A minimum volume prediction of spacer based on turbulent dispersion theory: Model and example

Abstract

During cementing operations involving cement slurry contamination, problems often occur due to the inaccurate calculation of the space fluid volume. This study, based on the turbulent dispersion theory, developed a minimum volume calculation model of spacer fluid to prevent cement slurry contamination. This model was used to analyze influence factors and practical calculations. The results indicated that the minimum volume of spacer fluid increase with the eccentricity of casing and injection rate and decrease with the density of cement slurry. Additionally, the better rheological properties of the cement slurry and spacer fluid would increase the volume of the spacer fluid. Furthermore, this model fitted actual field data better than other heat calculation models.

Keywords

Cementing / Spacer fluid / Mixing volume / Dispersion coefficient

References

[1] E.F. Morris, H.R. Motley, Oil base spacer system for use in cementing wells containing oil base drilling muds, Fall Meeting of the Society of Petroleum Engineers of AIME, Society of Petroleum Engineers, Las Vegas, Nevada, 1973.

[2] A.A. Soares, JCdO. Freitas DMdA. Melo, R.M. Braga, L. Amaral-Machado, et al., Cement slurry contamination with oil-based drilling fluids, J. Pet. Sci. Eng. 158 (2017) 433-440.

[3] H. Hao, J. Gu, J. Huang, Z. Wang, Q. Wang, et al., Comparative study on cementation of cement-mudcake interface with and without mud-cake-solidificationagents application in oil & gas wells, J. Pet. Sci. Eng. 147 (2016) 143-153.

[4] G. Qi, Z. Wang, Cementing Technology Foundation, Petroleum industry press, Beijing, 2016.

[5] A. Katherine, S.D. Nair, K. Cowan, Contamination of deepwater well cementations by synthetic-based drilling fluids, SPE Deepwater Drilling and Completions Conference, Society of Petroleum Engineers, Galveston, Texas, USA, 2014.

[6] J. De Andrade, S. Sangesland, Cement sheath failure mechanisms: numerical estimates to design for long-term well integrity, J. Pet. Sci. Eng. 147 (2016) 682-698.

[7] H.F.W. Taylor, Cement Chemistry, 2nd, St Edmundsbury Press Ltd, 1990, pp. 325-337.

[8] L. Carney, Cement spacer fluid, Soc. Pet. Eng. J. 26 (1974) 856-858.

[9] M. Li, H. Ou, H. Liu, H. Deng, X. Guo, Research on the impact of inorganic components on the performance of a novel self-solidified spacer fluid, J. Nat. Gas Sci. Eng. 33 (2016) 315-323.

[10] C. Ma, J. Deng, R. Wu, B. Yu, Y. Zhou, S. Lin, A novel self-healing spacer fluid for sustained casing pressure mitigation, J. Pet. Sci. Eng. 163 (2017) 722-730.

[11] K. SD, Cementing, Society of Petroleum Engineers of AIME, 1976.

[12] C. GF,Improved Primary Cementing through Turbulent Flow Techniques SPE-127863-PA 2, (1963), pp. 40-44.

[13] J.W. Brice Jr., B. C. Holmes, Engineered casing cementing programs using turbulent flow techniques, J. Pet. Technol. 16 (1964) 503-508.

[14] D.S. Sankar, N.A.B. Jaafar, Y. Yatim, Nonlinear analysis for shear augmented dispersion of solutes in blood flow through narrow arteries, J. Appl. Math. (2012) 1-24 2012.

[15] G. Taylor,Dispersion of soluble matter in solvent flowing slowly through a tube, Proc. R. Soc. A Math. Phys. Eng. Sci. 219 (1953) 186-203.

[16] R. Aris,On the dispersion of a solute in a fluid flowing through a tube, Proc. Roy. Soc. A Math. Phys. Eng. Sci. 235 (1956) 67-77.

[17] N. GW, J. A, Laminar dispersion in capillaries:Part I. mathematical analysis, AIChE J. 11 (1965) 1063-1072.

[18] L.T. Fan, W.S. wang,Dispersion of ostwald-de waele fluid in laminar flow through a cylindrical tube, Proc. R. Soc. A Math. Phys. Eng. Sci. 283 (1965) 576-582.

[19] L.T. Fan, C.B. Wang,Dispersion of matter in non-Newtonian laminar flow through a circular tube, Proc. Roy. Soc. A Math. Phys. Eng. Sci. 292 (1966) 203-208.

[20] M.K. Sharp, Shear-augmented dispersion in non-Newtonian fluids, Ann. Biomed. Eng. 21 (1993) 407-415.

[21] R.K. Dash, G. Jayaraman, K.N. Mehta, Shear augmented dispersion of a solute in a casson fluid flowing in a conduit, Ann. Biomed. Eng. 28 (2000) 373-385.

[22] K. Yao, The volume and action mechanics of spacer during cementing, Nat. Gas. Ind. 15 (1995) 43-45.

[23] Z. Yonggang, Study of turbulence diffusion of well cementing, J. Southwest Pet. Inst. 15 (1993) 38-42.

[24] D. Chen, G. Wang, A theoretical calculation of the required volume of turbulent spacers, DFCF 27 (2010) 40-42.

[25] W. Tao, Numerical Simulation of Dynamic Displacement Interface of Cement Annulus, Southwest Petroleum University, Chengdu, 2013.

[26] J. B, C. HB, Engineered casing cementing programs using turbulent flow techniques, J. Pet. Technol. 16 (1964) 502-508.

[27] Z. Li, G. Cai, Non-Newtonian Fluid Mechanics, University of Petroleum Press, Dongying, 2001, pp. 80-83.

[28] J. Li, S. Walker, Sensitivity analysis of hole cleaning parameters in directional wells, SPE J. 6 (2001) 356-369.

[29] R. Avila, E. Pereira, S. Miska, Correlations and analysis of cuttings transport with aerated fluids in deviated Wells, Sep. Drill. Compl. 23 (2008) 132-141.