Fluid, edited by Petroleum University Press, China, 2005.

[3] T.T. Xu, L.L. Chen and P.Y. Luo: Deep Drilling Fluid, edited by Petroleum University Press, Beijing, China, 1994.

[4] X. Wang, Y. Liu and Y. Wang, Study and preparation of LH-1 oil in water emulsion pipe-free agent , J. Drilling Fluid and Completion Fluid (in Chinese), 23 (2006) 30-31, 36.

[5] Q. Lan, C.M. Su, W.R. Liu, F. Yang, B.Y. Guo and D.J. Sun, Emulsions and emulsifying technique and their application in drilling and completion fluid, J. Drilling Fluid and Completion Fluid (in Chinese), 23 (2006) 61-63.